What Is HTTP 422 Unprocessable Entity?

HTTP 422 Unprocessable Entity explained, and what it means when you see it in CI/CD and deployments.

HTTP 422 means the syntax is valid but the content failed semantic validation.

What it means

A 422 differs from 400: the JSON parses fine, but a field violates a rule (missing required value, out of range, wrong format). APIs return validation details in the body.

When you see it in CI/CD

In CI, a 422 from an API test means the payload is structurally valid but semantically wrong. Read the error body to see which field failed.

Key takeaways

• 422 means validation failed.
• Syntax is fine; a value is invalid.
• Read the body for field-level errors.

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