Stripe Link becomes the default checkout for agents, with the first hard volume data

Neither idea has open space. Both are on the roadmaps of large players and a growing set of fraud and chargeback vendors. For network-neutral scoring, Mastercard already runs an agent-probability score for issuers in US testing. Visa has TAP, and the networks are building a joint know-your-agent framework. Sardine, Skyfire, HUMAN and Riskified already sell agent identity and risk signals. The only clear opening is issuers and alternative networks that cannot see Mastercard's context, and that opening depends heavily on the Credit Card Competition Act. Both bills are stuck in committee with no vote scheduled. Also, an independent scorer would not have the network-level data that makes Mastercard's score valuable. To win, a newcomer would probably need to pool agent signals across issuers and protocols (TAP, AP2, OpenAI/Stripe checkout), sell to mid-size issuers through processors like Fiserv or FIS, and accept a slow start until routing rules change. The dispute evidence service is the more practical wedge in the short term, but it is not empty. Chargeflow and Justt publish agentic evidence playbooks, OriginStamp pitches tamper-evident mandate logs, and acquirers and AP2/PayPal plan to put mandates into dispute pipelines. A vertical focus could still win. Travel and healthcare bookings have complex terms, cancellations and multi-leg itineraries, and generic chargeback tools handle these poorly. A product that collects agent session logs, signed mandates and booking-specific terms, and maps them onto reason codes, has a window before networks write agent-specific dispute rules. Once Visa and Mastercard standardize mandate evidence in Verifi, Ethoca or compelling-evidence programs, that edge is likely to shrink to integration work. I found no product that is specifically a vertical agent-dispute service for travel or healthcare merchants.

• Mastercard Agent Pay trust and intelligence services

  Announced September 2026. Issuers get a probability score that a transaction was started by an AI agent, now in US testing. Mastercard plans to add behavior, merchant risk, credential risk and consumer propensity signals. This is the network-owned trust layer the opportunity describes.

• Visa Intelligent Commerce / Trusted Agent Protocol

  Visa's agent payments portfolio. TAP adds agent legitimacy, user-agent binding and per-transaction authentication on top of 3-D Secure. Visa, Mastercard and Ant International are also working on a shared know-your-agent interoperability framework.

• Skyfire (KYA, with Mastercard)

  A startup that verifies agent identity (KYA). It works with Mastercard to help issuers and merchants recognize trusted agents when deciding whether to authorize. Reported in coverage of the agent-trust ecosystem.

• Riskified + HUMAN Security

  Partnership since August 2025. HUMAN identifies and governs AI shopping agents, and Riskified scores fraud and offers chargeback guarantees on agent orders. This covers the merchant side, not issuers.

• Sardine

  A fraud platform that sells to banks and fintechs. Its 2026 whitepaper introduces a Know Your Agent layer for agentic commerce. It is a network-neutral vendor with issuer-type customers, so it overlaps directly with idea one.

• Chargeflow

  An automated chargeback-fighting vendor that publishes an agentic chargeback evidence playbook: delegated authority, purchase parameters, notification timestamps. A likely fast follower for idea two.

• Justt

  A chargeback management vendor positioning on the agentic commerce evidence gap. It cites survey data showing liability for agent purchases is unsettled.

• Checkout.com

  An acquirer advising merchants to use TAP and AP2 records as verifiable evidence of intent in disputes. Acquirers could bundle this evidence into their own dispute tools.

• OriginStamp

  Pitches tamper-evident, timestamped mandate logs as primary representment evidence in agentic chargebacks. This is very close to idea two.

• Google AP2 / PayPal

  AP2 makes the user's mandate a signed, verifiable object. PayPal describes adding mandates to dispute pipelines, which could turn evidence collection into a built-in feature of the protocol.

Checked 2026-10-10