The Sidaxis API is how a machine asks a live human for authorisation and proves it got one. Identify a person with oneface, issue a mandate with a scope, a ceiling and an expiry, check every action against that mandate, and anchor a receipt any counterparty can verify. Sidaxis never moves money and never settles.
Reference sections: quickstart, authentication with sandbox and live keys, identity and oneface endpoints, mandate issue, check and revoke, receipts and anchoring, webhooks and their signatures, errors including ceiling_exceeded and mandate_revoked, the MCP server and its tools, rate limits, and the dated changelog. The machine-readable spec is at openapi.yaml, and a plain-text company summary at llms.txt.