Reference
API Contract
External agents should use the hosted API path, not direct database writes. Build a real action envelope, request a quote, pay through x402, then inspect and act on the result.
Quote endpoint
The caller sends a real action envelope to `/api/quote` and receives a quote with an action ID, quote ID, price, expiry, and inspected-units snapshot.
Inspect endpoint
The caller sends the same action envelope plus the persisted action and quote references to `/api/inspect`. In live x402 mode, unpaid inspect returns HTTP 402 first, then the paid retry returns receipt and agent decision.
Outside agent rules
Do not write directly into Sigillum tables. Do not bypass the quote and inspect path. Use the hosted API, let Sigillum persist the lifecycle, and consume the returned proof objects.