diff --git a/adapters/connatix/connatix.go b/adapters/connatix/connatix.go
new file mode 100644
index 00000000000..74ff5956848
--- /dev/null
+++ b/adapters/connatix/connatix.go
@@ -0,0 +1,236 @@
+package connatix
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/buger/jsonparser"
+	"github.com/prebid/openrtb/v20/openrtb2"
+	"github.com/prebid/prebid-server/v3/adapters"
+	"github.com/prebid/prebid-server/v3/config"
+	"github.com/prebid/prebid-server/v3/errortypes"
+	"github.com/prebid/prebid-server/v3/openrtb_ext"
+	"github.com/prebid/prebid-server/v3/util/jsonutil"
+)
+
+const (
+	maxImpsPerReq = 1
+)
+
+// Builder builds a new instance of the Connatix adapter for the given bidder with the given config.
+func Builder(bidderName openrtb_ext.BidderName, config config.Adapter, server config.Server) (adapters.Bidder, error) {
+	bidder := &adapter{
+		endpoint: config.Endpoint,
+	}
+	return bidder, nil
+}
+
+func (a *adapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapters.ExtraRequestInfo) ([]*adapters.RequestData, []error) {
+	if request.Device == nil || (request.Device.IP == "" && request.Device.IPv6 == "") {
+		return nil, []error{&errortypes.BadInput{
+			Message: "Device IP is required",
+		}}
+	}
+
+	// connatix adapter expects imp.displaymanagerver to be populated in openrtb2 request
+	// but some SDKs will put it in imp.ext.prebid instead
+	displayManagerVer := buildDisplayManagerVer(request)
+
+	var errs []error
+
+	validImps := []openrtb2.Imp{}
+
+	for i := range request.Imp {
+		impExtIncoming, err := validateAndBuildImpExt(&request.Imp[i])
+		if err != nil {
+			errs = append(errs, err)
+			continue
+		}
+
+		if err := buildRequestImp(&request.Imp[i], impExtIncoming, displayManagerVer, reqInfo); err != nil {
+			errs = append(errs, err)
+			continue
+		}
+
+		validImps = append(validImps, request.Imp[i])
+	}
+
+	// Divide imps to several requests
+	requests, errors := splitRequests(validImps, request, a.endpoint)
+	return requests, append(errs, errors...)
+}
+
+func (a *adapter) MakeBids(internalRequest *openrtb2.BidRequest, externalRequest *adapters.RequestData, response *adapters.ResponseData) (*adapters.BidderResponse, []error) {
+	if adapters.IsResponseStatusCodeNoContent(response) {
+		return nil, nil
+	}
+
+	if err := adapters.CheckResponseStatusCodeForErrors(response); err != nil {
+		return nil, []error{err}
+	}
+
+	var connatixResponse openrtb2.BidResponse
+	if err := jsonutil.Unmarshal(response.Body, &connatixResponse); err != nil {
+		return nil, []error{err}
+	}
+
+	var errs []error
+	bidderResponse := adapters.NewBidderResponseWithBidsCapacity(1)
+	for _, sb := range connatixResponse.SeatBid {
+		for i := range sb.Bid {
+			bid := sb.Bid[i]
+			var bidExt bidExt
+			var bidType openrtb_ext.BidType
+
+			if err := jsonutil.Unmarshal(bid.Ext, &bidExt); err != nil {
+				bidType = openrtb_ext.BidTypeBanner
+			} else {
+				bidType = getBidType(bidExt)
+			}
+
+			bidderResponse.Bids = append(bidderResponse.Bids, &adapters.TypedBid{
+				Bid:     &bid,
+				BidType: bidType,
+			})
+		}
+	}
+
+	bidderResponse.Currency = "USD"
+
+	return bidderResponse, errs
+}
+
+func validateAndBuildImpExt(imp *openrtb2.Imp) (impExtIncoming, error) {
+	var ext impExtIncoming
+	if err := jsonutil.Unmarshal(imp.Ext, &ext); err != nil {
+		return impExtIncoming{}, err
+	}
+
+	return ext, nil
+}
+
+func splitRequests(imps []openrtb2.Imp, request *openrtb2.BidRequest, uri string) ([]*adapters.RequestData, []error) {
+	var errs []error
+	// Initial capacity for future array of requests, memory optimization.
+	// Let's say there are 35 impressions and limit impressions per request equals to 10.
+	// In this case we need to create 4 requests with 10, 10, 10 and 5 impressions.
+	// With this formula initial capacity=(35+10-1)/10 = 4
+	initialCapacity := (len(imps) + maxImpsPerReq - 1) / maxImpsPerReq
+	resArr := make([]*adapters.RequestData, 0, initialCapacity)
+	startInd := 0
+	impsLeft := len(imps) > 0
+
+	headers := http.Header{}
+	headers.Add("Content-Type", "application/json")
+	headers.Add("Accept", "application/json")
+
+	if request.Device != nil {
+		if len(request.Device.UA) > 0 {
+			headers.Add("User-Agent", request.Device.UA)
+		}
+
+		if len(request.Device.IPv6) > 0 {
+			headers.Add("X-Forwarded-For", request.Device.IPv6)
+		}
+
+		if len(request.Device.IP) > 0 {
+			headers.Add("X-Forwarded-For", request.Device.IP)
+		}
+	}
+
+	for impsLeft {
+		endInd := startInd + maxImpsPerReq
+		if endInd >= len(imps) {
+			endInd = len(imps)
+			impsLeft = false
+		}
+		impsForReq := imps[startInd:endInd]
+		request.Imp = impsForReq
+
+		reqJSON, err := jsonutil.Marshal(request)
+		if err != nil {
+			errs = append(errs, err)
+			return nil, errs
+		}
+
+		resArr = append(resArr, &adapters.RequestData{
+			Method:  "POST",
+			Uri:     uri,
+			Body:    reqJSON,
+			Headers: headers,
+			ImpIDs:  openrtb_ext.GetImpIDs(request.Imp),
+		})
+		startInd = endInd
+	}
+	return resArr, errs
+}
+
+func buildRequestImp(imp *openrtb2.Imp, ext impExtIncoming, displayManagerVer string, reqInfo *adapters.ExtraRequestInfo) error {
+	if imp.Banner != nil {
+		bannerCopy := *imp.Banner
+
+		if bannerCopy.W == nil && bannerCopy.H == nil && len(bannerCopy.Format) > 0 {
+			firstFormat := bannerCopy.Format[0]
+			bannerCopy.W = &(firstFormat.W)
+			bannerCopy.H = &(firstFormat.H)
+		}
+		imp.Banner = &bannerCopy
+	}
+
+	// Populate imp.displaymanagerver if the SDK failed to do it.
+	if len(imp.DisplayManagerVer) == 0 && len(displayManagerVer) > 0 {
+		imp.DisplayManagerVer = displayManagerVer
+	}
+
+	// Check if imp comes with bid floor amount defined in a foreign currency
+	if imp.BidFloor > 0 && imp.BidFloorCur != "" && !strings.EqualFold(imp.BidFloorCur, "USD") {
+		// Convert to US dollars
+		convertedValue, err := reqInfo.ConvertCurrency(imp.BidFloor, imp.BidFloorCur, "USD")
+		if err != nil {
+			return err
+		}
+		// Update after conversion. All imp elements inside request.Imp are shallow copies
+		// therefore, their non-pointer values are not shared memory and are safe to modify.
+		imp.BidFloorCur = "USD"
+		imp.BidFloor = convertedValue
+	}
+
+	impExt := impExt{
+		Connatix: impExtConnatix{
+			PlacementId: ext.Bidder.PlacementId,
+		},
+	}
+
+	var err error
+	imp.Ext, err = json.Marshal(impExt)
+
+	return err
+}
+
+func buildDisplayManagerVer(req *openrtb2.BidRequest) string {
+	if req.App == nil {
+		return ""
+	}
+
+	source, err := jsonparser.GetString(req.App.Ext, openrtb_ext.PrebidExtKey, "source")
+	if err != nil {
+		return ""
+	}
+
+	version, err := jsonparser.GetString(req.App.Ext, openrtb_ext.PrebidExtKey, "version")
+	if err != nil {
+		return ""
+	}
+
+	return fmt.Sprintf("%s-%s", source, version)
+}
+
+func getBidType(ext bidExt) openrtb_ext.BidType {
+	if ext.Cnx.MediaType == "video" {
+		return openrtb_ext.BidTypeVideo
+	}
+
+	return openrtb_ext.BidTypeBanner
+}
diff --git a/adapters/connatix/connatix_test.go b/adapters/connatix/connatix_test.go
new file mode 100644
index 00000000000..018926ef25a
--- /dev/null
+++ b/adapters/connatix/connatix_test.go
@@ -0,0 +1,20 @@
+package connatix
+
+import (
+	"testing"
+
+	"github.com/prebid/prebid-server/v3/adapters/adapterstest"
+	"github.com/prebid/prebid-server/v3/config"
+	"github.com/prebid/prebid-server/v3/openrtb_ext"
+)
+
+func TestJsonSamples(t *testing.T) {
+	bidder, buildErr := Builder(openrtb_ext.BidderConnatix, config.Adapter{
+		Endpoint: "http://example.com"}, config.Server{ExternalUrl: "http://hosturl.com", GvlID: 1, DataCenter: "2"})
+
+	if buildErr != nil {
+		t.Fatalf("Builder returned unexpected error %v", buildErr)
+	}
+
+	adapterstest.RunJSONBidderTest(t, "connatixtest", bidder)
+}
diff --git a/adapters/connatix/connatixtest/exemplary/banner-app.json b/adapters/connatix/connatixtest/exemplary/banner-app.json
new file mode 100644
index 00000000000..823c439b086
--- /dev/null
+++ b/adapters/connatix/connatixtest/exemplary/banner-app.json
@@ -0,0 +1,161 @@
+{
+  "mockBidRequest": {
+    "id": "some-request-id",
+    "device": {
+      "ua": "test-user-agent",
+      "ip": "123.123.123.123",
+      "language": "en",
+      "dnt": 0
+    },
+    "tmax": 500,
+    "user": {
+      "buyeruid": "some-user"
+    },
+    "app": {
+      "publisher": {
+        "id": "123456789"
+      },
+      "cat": [
+        "IAB22-1"
+      ],
+      "bundle": "com.app.awesome",
+      "name": "Awesome App",
+      "domain": "awesomeapp.com",
+      "id": "123456789"
+    },
+    "imp": [
+      {
+        "id": "some-imp-id",
+        "tagid": "some-tag-id",
+        "banner": {
+          "format":[
+            {
+              "w": 320,
+              "h": 50
+            }
+          ]
+        },
+        "ext": {
+          "bidder": {
+            "placementId": "some-placement-id"
+          }
+        }
+      }
+    ]
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "http://example.com",
+        "body": {
+          "id": "some-request-id",
+          "device": {
+            "ua": "test-user-agent",
+            "ip": "123.123.123.123",
+            "language": "en",
+            "dnt": 0
+          },
+          "imp": [
+            {
+              "id": "some-imp-id",
+              "tagid": "some-tag-id",
+              "banner": {
+                "w": 320,
+                "h": 50,
+                "format": [
+                  {
+                    "w": 320,
+                    "h": 50
+                  }
+                ]
+              },
+              "ext": {
+                "connatix": {
+                  "placementId": "some-placement-id"
+                }
+              }
+            }
+          ],
+          "app": {
+            "id": "123456789",
+            "name": "Awesome App",
+            "bundle": "com.app.awesome",
+            "domain": "awesomeapp.com",
+            "cat": [
+              "IAB22-1"
+            ],
+            "publisher": {
+              "id": "123456789"
+            }
+          },
+          "user": {
+            "buyeruid": "some-user"
+          },
+          "tmax": 500
+        },
+        "impIDs": [
+          "some-imp-id"
+        ]
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "test-response-id",
+          "seatbid": [
+            {
+              "bid": [
+                {
+                  "id": "some-bid-id",
+                  "impid": "some-imp-id",
+                  "price": 0.52,
+                  "adm": "some-test-ad",
+                  "adomain": [
+                    "test.com"
+                  ],
+                  "crid": "112233",
+                  "w": 320,
+                  "h": 50,
+                  "ext": {
+                    "connatix": {
+                      "mediaType": "banner"
+                    }
+                  }
+                }
+              ],
+              "seat": "connatix",
+              "group": 0
+            }
+          ],
+          "cur": "USD"
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "currency": "USD",
+      "bids": [
+        {
+          "bid": {
+            "id": "some-bid-id",
+            "impid": "some-imp-id",
+            "price": 0.52,
+            "adm": "some-test-ad",
+            "crid": "112233",
+            "adomain": [
+              "test.com"
+            ],
+            "w": 320,
+            "h": 50,
+            "ext": {
+              "connatix": {
+                "mediaType": "banner"
+              }
+            }
+          },
+          "type": "banner"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/exemplary/banner-web.json b/adapters/connatix/connatixtest/exemplary/banner-web.json
new file mode 100644
index 00000000000..a48ef5b1be5
--- /dev/null
+++ b/adapters/connatix/connatixtest/exemplary/banner-web.json
@@ -0,0 +1,141 @@
+{
+  "mockBidRequest": {
+    "id": "some-request-id",
+    "device": {
+      "ua": "test-user-agent",
+      "ipv6": "test-ip-v6",
+      "language": "en",
+      "dnt": 0
+    },
+    "tmax": 1000,
+    "user": {
+      "buyeruid": "some-user"
+    },
+    "site": {
+      "page": "test.com",
+      "publisher": {
+        "id": "123456789"
+      }
+    },
+    "imp": [
+      {
+        "id": "some-impression-id",
+        "tagid": "some-tag-id",
+        "banner": {
+          "w":320,
+          "h":50
+        },
+        "ext": {
+          "bidder": {
+            "placementId": "some-placement-id"
+          }
+        }
+      }
+    ]
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "http://example.com",
+        "headers": {
+          "Content-Type": ["application/json"],
+          "X-Forwarded-For": ["test-ip-v6"],
+          "Accept": ["application/json"],
+          "User-Agent": ["test-user-agent"]
+        },
+        "body": {
+          "id": "some-request-id",
+          "device": {
+            "ua": "test-user-agent",
+            "ipv6": "test-ip-v6",
+            "language": "en",
+            "dnt": 0
+          },
+          "imp": [
+            {
+              "id": "some-impression-id",
+              "tagid": "some-tag-id",
+              "banner": {
+                "w":320,
+                "h":50
+              },
+              "ext": {
+                "connatix": {
+                  "placementId": "some-placement-id"
+                }
+              }
+            }
+          ],
+          "site": {
+            "page": "test.com",
+            "publisher": {
+              "id": "123456789"
+            }
+          },
+          "user": {
+            "buyeruid": "some-user"
+          },
+          "tmax": 1000
+        },
+        "impIDs":["some-impression-id"]
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "some-response-id",
+          "seatbid": [
+            {
+              "bid": [
+                {
+                  "id": "a3ae1b4e2fc24a4fb45540082e98e161",
+                  "impid": "some-impression-id",
+                  "price": 0.3,
+                  "adm": "some-test-ad",
+                  "adomain": [
+                    "awesome.com"
+                  ],
+                  "crid": "112233",
+                  "w": 320,
+                  "h": 50,
+                  "ext": {
+                    "connatix": {
+                      "mediaType": "banner"
+                    }
+                  }
+                }
+              ],
+              "seat": "connatix"
+            }
+          ],
+          "cur": "USD"
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "bids":[
+        {
+          "bid":  {
+            "id": "a3ae1b4e2fc24a4fb45540082e98e161",
+            "impid": "some-impression-id",
+            "price": 0.3,
+            "adm": "some-test-ad",
+            "crid": "112233",
+            "adomain": [
+              "awesome.com"
+            ],
+            "w": 320,
+            "h": 50,
+            "ext": {
+              "connatix": {
+                "mediaType": "banner"
+              }
+            }
+          },
+          "type": "banner"
+        }
+      ]
+    }
+  ]
+}
diff --git a/adapters/connatix/connatixtest/exemplary/video-app.json b/adapters/connatix/connatixtest/exemplary/video-app.json
new file mode 100644
index 00000000000..bff1f1b1362
--- /dev/null
+++ b/adapters/connatix/connatixtest/exemplary/video-app.json
@@ -0,0 +1,157 @@
+{
+  "mockBidRequest": {
+    "id": "some-request-id",
+    "device": {
+      "ua": "test-user-agent",
+      "ip": "123.123.123.123",
+      "language": "en",
+      "dnt": 0
+    },
+    "tmax": 1000,
+    "user": {
+      "buyeruid": "some-user"
+    },
+    "app": {
+      "publisher": {
+        "id": "123456789"
+      },
+      "cat": [
+        "IAB22-1"
+      ],
+      "bundle": "com.app.awesome",
+      "name": "Awesome App",
+      "domain": "awesomeapp.com",
+      "id": "123456789"
+    },
+    "imp": [
+      {
+        "id": "some-impression-id",
+        "tagid": "some-tag-id",
+        "video": {
+          "mimes": [
+            "video/mp4"
+          ],
+          "w": 640,
+          "h": 480,
+          "minduration": 120,
+          "maxduration": 150
+        },
+        "ext": {
+          "bidder": {
+            "placementId": "some-placement-id"
+          }
+        }
+      }
+    ]
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "http://example.com",
+        "body": {
+          "id": "some-request-id",
+          "device": {
+            "ua": "test-user-agent",
+            "ip": "123.123.123.123",
+            "language": "en",
+            "dnt": 0
+          },
+          "imp": [
+            {
+              "id": "some-impression-id",
+              "video": {
+                "mimes": [
+                  "video/mp4"
+                ],
+                "minduration": 120,
+                "maxduration": 150,
+                "w": 640,
+                "h": 480
+              },
+              "tagid": "some-tag-id",
+              "ext": {
+                "connatix": {
+                  "placementId": "some-placement-id"
+                }
+              }
+            }
+          ],
+          "app": {
+            "id": "123456789",
+            "name": "Awesome App",
+            "bundle": "com.app.awesome",
+            "domain": "awesomeapp.com",
+            "cat": [
+              "IAB22-1"
+            ],
+            "publisher": {
+              "id": "123456789"
+            }
+          },
+          "user": {
+            "buyeruid": "some-user"
+          },
+          "tmax": 1000
+        },
+        "impIDs":["some-impression-id"]
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "some-response-id",
+          "seatbid": [
+            {
+              "bid": [
+                {
+                  "id": "b3ae1b4e2fc24a4fb45540082e98e161",
+                  "impid": "some-impression-id",
+                  "price": 3.1,
+                  "adm": "some-test-vast-ad",
+                  "adomain": [
+                    "awesome.com"
+                  ],
+                  "crid": "112233",
+                  "w": 1280,
+                  "h": 720,
+                  "ext": {
+                    "connatix": {
+                      "mediaType": "video"
+                    }
+                  }
+                }
+              ],
+              "seat": "connatix"
+            }
+          ],
+          "cur": "USD"
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "bids":[
+        {
+          "bid":  {
+            "id": "b3ae1b4e2fc24a4fb45540082e98e161",
+            "impid": "some-impression-id",
+            "price": 3.1,
+            "adm": "some-test-vast-ad",
+            "crid": "112233",
+            "adomain": [
+              "awesome.com"
+            ],
+            "w": 1280,
+            "h": 720,
+            "ext": {
+              "connatix": {
+                "mediaType": "video"
+              }
+            }
+          },
+          "type": "video"
+        }
+      ]
+    }
+  ]
+}
diff --git a/adapters/connatix/connatixtest/exemplary/video-web.json b/adapters/connatix/connatixtest/exemplary/video-web.json
new file mode 100644
index 00000000000..b1ab16d0b9a
--- /dev/null
+++ b/adapters/connatix/connatixtest/exemplary/video-web.json
@@ -0,0 +1,153 @@
+{
+  "mockBidRequest": {
+    "id": "some-request-id",
+    "device": {
+      "ua": "test-user-agent",
+      "ip": "test-ip-v4",
+      "ipv6": "test-ip-v6",
+      "language": "en",
+      "dnt": 0
+    },
+    "tmax": 1000,
+    "user": {
+      "buyeruid": "some-user"
+    },
+    "site": {
+      "page": "test.com",
+      "publisher": {
+        "id": "123456789"
+      }
+    },
+    "imp": [
+      {
+        "id": "some-impression-id",
+        "tagid": "some-tag-id",
+        "video": {
+          "mimes": [
+            "video/mp4"
+          ],
+          "w": 640,
+          "h": 480,
+          "minduration": 120,
+          "maxduration": 150
+        },
+        "ext": {
+          "bidder": {
+            "placementId": "some-placement-id"
+          }
+        }
+      }
+    ]
+  },
+  "httpCalls": [
+    {
+      "expectedRequest": {
+        "uri": "http://example.com",
+        "body": {
+          "id": "some-request-id",
+          "device": {
+            "ua": "test-user-agent",
+            "ip": "test-ip-v4",
+            "ipv6": "test-ip-v6",
+            "language": "en",
+            "dnt": 0
+          },
+          "imp": [
+            {
+              "id": "some-impression-id",
+              "tagid": "some-tag-id",
+              "video": {
+                "mimes": [
+                  "video/mp4"
+                ],
+                "minduration": 120,
+                "maxduration": 150,
+                "w": 640,
+                "h": 480
+              },
+              "ext": {
+                "connatix": {
+                  "placementId": "some-placement-id"
+                }
+              }
+            }
+          ],
+          "site": {
+            "page": "test.com",
+            "publisher": {
+              "id": "123456789"
+            }
+          },
+          "user": {
+            "buyeruid": "some-user"
+          },
+          "tmax": 1000
+        },
+        "headers": {
+          "Content-Type": ["application/json"],
+          "X-Forwarded-For": ["test-ip-v6", "test-ip-v4"],
+          "Accept": ["application/json"],
+          "User-Agent": ["test-user-agent"]
+        },
+        "impIDs":["some-impression-id"]
+      },
+      "mockResponse": {
+        "status": 200,
+        "body": {
+          "id": "some-response-id",
+          "seatbid": [
+            {
+              "bid": [
+                {
+                  "id": "b3ae1b4e2fc24a4fb45540082e98e161",
+                  "impid": "some-impression-id",
+                  "price": 3.5,
+                  "adm": "some-test-vast-ad",
+                  "adomain": [
+                    "awesome.com"
+                  ],
+                  "crid": "112233",
+                  "w": 1280,
+                  "h": 720,
+                  "ext": {
+                    "connatix": {
+                      "mediaType": "video"
+                    }
+                  }
+                }
+              ],
+              "seat": "connatix"
+            }
+          ],
+          "cur": "USD"
+        }
+      }
+    }
+  ],
+  "expectedBidResponses": [
+    {
+      "bids": [
+        {
+          "bid": {
+            "id": "b3ae1b4e2fc24a4fb45540082e98e161",
+            "impid": "some-impression-id",
+            "price": 3.5,
+            "adm": "some-test-vast-ad",
+            "adomain": [
+              "awesome.com"
+            ],
+            "crid": "112233",
+            "w": 1280,
+            "h": 720,
+            "ext": {
+              "connatix": {
+                "mediaType": "video"
+              }
+            }
+          },
+          "type":"video"
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/bad-request-invalid-imp-ext.json b/adapters/connatix/connatixtest/supplemental/bad-request-invalid-imp-ext.json
new file mode 100644
index 00000000000..3ee7a3ccbb0
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/bad-request-invalid-imp-ext.json
@@ -0,0 +1,54 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "123.123.123.123",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 500,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "app": {
+        "publisher": {
+          "id": "123456789"
+        },
+        "cat": [
+          "IAB22-1"
+        ],
+        "bundle": "com.app.awesome",
+        "name": "Awesome App",
+        "domain": "awesomeapp.com",
+        "id": "123456789"
+      },
+      "imp": [
+        {
+          "id": "some-imp-id",
+          "tagid": "some-tag-id",
+          "banner": {
+            "format":[
+              {
+                "w": 320,
+                "h": 50
+              }
+            ]
+          },
+          "ext": {
+            "bidder": {
+              "placementId": {}
+            }
+          }
+        }
+      ]
+    },
+    "httpCalls": [],
+    "expectedBidResponses": [],
+    "expectedMakeRequestsErrors": [
+        {
+            "value": "cannot unmarshal openrtb_ext.ExtImpConnatix.PlacementId: expects \" or n, but found {",
+            "comparison": "literal"
+        }
+    ]
+  }
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/bad-request-no-ip.json b/adapters/connatix/connatixtest/supplemental/bad-request-no-ip.json
new file mode 100644
index 00000000000..3f7dcbf064a
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/bad-request-no-ip.json
@@ -0,0 +1,46 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 1000,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "site": {
+        "page": "test.com",
+        "publisher": {
+          "id": "123456789"
+        }
+      },
+      "imp": [
+        {
+          "id": "some-impression-id",
+          "tagid": "some-tag-id",
+          "video": {
+            "mimes": [
+              "video/mp4"
+            ],
+            "w": 640,
+            "h": 480,
+            "minduration": 120,
+            "maxduration": 150
+          },
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id"
+            }
+          }
+        }
+      ]
+    },
+    "expectedMakeRequestsErrors": [
+        {
+          "value": "Device IP is required",
+          "comparison": "literal"
+        }
+    ]
+}
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/bid-response-400-status-code.json b/adapters/connatix/connatixtest/supplemental/bid-response-400-status-code.json
new file mode 100644
index 00000000000..59b77c1dae5
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/bid-response-400-status-code.json
@@ -0,0 +1,113 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "123.123.123.123",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 500,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "app": {
+        "publisher": {
+          "id": "123456789"
+        },
+        "cat": [
+          "IAB22-1"
+        ],
+        "bundle": "com.app.awesome",
+        "name": "Awesome App",
+        "domain": "awesomeapp.com",
+        "id": "123456789"
+      },
+      "imp": [
+        {
+          "id": "some-imp-id",
+          "tagid": "some-tag-id",
+          "banner": {
+            "format":[
+              {
+                "w": 320,
+                "h": 50
+              }
+            ]
+          },
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id"
+            }
+          }
+        }
+      ]
+    },
+    "httpCalls": [
+      {
+        "expectedRequest": {
+          "uri": "http://example.com",
+          "body": {
+            "id": "some-request-id",
+            "device": {
+              "ua": "test-user-agent",
+              "ip": "123.123.123.123",
+              "language": "en",
+              "dnt": 0
+            },
+            "imp": [
+              {
+                "id": "some-imp-id",
+                "tagid": "some-tag-id",
+                "banner": {
+                  "w": 320,
+                  "h": 50,
+                  "format": [
+                    {
+                      "w": 320,
+                      "h": 50
+                    }
+                  ]
+                },
+                "ext": {
+                  "connatix": {
+                    "placementId": "some-placement-id"
+                  }
+                }
+              }
+            ],
+            "app": {
+              "id": "123456789",
+              "name": "Awesome App",
+              "bundle": "com.app.awesome",
+              "domain": "awesomeapp.com",
+              "cat": [
+                "IAB22-1"
+              ],
+              "publisher": {
+                "id": "123456789"
+              }
+            },
+            "user": {
+              "buyeruid": "some-user"
+            },
+            "tmax": 500
+          },
+          "impIDs": [
+            "some-imp-id"
+          ]
+        },
+        "mockResponse": {
+          "status": 400,
+          "body": null
+        }
+      }
+    ],
+    "expectedBidResponses": [],
+    "expectedMakeBidsErrors": [
+        {
+            "value": "Unexpected status code: 400. Run with request.debug = 1 for more info",
+            "comparison": "literal"
+        }
+    ]
+  }
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/bid-response-no-content.json b/adapters/connatix/connatixtest/supplemental/bid-response-no-content.json
new file mode 100644
index 00000000000..6b17338d613
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/bid-response-no-content.json
@@ -0,0 +1,107 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "123.123.123.123",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 500,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "app": {
+        "publisher": {
+          "id": "123456789"
+        },
+        "cat": [
+          "IAB22-1"
+        ],
+        "bundle": "com.app.awesome",
+        "name": "Awesome App",
+        "domain": "awesomeapp.com",
+        "id": "123456789"
+      },
+      "imp": [
+        {
+          "id": "some-imp-id",
+          "tagid": "some-tag-id",
+          "banner": {
+            "format":[
+              {
+                "w": 320,
+                "h": 50
+              }
+            ]
+          },
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id"
+            }
+          }
+        }
+      ]
+    },
+    "httpCalls": [
+      {
+        "expectedRequest": {
+          "uri": "http://example.com",
+          "body": {
+            "id": "some-request-id",
+            "device": {
+              "ua": "test-user-agent",
+              "ip": "123.123.123.123",
+              "language": "en",
+              "dnt": 0
+            },
+            "imp": [
+              {
+                "id": "some-imp-id",
+                "tagid": "some-tag-id",
+                "banner": {
+                  "w": 320,
+                  "h": 50,
+                  "format": [
+                    {
+                      "w": 320,
+                      "h": 50
+                    }
+                  ]
+                },
+                "ext": {
+                  "connatix": {
+                    "placementId": "some-placement-id"
+                  }
+                }
+              }
+            ],
+            "app": {
+              "id": "123456789",
+              "name": "Awesome App",
+              "bundle": "com.app.awesome",
+              "domain": "awesomeapp.com",
+              "cat": [
+                "IAB22-1"
+              ],
+              "publisher": {
+                "id": "123456789"
+              }
+            },
+            "user": {
+              "buyeruid": "some-user"
+            },
+            "tmax": 500
+          },
+          "impIDs": [
+            "some-imp-id"
+          ]
+        },
+        "mockResponse": {
+          "status": 204,
+          "body": null
+        }
+      }
+    ],
+    "expectedBidResponses": []
+  }
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/fail-build-display-manager-version.json b/adapters/connatix/connatixtest/supplemental/fail-build-display-manager-version.json
new file mode 100644
index 00000000000..69ba22a6e80
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/fail-build-display-manager-version.json
@@ -0,0 +1,173 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "123.123.123.123",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 500,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "app": {
+        "publisher": {
+          "id": "123456789"
+        },
+        "cat": [
+          "IAB22-1"
+        ],
+        "bundle": "com.app.awesome",
+        "name": "Awesome App",
+        "domain": "awesomeapp.com",
+        "id": "123456789",
+        "ext": {
+          "prebid": {
+            "source": {}
+          }
+        }
+      },
+      "imp": [
+        {
+          "id": "some-imp-id",
+          "tagid": "some-tag-id",
+          "banner": {
+            "format":[
+              {
+                "w": 320,
+                "h": 50
+              }
+            ]
+          },
+          "displaymanagerver": "1.0.0",
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id"
+            }
+          }
+        }
+      ]
+    },
+    "httpCalls": [
+      {
+        "expectedRequest": {
+          "uri": "http://example.com",
+          "body": {
+            "id": "some-request-id",
+            "device": {
+              "ua": "test-user-agent",
+              "ip": "123.123.123.123",
+              "language": "en",
+              "dnt": 0
+            },
+            "imp": [
+              {
+                "id": "some-imp-id",
+                "tagid": "some-tag-id",
+                "banner": {
+                  "w": 320,
+                  "h": 50,
+                  "format": [
+                    {
+                      "w": 320,
+                      "h": 50
+                    }
+                  ]
+                },
+                "displaymanagerver": "1.0.0",
+                "ext": {
+                  "connatix": {
+                    "placementId": "some-placement-id"
+                  }
+                }
+              }
+            ],
+            "app": {
+              "id": "123456789",
+              "name": "Awesome App",
+              "bundle": "com.app.awesome",
+              "domain": "awesomeapp.com",
+              "cat": [
+                "IAB22-1"
+              ],
+              "publisher": {
+                "id": "123456789"
+              },
+              "ext": {
+                "prebid": {
+                  "source": {}
+                }
+              }
+            },
+            "user": {
+              "buyeruid": "some-user"
+            },
+            "tmax": 500
+          },
+          "impIDs": [
+            "some-imp-id"
+          ]
+        },
+        "mockResponse": {
+          "status": 200,
+          "body": {
+            "id": "test-response-id",
+            "seatbid": [
+              {
+                "bid": [
+                  {
+                    "id": "some-bid-id",
+                    "impid": "some-imp-id",
+                    "price": 0.52,
+                    "adm": "some-test-ad",
+                    "adomain": [
+                      "test.com"
+                    ],
+                    "crid": "112233",
+                    "w": 320,
+                    "h": 50,
+                    "ext": {
+                      "connatix": {
+                        "mediaType": "banner"
+                      }
+                    }
+                  }
+                ],
+                "seat": "connatix",
+                "group": 0
+              }
+            ],
+            "cur": "USD"
+          }
+        }
+      }
+    ],
+    "expectedBidResponses": [
+      {
+        "currency": "USD",
+        "bids": [
+          {
+            "bid": {
+              "id": "some-bid-id",
+              "impid": "some-imp-id",
+              "price": 0.52,
+              "adm": "some-test-ad",
+              "crid": "112233",
+              "adomain": [
+                "test.com"
+              ],
+              "w": 320,
+              "h": 50,
+              "ext": {
+                "connatix": {
+                  "mediaType": "banner"
+                }
+              }
+            },
+            "type": "banner"
+          }
+        ]
+      }
+    ]
+  }
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/fail-currency-conversion.json b/adapters/connatix/connatixtest/supplemental/fail-currency-conversion.json
new file mode 100644
index 00000000000..a2364eef6c5
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/fail-currency-conversion.json
@@ -0,0 +1,64 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "test-ip-v4",
+        "ipv6": "test-ip-v6",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 1000,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "site": {
+        "page": "test.com",
+        "publisher": {
+          "id": "123456789"
+        }
+      },
+      "imp": [
+        {
+          "id": "some-impression-id",
+          "tagid": "some-tag-id",
+          "video": {
+            "mimes": [
+              "video/mp4"
+            ],
+            "w": 640,
+            "h": 480,
+            "minduration": 120,
+            "maxduration": 150
+          },
+          "bidfloor": 1,
+          "bidfloorcur": "test",
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id"
+            }
+          }
+        }
+      ],
+      "ext": {
+        "prebid": {
+            "currency": {
+              "rates": {
+                "EUR": {
+                  "USD": 1.5
+                }
+              },
+              "usepbsrates": false
+            }
+        }
+      }
+    },
+    "httpCalls": [],
+    "expectedBidResponses": [],
+    "expectedMakeRequestsErrors": [
+        {
+            "value": "currency: tag is not well-formed",
+            "comparison": "literal"
+        }
+    ]
+  }
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/invalid-bid-response.json b/adapters/connatix/connatixtest/supplemental/invalid-bid-response.json
new file mode 100644
index 00000000000..9fd9b448de0
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/invalid-bid-response.json
@@ -0,0 +1,116 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "123.123.123.123",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 500,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "app": {
+        "publisher": {
+          "id": "123456789"
+        },
+        "cat": [
+          "IAB22-1"
+        ],
+        "bundle": "com.app.awesome",
+        "name": "Awesome App",
+        "domain": "awesomeapp.com",
+        "id": "123456789"
+      },
+      "imp": [
+        {
+          "id": "some-imp-id",
+          "tagid": "some-tag-id",
+          "banner": {
+            "format":[
+              {
+                "w": 320,
+                "h": 50
+              }
+            ]
+          },
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id"
+            }
+          }
+        }
+      ]
+    },
+    "httpCalls": [
+      {
+        "expectedRequest": {
+          "uri": "http://example.com",
+          "body": {
+            "id": "some-request-id",
+            "device": {
+              "ua": "test-user-agent",
+              "ip": "123.123.123.123",
+              "language": "en",
+              "dnt": 0
+            },
+            "imp": [
+              {
+                "id": "some-imp-id",
+                "tagid": "some-tag-id",
+                "banner": {
+                  "w": 320,
+                  "h": 50,
+                  "format": [
+                    {
+                      "w": 320,
+                      "h": 50
+                    }
+                  ]
+                },
+                "ext": {
+                  "connatix": {
+                    "placementId": "some-placement-id"
+                  }
+                }
+              }
+            ],
+            "app": {
+              "id": "123456789",
+              "name": "Awesome App",
+              "bundle": "com.app.awesome",
+              "domain": "awesomeapp.com",
+              "cat": [
+                "IAB22-1"
+              ],
+              "publisher": {
+                "id": "123456789"
+              }
+            },
+            "user": {
+              "buyeruid": "some-user"
+            },
+            "tmax": 500
+          },
+          "impIDs": [
+            "some-imp-id"
+          ]
+        },
+        "mockResponse": {
+          "status": 200,
+          "body": {
+            "id": "some-response-id",
+            "seatbid": {}
+          }
+        }
+      }
+    ],
+    "expectedBidResponses": [],
+    "expectedMakeBidsErrors": [
+        {
+            "value": "cannot unmarshal openrtb2.BidResponse.SeatBid: decode slice: expect [ or n, but found {",
+            "comparison": "literal"
+        }
+    ]
+  }
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/multi-imp-request.json b/adapters/connatix/connatixtest/supplemental/multi-imp-request.json
new file mode 100644
index 00000000000..08cf01fb8c6
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/multi-imp-request.json
@@ -0,0 +1,309 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "123.123.123.123",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 500,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "app": {
+        "publisher": {
+          "id": "123456789"
+        },
+        "cat": [
+          "IAB22-1"
+        ],
+        "bundle": "com.app.awesome",
+        "name": "Awesome App",
+        "domain": "awesomeapp.com",
+        "id": "123456789"
+      },
+      "imp": [
+        {
+          "id": "some-imp-id",
+          "tagid": "some-tag-id",
+          "banner": {
+            "format":[
+              {
+                "w": 320,
+                "h": 50
+              }
+            ]
+          },
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id1"
+            }
+          }
+        },
+        {
+            "id": "some-impression-id",
+            "tagid": "some-tag-id",
+            "video": {
+                "mimes": [
+                "video/mp4"
+                ],
+                "w": 640,
+                "h": 480,
+                "minduration": 120,
+                "maxduration": 150
+            },
+            "ext": {
+                "bidder": {
+                "placementId": "some-placement-id2"
+                }
+            }
+        },
+        {
+            "id": "some-invalid-impression",
+            "tagid": "some-tag-id",
+            "video": {
+              "mimes": [
+                "video/mp4"
+              ],
+              "w": 100,
+              "h": 100,
+              "minduration": 120,
+              "maxduration": 150
+            },
+            "ext": {
+              "bidder": {
+                "placementId": 1
+              }
+            }
+          }
+      ]
+    },
+    "httpCalls": [
+      {
+        "expectedRequest": {
+          "uri": "http://example.com",
+          "body": {
+            "id": "some-request-id",
+            "device": {
+              "ua": "test-user-agent",
+              "ip": "123.123.123.123",
+              "language": "en",
+              "dnt": 0
+            },
+            "imp": [
+              {
+                "id": "some-imp-id",
+                "tagid": "some-tag-id",
+                "banner": {
+                  "w": 320,
+                  "h": 50,
+                  "format": [
+                    {
+                      "w": 320,
+                      "h": 50
+                    }
+                  ]
+                },
+                "ext": {
+                  "connatix": {
+                    "placementId": "some-placement-id1"
+                  }
+                }
+              }
+            ],
+            "app": {
+              "id": "123456789",
+              "name": "Awesome App",
+              "bundle": "com.app.awesome",
+              "domain": "awesomeapp.com",
+              "cat": [
+                "IAB22-1"
+              ],
+              "publisher": {
+                "id": "123456789"
+              }
+            },
+            "user": {
+              "buyeruid": "some-user"
+            },
+            "tmax": 500
+          },
+          "impIDs": [
+            "some-imp-id"
+          ]
+        },
+        "mockResponse": {
+          "status": 200,
+          "body": {
+            "id": "test-response-id",
+            "seatbid": [
+              {
+                "bid": [
+                  {
+                    "id": "some-bid-id",
+                    "impid": "some-imp-id",
+                    "price": 0.52,
+                    "adm": "some-test-ad",
+                    "adomain": [
+                      "test.com"
+                    ],
+                    "crid": "112233",
+                    "w": 320,
+                    "h": 50,
+                    "ext": {
+                      "connatix": {
+                        "mediaType": "banner"
+                      }
+                    }
+                  }
+                ],
+                "seat": "connatix",
+                "group": 0
+              }
+            ],
+            "cur": "USD"
+          }
+        }
+      },
+      {
+        "expectedRequest": {
+          "uri": "http://example.com",
+          "body": {
+            "id": "some-request-id",
+            "device": {
+              "ua": "test-user-agent",
+              "ip": "123.123.123.123",
+              "language": "en",
+              "dnt": 0
+            },
+            "imp": [
+              {
+                "id": "some-impression-id",
+                "video": {
+                  "mimes": [
+                    "video/mp4"
+                  ],
+                  "minduration": 120,
+                  "maxduration": 150,
+                  "w": 640,
+                  "h": 480
+                },
+                "tagid": "some-tag-id",
+                "ext": {
+                  "connatix": {
+                    "placementId": "some-placement-id2"
+                  }
+                }
+              }
+            ],
+            "app": {
+              "id": "123456789",
+              "name": "Awesome App",
+              "bundle": "com.app.awesome",
+              "domain": "awesomeapp.com",
+              "cat": [
+                "IAB22-1"
+              ],
+              "publisher": {
+                "id": "123456789"
+              }
+            },
+            "user": {
+              "buyeruid": "some-user"
+            },
+            "tmax": 500
+          },
+          "impIDs":["some-impression-id"]
+        },
+        "mockResponse": {
+          "status": 200,
+          "body": {
+            "id": "some-response-id",
+            "seatbid": [
+              {
+                "bid": [
+                  {
+                    "id": "b3ae1b4e2fc24a4fb45540082e98e161",
+                    "impid": "some-impression-id",
+                    "price": 3.1,
+                    "adm": "some-test-vast-ad",
+                    "adomain": [
+                      "awesome.com"
+                    ],
+                    "crid": "112233",
+                    "w": 1280,
+                    "h": 720,
+                    "ext": {
+                      "connatix": {
+                        "mediaType": "video"
+                      }
+                    }
+                  }
+                ],
+                "seat": "connatix"
+              }
+            ],
+            "cur": "USD"
+          }
+        }
+      }
+    ],
+    "expectedBidResponses": [
+      {
+        "currency": "USD",
+        "bids": [
+          {
+            "bid": {
+              "id": "some-bid-id",
+              "impid": "some-imp-id",
+              "price": 0.52,
+              "adm": "some-test-ad",
+              "crid": "112233",
+              "adomain": [
+                "test.com"
+              ],
+              "w": 320,
+              "h": 50,
+              "ext": {
+                "connatix": {
+                  "mediaType": "banner"
+                }
+              }
+            },
+            "type": "banner"
+          }
+        ]
+      },
+      {
+        "bids":[
+          {
+            "bid":  {
+              "id": "b3ae1b4e2fc24a4fb45540082e98e161",
+              "impid": "some-impression-id",
+              "price": 3.1,
+              "adm": "some-test-vast-ad",
+              "crid": "112233",
+              "adomain": [
+                "awesome.com"
+              ],
+              "w": 1280,
+              "h": 720,
+              "ext": {
+                "connatix": {
+                  "mediaType": "video"
+                }
+              }
+            },
+            "type": "video"
+          }
+        ]
+      }
+    ],
+    "expectedMakeRequestsErrors": [
+        {
+            "value": "cannot unmarshal openrtb_ext.ExtImpConnatix.PlacementId: expects \" or n, but found 1",
+            "comparison": "literal"
+        }
+    ]
+  }
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/non-usd-currency-converted.json b/adapters/connatix/connatixtest/supplemental/non-usd-currency-converted.json
new file mode 100644
index 00000000000..9a37ce8f4ea
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/non-usd-currency-converted.json
@@ -0,0 +1,181 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "test-ip-v4",
+        "ipv6": "test-ip-v6",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 1000,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "site": {
+        "page": "test.com",
+        "publisher": {
+          "id": "123456789"
+        }
+      },
+      "imp": [
+        {
+          "id": "some-impression-id",
+          "tagid": "some-tag-id",
+          "video": {
+            "mimes": [
+              "video/mp4"
+            ],
+            "w": 640,
+            "h": 480,
+            "minduration": 120,
+            "maxduration": 150
+          },
+          "bidfloor": 1,
+          "bidfloorcur": "EUR",
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id"
+            }
+          }
+        }
+      ],
+      "ext": {
+        "prebid": {
+            "currency": {
+              "rates": {
+                "EUR": {
+                  "USD": 1.5
+                }
+              },
+              "usepbsrates": false
+            }
+        }
+      }
+    },
+    "httpCalls": [
+      {
+        "expectedRequest": {
+          "uri": "http://example.com",
+          "body": {
+            "id": "some-request-id",
+            "device": {
+              "ua": "test-user-agent",
+              "ip": "test-ip-v4",
+              "ipv6": "test-ip-v6",
+              "language": "en",
+              "dnt": 0
+            },
+            "imp": [
+            {
+                "bidfloorcur": "USD",
+                "bidfloor": 1.5,
+                "id": "some-impression-id",
+                "tagid": "some-tag-id",
+                "video": {
+                  "mimes": [
+                    "video/mp4"
+                  ],
+                  "minduration": 120,
+                  "maxduration": 150,
+                  "w": 640,
+                  "h": 480
+                },
+                "ext": {
+                  "connatix": {
+                    "placementId": "some-placement-id"
+                  }
+                }
+            }
+            ],
+            "site": {
+              "page": "test.com",
+              "publisher": {
+                "id": "123456789"
+              }
+            },
+            "user": {
+              "buyeruid": "some-user"
+            },
+            "ext": {
+                "prebid": {
+                    "currency": {
+                      "rates": {
+                        "EUR": {
+                          "USD": 1.5
+                        }
+                      },
+                      "usepbsrates": false
+                    }
+                }
+            },
+            "tmax": 1000
+          },
+          "headers": {
+            "Content-Type": ["application/json"],
+            "X-Forwarded-For": ["test-ip-v6", "test-ip-v4"],
+            "Accept": ["application/json"],
+            "User-Agent": ["test-user-agent"]
+          },
+          "impIDs":["some-impression-id"]
+        },
+        "mockResponse": {
+          "status": 200,
+          "body": {
+            "id": "some-response-id",
+            "seatbid": [
+              {
+                "bid": [
+                  {
+                    "id": "b3ae1b4e2fc24a4fb45540082e98e161",
+                    "impid": "some-impression-id",
+                    "price": 3.5,
+                    "adm": "some-test-vast-ad",
+                    "adomain": [
+                      "awesome.com"
+                    ],
+                    "crid": "112233",
+                    "w": 1280,
+                    "h": 720,
+                    "ext": {
+                      "connatix": {
+                        "mediaType": "video"
+                      }
+                    }
+                  }
+                ],
+                "seat": "connatix"
+              }
+            ],
+            "cur": "USD"
+          }
+        }
+      }
+    ],
+    "expectedBidResponses": [
+      {
+        "bids": [
+          {
+            "bid": {
+              "id": "b3ae1b4e2fc24a4fb45540082e98e161",
+              "impid": "some-impression-id",
+              "price": 3.5,
+              "adm": "some-test-vast-ad",
+              "adomain": [
+                "awesome.com"
+              ],
+              "crid": "112233",
+              "w": 1280,
+              "h": 720,
+              "ext": {
+                "connatix": {
+                  "mediaType": "video"
+                }
+              }
+            },
+            "type":"video"
+          }
+        ]
+      }
+    ]
+  }
\ No newline at end of file
diff --git a/adapters/connatix/connatixtest/supplemental/success-build-display-manager-version.json b/adapters/connatix/connatixtest/supplemental/success-build-display-manager-version.json
new file mode 100644
index 00000000000..7baffa28ac7
--- /dev/null
+++ b/adapters/connatix/connatixtest/supplemental/success-build-display-manager-version.json
@@ -0,0 +1,174 @@
+{
+    "mockBidRequest": {
+      "id": "some-request-id",
+      "device": {
+        "ua": "test-user-agent",
+        "ip": "123.123.123.123",
+        "language": "en",
+        "dnt": 0
+      },
+      "tmax": 500,
+      "user": {
+        "buyeruid": "some-user"
+      },
+      "app": {
+        "publisher": {
+          "id": "123456789"
+        },
+        "cat": [
+          "IAB22-1"
+        ],
+        "bundle": "com.app.awesome",
+        "name": "Awesome App",
+        "domain": "awesomeapp.com",
+        "id": "123456789",
+        "ext": {
+          "prebid": {
+            "source": "test",
+            "version": "1.0.0"
+          }
+        }
+      },
+      "imp": [
+        {
+          "id": "some-imp-id",
+          "tagid": "some-tag-id",
+          "banner": {
+            "format":[
+              {
+                "w": 320,
+                "h": 50
+              }
+            ]
+          },
+          "ext": {
+            "bidder": {
+              "placementId": "some-placement-id"
+            }
+          }
+        }
+      ]
+    },
+    "httpCalls": [
+      {
+        "expectedRequest": {
+          "uri": "http://example.com",
+          "body": {
+            "id": "some-request-id",
+            "device": {
+              "ua": "test-user-agent",
+              "ip": "123.123.123.123",
+              "language": "en",
+              "dnt": 0
+            },
+            "imp": [
+              {
+                "id": "some-imp-id",
+                "tagid": "some-tag-id",
+                "banner": {
+                  "w": 320,
+                  "h": 50,
+                  "format": [
+                    {
+                      "w": 320,
+                      "h": 50
+                    }
+                  ]
+                },
+                "displaymanagerver": "test-1.0.0",
+                "ext": {
+                  "connatix": {
+                    "placementId": "some-placement-id"
+                  }
+                }
+              }
+            ],
+            "app": {
+              "id": "123456789",
+              "name": "Awesome App",
+              "bundle": "com.app.awesome",
+              "domain": "awesomeapp.com",
+              "cat": [
+                "IAB22-1"
+              ],
+              "publisher": {
+                "id": "123456789"
+              },
+              "ext": {
+                "prebid": {
+                  "source": "test",
+                  "version": "1.0.0"
+                }
+              }
+            },
+            "user": {
+              "buyeruid": "some-user"
+            },
+            "tmax": 500
+          },
+          "impIDs": [
+            "some-imp-id"
+          ]
+        },
+        "mockResponse": {
+          "status": 200,
+          "body": {
+            "id": "test-response-id",
+            "seatbid": [
+              {
+                "bid": [
+                  {
+                    "id": "some-bid-id",
+                    "impid": "some-imp-id",
+                    "price": 0.52,
+                    "adm": "some-test-ad",
+                    "adomain": [
+                      "test.com"
+                    ],
+                    "crid": "112233",
+                    "w": 320,
+                    "h": 50,
+                    "ext": {
+                      "connatix": {
+                        "mediaType": "banner"
+                      }
+                    }
+                  }
+                ],
+                "seat": "connatix",
+                "group": 0
+              }
+            ],
+            "cur": "USD"
+          }
+        }
+      }
+    ],
+    "expectedBidResponses": [
+      {
+        "currency": "USD",
+        "bids": [
+          {
+            "bid": {
+              "id": "some-bid-id",
+              "impid": "some-imp-id",
+              "price": 0.52,
+              "adm": "some-test-ad",
+              "crid": "112233",
+              "adomain": [
+                "test.com"
+              ],
+              "w": 320,
+              "h": 50,
+              "ext": {
+                "connatix": {
+                  "mediaType": "banner"
+                }
+              }
+            },
+            "type": "banner"
+          }
+        ]
+      }
+    ]
+  }
\ No newline at end of file
diff --git a/adapters/connatix/models.go b/adapters/connatix/models.go
new file mode 100644
index 00000000000..55d475f9638
--- /dev/null
+++ b/adapters/connatix/models.go
@@ -0,0 +1,29 @@
+package connatix
+
+import (
+	"github.com/prebid/prebid-server/v3/openrtb_ext"
+)
+
+type adapter struct {
+	endpoint string
+}
+
+type impExtIncoming struct {
+	Bidder openrtb_ext.ExtImpConnatix `json:"bidder"`
+}
+
+type impExt struct {
+	Connatix impExtConnatix `json:"connatix"`
+}
+
+type impExtConnatix struct {
+	PlacementId string `json:"placementId,omitempty"`
+}
+
+type bidExt struct {
+	Cnx bidCnxExt `json:"connatix,omitempty"`
+}
+
+type bidCnxExt struct {
+	MediaType string `json:"mediaType,omitempty"`
+}
diff --git a/adapters/connatix/params_test.go b/adapters/connatix/params_test.go
new file mode 100644
index 00000000000..254f660c1ba
--- /dev/null
+++ b/adapters/connatix/params_test.go
@@ -0,0 +1,58 @@
+package connatix
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/prebid/prebid-server/v3/openrtb_ext"
+)
+
+// This file actually intends to test static/bidder-params/connatix.json
+//
+// These also validate the format of the external API: request.imp[i].ext.prebid.bidder.connatix
+
+// TestValidParams makes sure that the Connatix schema accepts all imp.ext fields which we intend to support.
+func TestValidParams(t *testing.T) {
+	validator, err := openrtb_ext.NewBidderParamsValidator("../../static/bidder-params")
+	if err != nil {
+		t.Fatalf("Failed to fetch the json-schemas. %v", err)
+	}
+
+	for _, validParam := range validParams {
+		if err := validator.Validate(openrtb_ext.BidderConnatix, json.RawMessage(validParam)); err != nil {
+			t.Errorf("Schema rejected Connatix params: %s", validParam)
+		}
+	}
+}
+
+// TestInvalidParams makes sure that the Connatix schema rejects all the imp.ext fields we don't support.
+func TestInvalidParams(t *testing.T) {
+	validator, err := openrtb_ext.NewBidderParamsValidator("../../static/bidder-params")
+	if err != nil {
+		t.Fatalf("Failed to fetch the json-schemas. %v", err)
+	}
+
+	for _, invalidParam := range invalidParams {
+		if err := validator.Validate(openrtb_ext.BidderConnatix, json.RawMessage(invalidParam)); err == nil {
+			t.Errorf("Schema allowed unexpected params: %s", invalidParam)
+		}
+	}
+}
+
+var validParams = []string{
+	`{"placementId": "test"}`,
+	`{"placementId": "test1"}`,
+	`{"placementId": "test-1-test"}`,
+}
+
+var invalidParams = []string{
+	``,
+	`null`,
+	`true`,
+	`5`,
+	`4.2`,
+	`[]`,
+	`{}`,
+	`{"adCode": "string", "seatCode": 5, "originalPublisherid": "string"}`,
+	`{  "placementId": "" }`,
+}
diff --git a/exchange/adapter_builders.go b/exchange/adapter_builders.go
index 97a03dde2a5..e14b8868243 100755
--- a/exchange/adapter_builders.go
+++ b/exchange/adapter_builders.go
@@ -72,6 +72,7 @@ import (
 	"github.com/prebid/prebid-server/v3/adapters/colossus"
 	"github.com/prebid/prebid-server/v3/adapters/compass"
 	"github.com/prebid/prebid-server/v3/adapters/concert"
+	"github.com/prebid/prebid-server/v3/adapters/connatix"
 	"github.com/prebid/prebid-server/v3/adapters/connectad"
 	"github.com/prebid/prebid-server/v3/adapters/consumable"
 	"github.com/prebid/prebid-server/v3/adapters/conversant"
@@ -302,6 +303,7 @@ func newAdapterBuilders() map[openrtb_ext.BidderName]adapters.Builder {
 		openrtb_ext.BidderColossus:          colossus.Builder,
 		openrtb_ext.BidderCompass:           compass.Builder,
 		openrtb_ext.BidderConcert:           concert.Builder,
+		openrtb_ext.BidderConnatix:          connatix.Builder,
 		openrtb_ext.BidderConnectAd:         connectad.Builder,
 		openrtb_ext.BidderConsumable:        consumable.Builder,
 		openrtb_ext.BidderConversant:        conversant.Builder,
diff --git a/openrtb_ext/bidders.go b/openrtb_ext/bidders.go
index fd7893a5a5e..5bceb3befa9 100644
--- a/openrtb_ext/bidders.go
+++ b/openrtb_ext/bidders.go
@@ -88,6 +88,7 @@ var coreBidderNames []BidderName = []BidderName{
 	BidderColossus,
 	BidderCompass,
 	BidderConcert,
+	BidderConnatix,
 	BidderConnectAd,
 	BidderConsumable,
 	BidderConversant,
@@ -425,6 +426,7 @@ const (
 	BidderColossus          BidderName = "colossus"
 	BidderCompass           BidderName = "compass"
 	BidderConcert           BidderName = "concert"
+	BidderConnatix          BidderName = "connatix"
 	BidderConnectAd         BidderName = "connectad"
 	BidderConsumable        BidderName = "consumable"
 	BidderConversant        BidderName = "conversant"
diff --git a/openrtb_ext/imp_connatix.go b/openrtb_ext/imp_connatix.go
new file mode 100644
index 00000000000..18d7a713237
--- /dev/null
+++ b/openrtb_ext/imp_connatix.go
@@ -0,0 +1,5 @@
+package openrtb_ext
+
+type ExtImpConnatix struct {
+	PlacementId string `json:"placementId"`
+}
diff --git a/static/bidder-info/connatix.yaml b/static/bidder-info/connatix.yaml
new file mode 100644
index 00000000000..b9b94301356
--- /dev/null
+++ b/static/bidder-info/connatix.yaml
@@ -0,0 +1,20 @@
+endpoint: "https://capi.connatix.com/rtb/ortb"
+maintainer:
+  email: "pubsolutions@connatix.com"
+gvlVendorID: 143
+capabilities:
+  app:
+    mediaTypes:
+      - banner
+      - video
+  site:
+    mediaTypes:
+      - banner
+      - video
+userSync:
+  iframe:
+    url: "https://capi.connatix.com/us/pixel?pId=53&gdpr={{.GDPR}}&gdpr_consent={{.GDPRConsent}}&us_privacy={{.USPrivacy}}&callback={{.RedirectURL}}"
+    userMacro: "[UID]"
+  redirect:
+    url: "https://capi.connatix.com/us/pixel?pId=52&gdpr={{.GDPR}}&gdpr_consent={{.GDPRConsent}}&us_privacy={{.USPrivacy}}&callback={{.RedirectURL}}"
+    userMacro: "[UID]"
diff --git a/static/bidder-params/connatix.json b/static/bidder-params/connatix.json
new file mode 100644
index 00000000000..4003b0583b1
--- /dev/null
+++ b/static/bidder-params/connatix.json
@@ -0,0 +1,14 @@
+{
+    "$schema": "http://json-schema.org/draft-04/schema#",
+    "title": "Connatix Adapter Params",
+    "description": "A schema which validates params accepted by the Connatix adapter",
+    "type": "object",
+    "properties": {
+      "placementId": {
+        "type": "string",
+        "minLength": 1,
+        "description": "Placement ID"
+      }
+    },
+    "required": ["placementId"]
+  }
\ No newline at end of file