Agent Payments Protocol
Agent-led payments still need a local decision about consent, scope, mandate freshness and audit evidence before authorisation.
Agentic payments and AI checkout
Verify AI agents before they buy, pay or call tools.
Agentic commerce is becoming real through AI shopping agents, browser agents, MCP tools, AP2 mandates, Stripe MPP, x402, shared payment tokens, Visa TAP and network-issued agentic tokens. AffixIO gives products a signed verification layer before an agent checks out, spends, exports, writes or changes state.
Interactive agent payment check
Build the agent action before checkout.
Choose the agent, action and scope. AffixIO shows what should be verified before an AI agent can complete checkout, call a paid API, trigger an MCP write, use a wallet session or access a connected account.
ALLOW WITH PROOF
Evidence returnedproof_id, policy_version, ML-DSA-65 attestation, Merkle audit digest
The terms buyers are searching
Agentic payments need more than a token.
Cards, wallets, stablecoin rails, payment protocols and checkout APIs are converging around a new customer: the agent. But a payment token alone does not answer whether the agent is recognised, whether the user delegated consent, whether the mandate is current, or whether the action matches policy.
Machine Payments Protocol
Machine-to-machine payments, API calls and microtransactions need proof that the agent is allowed to spend.
HTTP payment rails
When an endpoint asks an agent to pay, AffixIO can verify the intent before the request becomes spend.
Shared payment tokens
Scoped payment credentials become stronger when backed by signed policy and consent verification.
Trusted agent protocols
Merchants need to tell trusted agents from malicious automation and still prove the action was in scope.
Tool-call commerce
MCP tools can write, export, reserve, renew, buy and call paid APIs. Verification belongs before execution.
Where AffixIO fits
A proof layer between the agent and the rail.
AffixIO does not replace Visa, Mastercard, Stripe, Google AP2, x402, MPP, merchant checkout, issuer risk or wallet approval. It sits in the decision lane before the action and creates signed evidence for the systems that still need to trust the result.
Before checkoutVerify agent_ref, subject_ref, consent_ref, merchant, amount ceiling, item class and expiry.
Before MCP executionGate CRM writes, support replies, exports, paid API calls, package publishing and account changes.
Before payment captureBind the action to a nonce, timestamp, policy version, circuit id and proof digest.
After the decisionStore proof_id, ML-DSA-65 attestation and Merkle audit material for review.
Natural agent examples
Muse AI, Grok Bot and the wider agent wave all point to the same problem.
Personal agents, cloud-computer agents, coding agents, browser agents and AI shopping agents can all cross from suggestion into action. AffixIO does not claim direct integration with Muse AI, Grok Bot, OpenAI agents, Claude agents, Gemini agents, Perplexity Comet or any named third-party agent unless a specific integration page says so. These names describe the market category that now needs verifiable consent, policy and audit.
Personal agentShopping, travel, email, calendars, forms, subscriptions.
Cloud-computer agentPersistent browser, logged-in tools, code runner, files, apps.
Agentic browserProduct discovery, comparison, cart building, checkout, support.
MCP tool agentApp connectors, paid endpoints, writes, exports, operations.
Organic search answers
High-intent questions this page answers.
How do AI agents prove payment consent?
The customer host keeps the consent record. AffixIO verifies that the proposed agent action fits the approved scope and returns signed evidence.
What is agentic payment verification?
It is the pre-action check that binds agent identity, delegated authority, amount, merchant, policy and audit material before payment.
How do merchants verify AI shopping agents?
Require agent_ref, subject_ref, checkout intent, consent_ref, nonce, timestamp and policy version before order creation or capture.
How do MCP tools stay safe for payments?
Gate writes, exports, paid API calls and checkout tools with signed allow or deny evidence before the tool executes.
How do wallets approve agent actions?
Wallets can check session scope, amount ceiling, merchant category, expiry and consent state before authorisation.
What is the audit trail for agentic commerce?
Proof id, policy version, nonce, timestamp, decision, reason code, attestation and Merkle audit digest.
Ship for the agent economy
Make every AI payment prove why it should happen.
Use AffixIO when AI agents need signed permission before checkout, payments, API calls, MCP tools, bookings, exports, account changes or production workflows.