fix(gateway): reject unsupported responses subpaths for OAuth accounts#1373
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shichanglin5 wants to merge 1 commit intoWei-Shaw:mainfrom
Open
fix(gateway): reject unsupported responses subpaths for OAuth accounts#1373shichanglin5 wants to merge 1 commit intoWei-Shaw:mainfrom
shichanglin5 wants to merge 1 commit intoWei-Shaw:mainfrom
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ChatGPT Codex internal API (chatgpt.com/backend-api/codex/responses) only supports /responses and /responses/compact. When a proxy like LiteLLM forwards /v1/responses/input_tokens (OpenAI token counting endpoint) through an OAuth account, the request hits Cloudflare which returns 403 HTML. The rate limiter misinterprets this as an auth error and disables the account, causing all subsequent OpenAI requests to fail with 503 "no available OpenAI accounts". This fix validates the responses subpath before forwarding: for OAuth accounts, only /compact is allowed. Other subpaths (e.g. /input_tokens) are rejected early with a clear error, preventing the Cloudflare 403 from triggering account circuit-breaking. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Problem
OAuth accounts route to
chatgpt.com/backend-api/codex/responses. Sub-path requests like/v1/responses/input_tokensreturn 403 from Cloudflare, which the circuit breaker treats as auth failure and disables the entire account.Triggered by LiteLLM's
OpenAITokenCountercalling/v1/responses/input_tokensduring Claude Code context compaction (/compact).Fix
Validate responses API sub-path for OAuth accounts before forwarding:
/compactand/compact/*→ allowedApplied in both
buildUpstreamRequestOpenAIPassthroughandbuildUpstreamRequest.Verification
5 consecutive
/input_tokenscalls → 502 each (~5ms, no upstream hit), account NOT disabled,/v1/responsescontinues returning 200.