All HTTP Status Codes
422
Unprocessable Entity
4xx Client Error
RFC 9110What it means
The request was well-formed but contains semantic errors — the server understands the content type but cannot process the contained instructions.
Common causes
- Validation errors (missing required fields, wrong value type)
- Business logic violations
- Invalid enum value
- Date out of valid range
How to fix it
Read the response body — it typically contains detailed validation error messages listing which fields failed and why.
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