diff --git a/apps/devtool/src/app/data-store/_components/DataStoreConfig.tsx b/apps/devtool/src/app/data-store/_components/DataStoreConfig.tsx
index 295e4ff82..78a35da39 100644
--- a/apps/devtool/src/app/data-store/_components/DataStoreConfig.tsx
+++ b/apps/devtool/src/app/data-store/_components/DataStoreConfig.tsx
@@ -33,7 +33,7 @@ const DataStoreConfig = () => {
     useDataStoreApi()
 
   const [codeEditor, setCodeEditor] = useState<string>()
-  const [displayCodeEditor, setDisplayCodeEditor] = useState(false)
+  const [displayCodeEditor, setDisplayCodeEditor] = useState(true)
   const [isDialogOpen, setIsDialogOpen] = useState(false)
 
   useEffect(() => {
diff --git a/apps/devtool/src/app/request-playground/_components/PlaygroundEditor.tsx b/apps/devtool/src/app/request-playground/_components/PlaygroundEditor.tsx
index 673f6ba9f..ab8f403c6 100644
--- a/apps/devtool/src/app/request-playground/_components/PlaygroundEditor.tsx
+++ b/apps/devtool/src/app/request-playground/_components/PlaygroundEditor.tsx
@@ -12,7 +12,7 @@ import { FontAwesomeIcon } from '@fortawesome/react-fontawesome'
 import { Editor } from '@monaco-editor/react'
 import { Decision, EvaluationResponse } from '@narval/policy-engine-shared'
 import { hash } from '@narval/signature'
-import axios from 'axios'
+import axios, { AxiosError } from 'axios'
 import { useMemo, useRef, useState } from 'react'
 import NarButton from '../../_design-system/NarButton'
 import useAccountSignature from '../../_hooks/useAccountSignature'
@@ -22,27 +22,30 @@ import example from './example.json'
 const PlaygroundEditor = () => {
   const { engineUrl, engineClientId, engineClientSecret, vaultUrl, vaultClientId } = useStore()
   const { jwk, signAccountJwsd, signAccountJwt } = useAccountSignature()
-  const [data, setData] = useState<string | undefined>(JSON.stringify(example, null, 2))
+  const [codeEditor, setCodeEditor] = useState<string | undefined>(JSON.stringify(example, null, 2))
   const [isProcessing, setIsProcessing] = useState<boolean>(false)
   const [evaluationResponse, setEvaluationResponse] = useState<EvaluationResponse>()
   const [signature, setSignature] = useState<string>()
+  const [error, setError] = useState<string>()
 
   const editorRef = useRef<any>(null)
   const monacoRef = useRef<any>(null)
 
   const canBeSigned = useMemo(() => {
+    if (!codeEditor || !evaluationResponse) return false
+
     try {
-      const transactionRequest = JSON.parse(data || '{}')
-      return transactionRequest?.authentication && evaluationResponse?.decision === Decision.PERMIT
+      const transactionRequest = JSON.parse(codeEditor)
+      return transactionRequest.authentication && evaluationResponse.decision === Decision.PERMIT
     } catch (error) {
       return false
     }
-  }, [data, evaluationResponse])
+  }, [codeEditor, evaluationResponse])
 
   const getApprovalSignature = async () => {
-    if (!data) return
+    if (!codeEditor) return
 
-    const transactionRequest = JSON.parse(data)
+    const transactionRequest = JSON.parse(codeEditor)
 
     const payload = {
       iss: 'fe723044-35df-4e99-9739-122a48d4ab96',
@@ -56,12 +59,15 @@ const PlaygroundEditor = () => {
   }
 
   const sendEvaluation = async () => {
-    if (!data || !jwk) return
+    if (!codeEditor || !jwk) return
 
     setIsProcessing(true)
+    setEvaluationResponse(undefined)
+    setSignature(undefined)
+    setError(undefined)
 
     try {
-      const transactionRequest = JSON.parse(data)
+      const transactionRequest = JSON.parse(codeEditor)
 
       const payload = {
         iss: 'fe723044-35df-4e99-9739-122a48d4ab96',
@@ -82,7 +88,7 @@ const PlaygroundEditor = () => {
         }
       )
 
-      setData(
+      setCodeEditor(
         JSON.stringify(
           {
             ...transactionRequest,
@@ -93,8 +99,10 @@ const PlaygroundEditor = () => {
         )
       )
       setEvaluationResponse(evaluation.data)
-    } catch (error) {
-      console.log(error)
+    } catch (err) {
+      const error = err as AxiosError
+      const errorData = error.response?.data as any
+      setError(errorData?.message || error.message)
     }
 
     setIsProcessing(false)
@@ -107,6 +115,10 @@ const PlaygroundEditor = () => {
 
     if (!accessToken?.value || !request) return
 
+    setEvaluationResponse(undefined)
+    setSignature(undefined)
+    setError(undefined)
+
     try {
       const bodyPayload = { request }
 
@@ -135,8 +147,8 @@ const PlaygroundEditor = () => {
         <Editor
           height="70vh"
           language="json"
-          value={data}
-          onChange={(value) => setData(value)}
+          value={codeEditor}
+          onChange={(value) => setCodeEditor(value)}
           onMount={(editor, monaco) => {
             editorRef.current = editor
             monacoRef.current = monaco
@@ -157,8 +169,10 @@ const PlaygroundEditor = () => {
             onClick={signRequest}
             disabled={isProcessing || !canBeSigned}
           />
-          <NarButton label="Approve" leftIcon={<FontAwesomeIcon icon={faCheck} />} onClick={getApprovalSignature} />
-          {!isProcessing && evaluationResponse && (
+          {false && (
+            <NarButton label="Approve" leftIcon={<FontAwesomeIcon icon={faCheck} />} onClick={getApprovalSignature} />
+          )}
+          {!isProcessing && !error && evaluationResponse && (
             <div className="flex items-center gap-2">
               {evaluationResponse.decision === Decision.PERMIT && (
                 <FontAwesomeIcon icon={faCheckCircle} className="text-nv-green-500" />
@@ -173,12 +187,13 @@ const PlaygroundEditor = () => {
             </div>
           )}
         </div>
-        {!isProcessing && evaluationResponse && (
+        {!isProcessing && error && <div className="text-nv-red-500 truncate">{error}</div>}
+        {!isProcessing && !error && evaluationResponse && (
           <div className="border-2 border-white rounded-t-xl p-4 overflow-auto">
             <pre>{JSON.stringify(evaluationResponse, null, 3)}</pre>
           </div>
         )}
-        {!isProcessing && signature && <div className="text-nv-white truncate">{signature}</div>}
+        {!isProcessing && !error && signature && <div className="text-nv-white truncate">{signature}</div>}
       </div>
     </div>
   )
diff --git a/apps/devtool/src/app/request-playground/_components/accumulation.json b/apps/devtool/src/app/request-playground/_components/accumulation.json
index e69de29bb..cc4d64260 100644
--- a/apps/devtool/src/app/request-playground/_components/accumulation.json
+++ b/apps/devtool/src/app/request-playground/_components/accumulation.json
@@ -0,0 +1,40 @@
+{
+  "request": {
+    "resourceId": "eip155:eoa:0x494042504a8148a6d00ab10ed26043f5579ce00f",
+    "action": "signTransaction",
+    "nonce": "6bb2b3e9-fa8a-4081-a837-575184ceb3a5",
+    "transactionRequest": {
+      "from": "0xed123cf8e3ba51c6c15da1eac74b2b5deea31448",
+      "to": "0x031d8c0ca142921c459bcb28104c0ff37928f9ed",
+      "value": "0xde0b6b3a7640000",
+      "chainId": 137,
+      "type": "2"
+    }
+  },
+  "feeds": [
+    {
+      "source": "armory/price-feed",
+      "sig": "eyJhbGciOiJFSVAxOTEiLCJraWQiOiIweDlENDMyYTA5Q0JmNTVGMjJBYTZhMkUyOTBhY0IxMkQ1N2QyOUIyRmMiLCJ0eXAiOiJKV1QifQ.eyJpc3MiOiJmZTcyMzA0NC0zNWRmLTRlOTktOTczOS0xMjJhNDhkNGFiOTYiLCJyZXF1ZXN0SGFzaCI6IjB4ZjdmY2MyMzRhMTMzNWNmNGE0NDE0MzAwNWJhOWJhNWQyY2VlMTJhMmZmZDFlNDMyYTU4Yjc5YjllNzcyYzk5NiIsInN1YiI6ImVpcDE1NTplb2E6MHg0OTQwNDI1MDRhODE0OGE2ZDAwYWIxMGVkMjYwNDNmNTU3OWNlMDBmIn0.BxgEr9TILTIocaNpQs-59vKhBSePpS-q0D4VWfVpqIs0bRSBp8vBMHkKa7AxdtfMwRCBd86vldj-1Ebb5UtmMhs",
+      "data": {
+        "eip155:137/slip44:966": {
+          "fiat:usd": "0.99",
+          "fiat:eur": "1.10"
+        }
+      }
+    },
+    {
+      "source": "armory/historical-transfer-feed",
+      "sig": "eyJhbGciOiJFSVAxOTEiLCJraWQiOiIweDlENDMyYTA5Q0JmNTVGMjJBYTZhMkUyOTBhY0IxMkQ1N2QyOUIyRmMiLCJ0eXAiOiJKV1QifQ.eyJpc3MiOiJmZTcyMzA0NC0zNWRmLTRlOTktOTczOS0xMjJhNDhkNGFiOTYiLCJyZXF1ZXN0SGFzaCI6IjB4ZjdmY2MyMzRhMTMzNWNmNGE0NDE0MzAwNWJhOWJhNWQyY2VlMTJhMmZmZDFlNDMyYTU4Yjc5YjllNzcyYzk5NiIsInN1YiI6ImVpcDE1NTplb2E6MHg0OTQwNDI1MDRhODE0OGE2ZDAwYWIxMGVkMjYwNDNmNTU3OWNlMDBmIn0.BxgEr9TILTIocaNpQs-59vKhBSePpS-q0D4VWfVpqIs0bRSBp8vBMHkKa7AxdtfMwRCBd86vldj-1Ebb5UtmMhs",
+      "data": [
+        {
+          "amount": "500000000000000000",
+          "from": "eip155:eoa:0x494042504a8148a6d00ab10ed26043f5579ce00f",
+          "token": "eip155:137/slip44:966",
+          "rates": { "fiat:usd": "0.90", "fiat:eur": "1.10" },
+          "chainId": 137,
+          "initiatedBy": "61e775a9-5f68-41ab-a775-5806845e6e72"
+        }
+      ]
+    }
+  ]
+}
diff --git a/apps/policy-engine/src/open-policy-agent/core/type/open-policy-agent.type.ts b/apps/policy-engine/src/open-policy-agent/core/type/open-policy-agent.type.ts
index 980f52663..1da76877a 100644
--- a/apps/policy-engine/src/open-policy-agent/core/type/open-policy-agent.type.ts
+++ b/apps/policy-engine/src/open-policy-agent/core/type/open-policy-agent.type.ts
@@ -4,6 +4,7 @@ import {
   Action,
   Address,
   CredentialEntity,
+  Feed,
   HistoricalTransfer,
   TransactionRequest,
   UserRole
@@ -25,6 +26,7 @@ export type Input = {
   resource?: { uid: string }
   approvals?: CredentialEntity[]
   transfers?: HistoricalTransfer[]
+  feeds?: Feed<unknown>[]
 }
 
 // TODO: (@wcalderipe, 18/03/24) Check with @samteb how can we replace these
diff --git a/apps/policy-engine/src/open-policy-agent/core/util/evaluation.util.ts b/apps/policy-engine/src/open-policy-agent/core/util/evaluation.util.ts
index 1d31025f8..d95736655 100644
--- a/apps/policy-engine/src/open-policy-agent/core/util/evaluation.util.ts
+++ b/apps/policy-engine/src/open-policy-agent/core/util/evaluation.util.ts
@@ -3,6 +3,7 @@ import {
   CredentialEntity,
   Entities,
   EvaluationRequest,
+  Feed,
   Request,
   SignMessageAction,
   SignRawAction,
@@ -15,9 +16,14 @@ import { indexBy } from 'lodash/fp'
 import { OpenPolicyAgentException } from '../exception/open-policy-agent.exception'
 import { Data, Input, UserGroup, WalletGroup } from '../type/open-policy-agent.type'
 
-type Mapping<R extends Request> = (request: R, principal: CredentialEntity, approvals?: CredentialEntity[]) => Input
+type Mapping<R extends Request> = (
+  request: R,
+  principal: CredentialEntity,
+  approvals?: CredentialEntity[],
+  feeds?: Feed<unknown>[]
+) => Input
 
-const toSignTransaction: Mapping<SignTransactionAction> = (request, principal, approvals): Input => {
+const toSignTransaction: Mapping<SignTransactionAction> = (request, principal, approvals, feeds): Input => {
   const result = safeDecode({
     input: {
       type: InputType.TRANSACTION_REQUEST,
@@ -32,7 +38,8 @@ const toSignTransaction: Mapping<SignTransactionAction> = (request, principal, a
       approvals,
       intent: result.intent,
       transactionRequest: request.transactionRequest,
-      resource: { uid: request.resourceId }
+      resource: { uid: request.resourceId },
+      feeds
     }
   }
 
@@ -105,8 +112,25 @@ export const toInput = (params: {
   ])
   const mapper = mappers.get(action)
 
+  // For demo purpose, we need to modify timestamps of transaction
+  // and fake it that those happened in the last 24hours
+
+  // const feedsDemo = evaluation.feeds?.map((feed) => {
+  //   if (feed.source === 'armory/historical-transfer-feed') {
+  //     const { data, ...res } = feed
+  //     const dataRes = (data as any[]).map((d: any) => ({
+  //       ...d,
+  //       timestamp: new Date().getTime() - 10 * 60 * 60 * 1000
+  //     }))
+
+  //     return { ...res, data: dataRes }
+  //   }
+
+  //   return feed
+  // }) as Feed<unknown>[]
+
   if (mapper) {
-    return mapper(evaluation.request, params.principal, params.approvals)
+    return mapper(evaluation.request, params.principal, params.approvals, evaluation.feeds)
   }
 
   throw new OpenPolicyAgentException({
diff --git a/packages/policy-engine-shared/src/lib/type/domain.type.ts b/packages/policy-engine-shared/src/lib/type/domain.type.ts
index 4a7d20397..c5175469a 100644
--- a/packages/policy-engine-shared/src/lib/type/domain.type.ts
+++ b/packages/policy-engine-shared/src/lib/type/domain.type.ts
@@ -96,7 +96,7 @@ export const Feed = <Data extends ZodTypeAny>(dataSchema: Data) =>
   z.object({
     source: z.string(),
     sig: JwtString.nullable(),
-    data: dataSchema
+    data: dataSchema.optional()
   })
 
 /**
@@ -116,7 +116,7 @@ export type Feed<Data> = {
    * any trusted data sources if they prefer.
    */
   sig: JwtString | null
-  data: Data
+  data?: Data
 }
 
 export const EvaluationRequest = z