diff --git a/src/data/types.ts b/src/data/types.ts
index d18c4299..215bd082 100644
--- a/src/data/types.ts
+++ b/src/data/types.ts
@@ -43,9 +43,9 @@ export type PineconeConfiguration = {
   additionalHeaders?: HTTPHeaders;
 
   /**
-   * Optional integration id that is applied to the User-Agent header with all requests.
+   * Optional sourceTag that is applied to the User-Agent header with all requests.
    */
-  integrationId?: string;
+  sourceTag?: string;
 };
 
 export const RecordIdSchema = Type.String({ minLength: 1 });
diff --git a/src/utils/__tests__/user-agent.test.ts b/src/utils/__tests__/user-agent.test.ts
index b167eb03..20aa63ce 100644
--- a/src/utils/__tests__/user-agent.test.ts
+++ b/src/utils/__tests__/user-agent.test.ts
@@ -1,22 +1,47 @@
 import { buildUserAgent } from '../user-agent';
 import * as EnvironmentModule from '../environment';
 
-describe('buildUserAgent', () => {
-  test('applies Edge Runtime when running in an edge environment', () => {
-    jest.spyOn(EnvironmentModule, 'isEdge').mockReturnValue(true);
-    const config = { apiKey: 'test-api-key' };
-    const userAgent = buildUserAgent(config);
+describe('user-agent', () => {
+  describe('buildUserAgent', () => {
+    test('applies Edge Runtime when running in an edge environment', () => {
+      jest.spyOn(EnvironmentModule, 'isEdge').mockReturnValue(true);
+      const config = { apiKey: 'test-api-key' };
+      const userAgent = buildUserAgent(config);
 
-    expect(userAgent).toContain('Edge Runtime');
+      expect(userAgent).toContain('Edge Runtime');
+    });
+
+    test('applies source_tag when provided via PineconeConfiguration', () => {
+      const config = {
+        apiKey: 'test-api-key',
+        sourceTag: 'test source tag',
+      };
+
+      const userAgent = buildUserAgent(config);
+      expect(userAgent).toContain('source_tag=test_source_tag');
+    });
   });
 
-  test('applies integrationId when provided via PineconeConfiguration', () => {
-    const config = {
-      apiKey: 'test-api-key',
-      integrationId: 'test-integration-id',
-    };
+  describe('normalizeSourceTag', () => {
+    test('normalizes variations of sourceTag', () => {
+      const config = {
+        apiKey: 'test-api-key',
+        sourceTag: 'my source tag!!!',
+      };
+      let userAgent = buildUserAgent(config);
+      expect(userAgent).toContain('source_tag=my_source_tag');
+
+      config.sourceTag = 'My Source Tag';
+      userAgent = buildUserAgent(config);
+      expect(userAgent).toContain('source_tag=my_source_tag');
+
+      config.sourceTag = '   My   Source    Tag       123    ';
+      userAgent = buildUserAgent(config);
+      expect(userAgent).toContain('source_tag=my_source_tag_123');
 
-    const userAgent = buildUserAgent(config);
-    expect(userAgent).toContain('integrationId=test-integration-id');
+      config.sourceTag = '  MY SOURCE TAG     1234     ##### !!!!!!';
+      userAgent = buildUserAgent(config);
+      expect(userAgent).toContain('source_tag=my_source_tag_1234');
+    });
   });
 });
diff --git a/src/utils/user-agent.ts b/src/utils/user-agent.ts
index e39b2356..82c08458 100644
--- a/src/utils/user-agent.ts
+++ b/src/utils/user-agent.ts
@@ -20,9 +20,28 @@ export const buildUserAgent = (config: PineconeConfiguration) => {
     userAgentParts.push(`node ${process.version}`);
   }
 
-  if (config.integrationId) {
-    userAgentParts.push(`integrationId=${config.integrationId}`);
+  if (config.sourceTag) {
+    userAgentParts.push(`source_tag=${normalizeSourceTag(config.sourceTag)}`);
   }
 
   return userAgentParts.join('; ');
 };
+
+const normalizeSourceTag = (sourceTag: string) => {
+  if (!sourceTag) {
+    return;
+  }
+
+  /**
+   * normalize sourceTag
+   * 1. Lowercase
+   * 2. Limit charset to [a-z0-9_ ]
+   * 3. Trim left/right spaces
+   * 4. Condense multiple spaces to one, and replace with underscore
+   */
+  return sourceTag
+    .toLowerCase()
+    .replace(/[^a-z0-9_ ]/g, '')
+    .trim()
+    .replace(/[ ]+/g, '_');
+};