OpenRouter error
OpenRouter 422 unprocessable: what it means and how to fix it
422 unprocessableRetry? Not statedLast verified 0 documented fixes1 source
What it means
The request is syntactically valid but semantically unprocessable.
Causes
- Semantically invalid request
How to fix it
The official docs list no specific fix for this error. Check the causes above and the provider's error docs under Sources.
More OpenRouter errors
All 32 OpenRouter errors400 invalid_requestRetry? Not stated400 invalid_promptRetry? Not stated400 context_length_exceededRetry? Not stated400 max_tokens_exceededRetry? Not stated400 token_limit_exceededRetry? Not stated400 string_too_longRetry? Not stated400 invalid_imageRetry? Not stated400 image_too_largeRetry? Not stated
HTTP 422 at other providers
Compare 422 across providersFAQ
What does the OpenRouter error "422 unprocessable" mean?
The request is syntactically valid but semantically unprocessable.
How do I fix OpenRouter "422 unprocessable"?
The official docs list no specific fix for this error. Documented cause: Semantically invalid request
Should I retry OpenRouter "422 unprocessable"?
Not stated. The official docs do not say whether this error is retryable.
Which other AI APIs return HTTP 422?
Per their official error docs: DeepSeek API (422 - Invalid Parameters), Groq API (422 Unprocessable Entity), Mistral API (422 Validation error), OpenAI API (422 UnprocessableEntityError), xAI API (422 Unprocessable Entity).
Sources
Last verified against 1 source: OpenRouter's official docs and official SDK repositories.
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