{"record":{"id":"a4f70a1773ac83f6","repo":"xtekky/gpt4free","slug":"response-response-status-code-bad-gateway","errorCode":null,"errorMessage":"Response {response.status_code}: Bad Gateway","messagePattern":"Response (.+?): Bad Gateway","errorType":"exception","errorClass":"ResponseStatusError","httpStatus":502,"severity":"error","filePath":"g4f/requests/raise_for_status.py","lineNumber":114,"sourceCode":"    is_html = False\n    if message is None:\n        is_html = response.headers.get(\"content-type\", \"\").startswith(\n            \"text/html\"\n        ) or response.text.startswith(\"<!DOCTYPE\")\n        message = response.text\n    if message is None or is_html:\n        if response.status_code == 520:\n            message = \"Unknown error (Cloudflare)\"\n    if response.status_code in (429, 402):\n        raise RateLimitError(f\"Response {response.status_code}: {message}\")\n    if response.status_code == 401:\n        raise MissingAuthError(f\"Response {response.status_code}: {message}\")\n    if response.status_code == 403 and is_cloudflare(response.text):\n        raise CloudflareError(f\"Response {response.status_code}: Cloudflare detected\")\n    elif response.status_code == 403 and is_openai(response.text):\n        raise MissingAuthError(f\"Response {response.status_code}: OpenAI Bot detected\")\n    elif response.status_code == 502:\n        raise ResponseStatusError(f\"Response {response.status_code}: Bad Gateway\")\n    elif response.status_code == 504:\n        raise RateLimitError(f\"Response {response.status_code}: Gateway Timeout \")\n    elif response.status_code == 400 and \"API key not valid\" in message:\n        raise MissingAuthError(f\"Response {response.status_code}: Invalid API key\")\n    else:\n        raise ResponseStatusError(\n            f\"Response {response.status_code}: {'HTML content' if is_html else message}\"\n        )\n","sourceCodeStart":96,"sourceCodeEnd":123,"githubUrl":"https://github.com/xtekky/gpt4free/blob/973504e1770928ed5fb82f43da528f441ad9ddc3/g4f/requests/raise_for_status.py#L96-L123","documentation":"Sync variant: upstream HTTP 502 Bad Gateway becomes ResponseStatusError. The provider's gateway could not reach its backend; unrelated to your request payload.","triggerScenarios":"Synchronous g4f provider calls during backend outages or proxy failures that return 502.","commonSituations":"Provider maintenance windows; overloaded free providers; transient proxy errors.","solutions":["Retry after a short delay.","Fail over to another provider.","Check provider status pages for incidents.","Wrap calls with a bounded retry loop for 5xx."],"exampleFix":null,"handlingStrategy":"retry","validationCode":null,"typeGuard":"from g4f.errors import ResponseStatusError, CloudflareError, RateLimitError\ndef is_bad_gateway(err: BaseException) -> bool:\n    return isinstance(err, ResponseStatusError) and not isinstance(err, (CloudflareError, RateLimitError)) and 'Bad Gateway' in str(err)","tryCatchPattern":"from g4f.errors import ResponseStatusError\nimport time\nfor attempt in range(3):\n    try:\n        resp = g4f.ChatCompletion.create(model, messages)\n        break\n    except ResponseStatusError as e:\n        if 'Bad Gateway' not in str(e):\n            raise\n        time.sleep(2 ** attempt)","preventionTips":["Bounded retries for 5xx","Configure a failover provider","Track per-provider error rates","Abort retries after 2-3 attempts and surface the outage"],"tags":["http-502","bad-gateway","transient","sync"],"backgroundTag":null,"analyzedSha":"973504e1770928ed5fb82f43da528f441ad9ddc3","analyzedAt":"2026-08-14T23:45:32.408Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}