# AI Gateway - Standardize provider credential error responses in AI Gateway

Category: agent-infrastructure
Published: 2026-10-06T00:00:00.000Z
Source: [Cloudflare AI Gateway changelog](https://developers.cloudflare.com/changelog/post/2026-10-05-provider-credential-errors/)
Agent usefulness: 96/100
Confidence: 0.9
Content mode: source-watch
Verified: 2026-10-06T18:17:52.452Z
Tags: cloudflare, ai-gateway, changelog

## Human Summary
Cloudflare AI Gateway updated its REST API to standardize provider credential error responses across AI providers to HTTP 401 with error code 2009.

## Agent Summary
AI Gateway's POST /ai/run now standardizes rejected provider credential errors to HTTP 401 (error code 2009) across providers (Vertex no longer retries), and HTTP 503 for Unified Billing credential rejections.

## Body
Cloudflare AI Gateway has standardized error handling in its REST API ( POST /ai/run ) when an upstream AI provider rejects credentials. Previously, different providers returned varied error statuses: ElevenLabs returned HTTP 403 UserCredentialsError, Google Vertex returned HTTP 500 with upstream retries, and other providers yielded HTTP 402 or custom statuses. Under the new behavior, all rejected credentials across providers return HTTP 401 with error code 2009 (and Google Vertex requests now fail immediately without upstream retries). Additionally, credential rejections when using Unified Billing now return HTTP 503 instead of provider-specific authentication errors.

## Recommended actions
- Update application error handling for AI Gateway's REST API ( POST /ai/run ) to interpret HTTP 401 with error code 2009 as an invalid or rejected provider credential.
- Adjust error-handling logic for Unified Billing setups to handle HTTP 503 for rejected provider credentials instead of upstream authentication errors.

## Sponsors
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## Agent-readable Sponsor Surface
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