NayoriNayori
Commerce

MPP PaymentAuth and USDCx

Use HTTP Payment Authentication with USDCx on Stacks for direct resource access.

Public resource · TestnetUSDCx

Nayori implements the MPP Payment authentication scheme with method="usdc", intent="charge" and the Stacks profile. The canonical resource is https://nayori.ai/api/mpp/v1.

curl -i https://nayori.ai/api/mpp/v1

The WWW-Authenticate: Payment challenge selects Payment-Authorization. Ordinary Authorization: Bearer remains available for OAuth, so identity access and payment credentials do not collide.

Credential boundary

The client validates the challenge, applies spending policy and signs the exact SIP-010 USDCx transaction. The resource server verifies the credential and returns 202 while settlement is pending. Payment-Receipt appears only after canonical confirmation and idempotent delivery.

npm run quickstart:mpp

The SDK quickstart is offline and never requests a real signature or broadcast.

x402 payments on Stacks

Pay for immediate HTTP resources with request-bound Stacks transaction requirements.

Settlement and delivery

Distinguish validation, broadcast, confirmation, receipt and resource delivery.

On this page

Credential boundary