MANDATESHIELD FOR AI AGENT BUILDERS

Outcome verification for AI agents using Stripe or x402

Keep a detached ALLOW from becoming reusable authority between the agent and an existing Stripe PaymentIntent or supported x402 execution path.

Current support boundary

This page describes an architecture pattern, not evidence of a customer deployment or provider adoption. Terminal outcome checking currently covers configured Stripe PaymentIntents and the supported x402 EIP-3009 profile only. Production requires provider credentials to be absent from the agent and alternate provider egress to be blocked. If native controls already satisfy the complete requirement, an additional MandateShield boundary may be unnecessary.

Who this is for

Teams with existing Stripe PaymentIntent or supported x402 EIP-3009 execution code that can isolate payment credentials behind one exclusive executor.

The execution risk

A model may correctly understand the original request and still encounter manipulated tools, changed prices or a substituted merchant later in the workflow. The final payment needs a deterministic boundary outside the model.

How the control fits

  1. Register the user's immutable amount, currency, merchant scope and expiry mandate.
  2. Pin the trusted issuer public key and obtain a fresh one-time challenge.
  3. Bind signed authority to the normalized final checkout and atomically reserve cumulative headroom.
  4. Have an audience-bound gateway CONSUME one exact request, redeem the signed permit at the execution edge, then report the durable submission for configured Stripe or x402 reconciliation.

Controls included

Hard spending capsMerchant allowlistsConsent and expiry checksAccount-pinned issuer keysOne-time verification challengesCumulative budget reservationRole-separated processor consumptionProvider-bound permits with one fresh server-side claimConfigured provider reconciliation independent of caller assertionSigned intent and purchase binding

The operational result

On the supported path, the caller cannot finalize success merely by reporting it; MandateShield checks the configured Stripe record or canonical chain evidence and keeps UNKNOWN reserved.

AI agent payment security guide →API documentation →

Check a purchase boundary now

Use the public validator with sample data, or integrate strict reservation plus processor-side CONSUME before provider submission.

Open free validator →