diff --git a/.github/workflows/deploy-cloud-run-production.yml b/.github/workflows/deploy-cloud-run-production.yml
index ce518e7ea..050239aaf 100644
--- a/.github/workflows/deploy-cloud-run-production.yml
+++ b/.github/workflows/deploy-cloud-run-production.yml
@@ -121,7 +121,8 @@ jobs:
             --set-env-vars "API_KEY_SECRET=${{ secrets.API_KEY_SECRET_PRODUCTION }}" \
             --set-env-vars "SENTRY_DSN=${{ secrets.SENTRY_DSN_PRODUCTION }}" \
             --set-env-vars "ADMIN_API_KEY=${{ secrets.ADMIN_API_KEY_PRODUCTION }}" \
-            --set-env-vars "POSTHOG_API_KEY=${{ secrets.POSTHOG_API_KEY_PRODUCTION }}" \
+            --set-env-vars "POSTHOG_PROJECT_TOKEN=${{ secrets.POSTHOG_PROJECT_TOKEN }}" \
+            --set-env-vars "POSTHOG_HOST=https://us.i.posthog.com" \
             --memory 1Gi \
             --cpu 2 \
             --min-instances 2 \
diff --git a/.github/workflows/deploy-cloud-run-staging.yml b/.github/workflows/deploy-cloud-run-staging.yml
index a52d5db22..15fbdb96f 100644
--- a/.github/workflows/deploy-cloud-run-staging.yml
+++ b/.github/workflows/deploy-cloud-run-staging.yml
@@ -119,7 +119,8 @@ jobs:
             --set-env-vars "REDIS_URL=${{ secrets.REDIS_STAGING_URL }}" \
             --set-env-vars "API_KEY_SECRET=${{ secrets.API_KEY_SECRET_STAGING }}" \
             --set-env-vars "SENTRY_DSN=${{ secrets.SENTRY_DSN_STAGING }}" \
-            --set-env-vars "POSTHOG_API_KEY=${{ secrets.POSTHOG_API_KEY_PRODUCTION }}" \
+            --set-env-vars "POSTHOG_PROJECT_TOKEN=${{ secrets.POSTHOG_PROJECT_TOKEN }}" \
+            --set-env-vars "POSTHOG_HOST=https://us.i.posthog.com" \
             --port 8000 \
             --memory 1Gi \
             --cpu 2 \
diff --git a/.github/workflows/fix-secret-manager-iam.yml b/.github/workflows/fix-secret-manager-iam.yml
index cd08faf71..cb6061334 100644
--- a/.github/workflows/fix-secret-manager-iam.yml
+++ b/.github/workflows/fix-secret-manager-iam.yml
@@ -31,7 +31,7 @@ jobs:
             --role="roles/secretmanager.secretAccessor" \
             --project=gaia-calendar-488606 \
             2>/dev/null || echo "Secret may not exist yet, will be created during deploy"
-          gcloud secrets add-iam-policy-binding buywhere-posthog-api-key \
+          gcloud secrets add-iam-policy-binding buywhere-posthog-project-token \
             --member="serviceAccount:${{ env.CLOUD_RUN_SA }}" \
             --role="roles/secretmanager.secretAccessor" \
             --project=gaia-calendar-488606 \
diff --git a/api/src/analytics/posthog.ts b/api/src/analytics/posthog.ts
index 6705dd3be..a7dc37482 100644
--- a/api/src/analytics/posthog.ts
+++ b/api/src/analytics/posthog.ts
@@ -1,18 +1,37 @@
 import { PostHog } from 'posthog-node';
 
-const POSTHOG_API_KEY = process.env.POSTHOG_API_KEY || '';
-const POSTHOG_HOST = process.env.POSTHOG_HOST || 'https://app.posthog.com';
+const POSTHOG_PROJECT_TOKEN = process.env.POSTHOG_PROJECT_TOKEN || '';
+const POSTHOG_HOST = process.env.POSTHOG_HOST || 'https://us.i.posthog.com';
 
 let client: PostHog | null = null;
 
 function getClient(): PostHog | null {
-  if (!POSTHOG_API_KEY) return null;
+  if (!POSTHOG_PROJECT_TOKEN) return null;
   if (!client) {
-    client = new PostHog(POSTHOG_API_KEY, { host: POSTHOG_HOST });
+    client = new PostHog(POSTHOG_PROJECT_TOKEN, { host: POSTHOG_HOST });
   }
   return client;
 }
 
+export async function getFeatureFlag(key: string, distinctId: string): Promise<string | boolean | undefined> {
+  const ph = getClient();
+  if (!ph) return undefined;
+  return ph.getFeatureFlag(key, distinctId);
+}
+
+export async function isFeatureEnabled(key: string, distinctId: string): Promise<boolean> {
+  const ph = getClient();
+  if (!ph) return false;
+  const result = await ph.isFeatureEnabled(key, distinctId);
+  return result ?? false;
+}
+
+export function captureException(error: unknown, distinctId?: string, additionalProperties?: Record<string | number, any>): void {
+  const ph = getClient();
+  if (!ph) return;
+  ph.captureException(error, distinctId, additionalProperties);
+}
+
 export interface ApiQueryEvent {
   apiKey: string;
   agentFramework: string;
diff --git a/api/src/server.ts b/api/src/server.ts
index f3285a3a5..d44fe2d00 100644
--- a/api/src/server.ts
+++ b/api/src/server.ts
@@ -1,6 +1,7 @@
 import express from 'express';
 import cors from 'cors';
 import { Sentry, sentryRequestHandler } from './sentry';
+import { captureException as posthogCaptureException } from './analytics/posthog';
 import authRouter from './routes/auth';
 import productsRouter from './routes/products';
 import categoriesRouter from './routes/categories';
@@ -188,6 +189,7 @@ export function createApp() {
   // eslint-disable-next-line @typescript-eslint/no-unused-vars
   app.use((err: Error, _req: express.Request, res: express.Response, next: express.NextFunction) => {
     Sentry.captureException(err);
+    posthogCaptureException(err);
     next(err);
   });
 
diff --git a/deploy/gcp/api-service.yaml b/deploy/gcp/api-service.yaml
index 678a7a1c1..47e8a36da 100644
--- a/deploy/gcp/api-service.yaml
+++ b/deploy/gcp/api-service.yaml
@@ -48,11 +48,13 @@ spec:
                 secretKeyRef:
                   name: buywhere-admin-api-key
                   key: latest
-            - name: POSTHOG_API_KEY
+            - name: POSTHOG_PROJECT_TOKEN
               valueFrom:
                 secretKeyRef:
-                  name: buywhere-posthog-api-key
+                  name: buywhere-posthog-project-token
                   key: latest
+            - name: POSTHOG_HOST
+              value: "https://us.i.posthog.com"
           resources:
             limits:
               cpu: "1"