HTTP 103 Early Hints

What this status code means

Early Hints 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 whether your tooling records interim responses.
• Check proxy/client support for interim status handling.
• Verify a final non-1xx response is eventually returned.

How it differs from similar codes

• HTTP 102 Processing — full guide
• HTTP 104 Upload Resumption Supported — full guide

Reference and next step

Specification: RFC 9110.

Read the full troubleshooting guide for HTTP 103 · Open the 1xx hub · Compare adjacent codes