Secure your APIs and endpoints

Transport stays familiar. The authority object changes: one-shot envelopes bound to method, endpoint, body, policy, tau, and nonce.

You do not need to rewrite every service to eliminate ambient credentials. Put Gate reverse proxy or SDK middleware in front of the routes whose stolen tokens hurt (admin, export, payment, mutate, and migrate with shadow mode before proof-required).

Clients that already speak JSON keep speaking JSON. They learn to present an envelope instead of (or in addition to, during coexistence) a bearer token. Replay of a captured payload fails at the nonce stage by design under a durable ledger.

What this solution claims

Existing REST/JSON APIs can keep their shapes while replacing bearer authority with request-bound envelopes.ValidatedDEMO-HACK news poll is ordinary JSON; only the authority object changes.

Every envelope binds method, endpoint_id, request body hash, policy hash, tau, and nonce_uuid into one composite digest.Shippingrequest_hash = sha256(method || endpoint_id || request_body_hash || policy_hash || tau || nonce_uuid).Holds under the reference architecture

Authority expires at the end of the request (a captured envelope is a fossil, not a reusable credential).ShippingOne-shot nonce plus request binding; capture does not authorize a second call.Holds under the reference architecture