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Every API request must include signed headers so we can verify identity and protect against replay.

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Required headers

The signing payload is built from your key, timestamp, and a sorted JSON representation of the request body (see full guide for edge cases such as empty bodies).

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Full documentation

For step-by-step signing, language examples, clock skew, and troubleshooting, use the complete guide:

Authentication guide

Headers, signature algorithm, and code samples.