Skip to main contentHTTP errors
Our API follows a predictable HTTP error code format:
- 400 -
invalid_request_error: There was an issue with the format or content of your request. We may also use this error type for other 4XX status codes not listed below.
- 401 -
authentication_error: There’s an issue with your API key.
- 403 -
permission_error: Your API key does not have permission to use the specified resource.
- 404 -
not_found_error: The requested resource was not found.
- 413 -
request_too_large: Request exceeds the maximum allowed number of bytes.
- 429 -
rate_limit_error: Your account has hit a rate limit.
- 500 -
api_error: An unexpected error has occurred internal to Anthropic’s systems.
- 529 -
overloaded_error: API is temporarily overloaded.
