Hi Apple Developer Community, Since March 16, 2026, our integration with the Apple Ads Campaign Management API (v5) is returning 403 Forbidden on all GET requests to the custom-reports endpoint, while POST requests to create reports continue to work without any issues. Environment API Version: v5 Base URL: https://api.searchads.apple.com/api/v5/ Authentication: OAuth 2.0 (Bearer token — token generation works fine) API User Role: API Account Manager What's broken GET /api/v5/custom-reports/63638557 → 403 Forbidden The response is raw HTML from Apple's gateway, not a JSON API error: 403 Forbidden 403 Forbidden Apple This indicates the request is being blocked at the reverse proxy / infrastructure level and never reaches the API application layer. A proper API-level authorization error would return JSON with messageCode and message fields. What still works POST creates report successfully POST /api/v5/custom-reports → 200 OK Response: { data: { id: 63638557, name: Impression_Share_Report_2026-03-22_daily, s
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