Agentic payment security establishes what an AI agent may buy or pay for, which funds it may use, and how the recipient verifies that authority. The business needs a payment decision that remains tied to the request after the agent hands it to another system.
The practical outcome is controlled spending: permitted requests can proceed, while requests outside the agent's authority are denied or require the approvals defined by policy.
What is an agentic payment mandate?
A mandate represents delegated payment authority in a form another participant can verify. Its meaning depends on the protocol, the stage of the transaction, and the constraints it carries.
The Agent Payments Protocol, AP2 defines a verifiable chain of authority for payment-related actions. Mastercard describes Verifiable Intent as a way to establish evidence of authorization in agentic commerce.
Protocols provide the structure for that evidence. The business must still define which request it is prepared to authorize and ensure the receiving participants enforce the relevant constraints.
Which spending rules should a business define?
Start with the permitted merchant, payment method, currency, and amount. Then define which action the authority covers and whether additional approval is required.
| Decision | What the control should establish |
|---|---|
| Merchant | The approved merchant identity, rather than a display name alone |
| Payee | The recipient receiving the money, which can differ from the seller |
| Payment method | The instrument the agent is allowed to use |
| Purchase amount | The maximum for an individual purchase or payment |
| Request total | The total authorized across the current request |
| Delegation | Whether future requests are allowed and under which constraints |
| Human review | Which independent approvals are required before authorization |
These controls should use authoritative transaction data. A merchant's label in generated text is not evidence that the payment is going to that merchant.
TKeeper's payment policy guide documents merchant and payee identity checks, payment-method restrictions, amount limits, and totals across a request. The policies can apply to both AP2 and Mastercard Verifiable Intent authorities.
Does a request limit enforce a daily or monthly budget?
No. A request-total rule bounds the current request. It does not establish how much the agent or business has already spent during a day or month.
Period budgets require a source of spending history and a decision about pending, failed, retried, and concurrent payments. The application must make that state available to the budget decision. Keep these requirements explicit when comparing providers or designing a treasury integration.
What does TKeeper check before authorization?
For supported payment authorities, TKeeper validates the supplied content commitments and evaluates the request against the attached authority policy. Required approvals and the cryptographic identity's other controls also apply before it produces the authorized credential layer.
The resulting proof covers the submitted signing material. It lets a recipient detect changes to that material and verify the expected signing identity. TKeeper's agentic payment authorities describe the supported profiles, algorithms, and composition behavior.
TKeeper does not approve a payment on behalf of a card issuer or settle it. Its role is to enforce the authority used to produce the payment credential. The participating payment systems retain their own verification, risk, and processing responsibilities.
What must the recipient verify?
The recipient needs to verify the credential chain and the rules relevant to its role, including the expected issuer, audience, merchant identity, expiry, and replay protection. A valid signature alone does not prove that every payment condition has been satisfied.
The integration must also check that the credential applies to the payment being processed. A proof for one request should not be treated as unrestricted permission to make another payment.
Use the AP2 authority documentation and Mastercard Verifiable Intent authority documentation alongside the protocol specifications when reviewing these responsibilities.
How do approvals and distributed authority reduce risk?
Human approval adds an independent business decision for requests that need review. The approval must refer to the actual request, and the integration must obtain the required proofs before authorization.
Threshold cryptography addresses a different concern: which participants can use the identity that authorizes a payment. In threshold mode, fewer than the required peers cannot authorize a payment alone. The configuration and separation of peers need to match the organization's compromise and availability requirements.
See human approval for AI actions, quorum modes, and security assurance for the exact boundaries.
Which questions should a security review answer?
Confirm that a changed merchant, unapproved payment method, excessive amount, missing approval, or malformed disclosure is rejected. Check how unknown amounts and several actions within one request are handled. Review what happens when an authorization expires or the same credential is presented again.
Separate these acceptance checks from fraud scoring, transaction monitoring, card-network processing, and settlement. A deployment needs clear owners for each part of the payment flow.
Explore TKeeper's AI agent and payment controls for the product capabilities. For on-chain funds, read AI agent wallet security; for the wider architecture, start with AI agent security.