HTTP 226 IM Used

What this status code means

IM Used describes how the server processed the request and what the client should do next.

Who should act first

Interpret this code in protocol context before changing application logic.

What to check first

• Confirm response code matches endpoint contract.
• Check response body expectations (e.g., 200 vs 204).
• Validate async vs sync semantics (e.g., 202).

How it differs from similar codes

No direct related code links are available.

Reference and next step

Specification: RFC 9110.

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