PINT (header x-sumvin-pint-token) — extract and verify it from the incoming request as in the standard-tier quickstart, then apply the scope and tier checks below before confirming payment.
Accepting a Stamped Mandate at an x402 checkout is an early-access flow. Verifiers who plug in now help shape the sandbox spec and go live the moment the rail opens up — contact your account manager to join the pilot cohort.
What this page will cover
- Prerequisites (x402-capable endpoint, verifier credentials)
- Receive the incoming request and extract the Stamped Mandate
- Validate scope, tier, and signature
- Confirm the payment and respond