Protocol profile
Mastercard Agent Pay for Machines (AP4M)
In short
Mastercard's machine-to-machine payment service for agents buying digital services, built on x402 with MPP compatibility, settling across cards, accounts and stablecoins; Early Access opened 20 Oct 2026. For Agent Pay for Machines, merchant of record is seller of the service and dispute rules are not published. Announced but not yet live: Stripe, Adyen, Checkout.com, and 4 more.
Fact sheet
- Type
- Protocol
- Operator
- Mastercard
- Homepage
- ap4m.build
- Matrix reach
- 0 live, 1 pilot, 7 announced, 0 not supported, 19 with no statement found
Readiness for merchants
Seven rows, each read from a primary source on 4 Nov 2026. The method page defines every row.
| Rubric row | Reading | Evidence | Source and read date |
|---|---|---|---|
| Specification public | Partial | Builds on the public x402 spec; Mastercard APIs are in Early Access. | mastercard.com, 4 Nov 2026 |
| Reference implementation | Early access | Toolkit and sandbox at ap4m.build. | mastercard.com, 4 Nov 2026 |
| Live surfaces | None | Pilots and Early Access only. | mastercard.com, 4 Nov 2026 |
| Processor support | Announced | Ten named processors and enablers as initial participants. | mastercard.com, 4 Nov 2026 |
| Merchant of record | Seller of the service | Aimed at digital services sold per call; the seller receives settlement. | mastercard.com, 4 Nov 2026 |
| Dispute rules | Not published | No dispute treatment published. | mastercard.com, 4 Nov 2026 |
| Cost | Not published | No fee published. | mastercard.com, 4 Nov 2026 |
The row in full: every column
| Column | Status | Note | Source and read date |
|---|---|---|---|
| Stripe | announced | Named among AP4M initial participants | mastercard.com, 4 Nov 2026 |
| Adyen | announced | Named among AP4M initial participants | mastercard.com, 4 Nov 2026 |
| PayPal | no statement found | no statement found (2026-11-04) | developer.paypal.com, 4 Nov 2026 |
| Checkout.com | announced | Named among AP4M initial participants | mastercard.com, 4 Nov 2026 |
| Braintree | no statement found | no statement found (2026-11-04) | developer.paypal.com, 4 Nov 2026 |
| Worldpay | announced | Global Payments named among AP4M initial participants | mastercard.com, 4 Nov 2026 |
| Coinbase | pilot | Completed end-to-end AP4M pilot before Early Access opened | mastercard.com, 4 Nov 2026 |
| Crossmint | announced | Named among AP4M initial participants as the agent's PSP | mastercard.com, 4 Nov 2026 |
| Skyfire | announced | Named among AP4M initial participants | mastercard.com, 4 Nov 2026 |
| PayOS | announced | Named among AP4M initial participants | mastercard.com, 4 Nov 2026 |
| Shopify | no statement found | no statement found (2026-11-04) | shopify.dev, 4 Nov 2026 |
| BigCommerce | no statement found | no statement found (2026-11-04) | bigcommerce.com, 4 Nov 2026 |
| Salesforce CC | no statement found | no statement found (2026-11-04) | salesforce.com, 4 Nov 2026 |
| Adobe Commerce | no statement found | no statement found (2026-11-04) | experienceleague.adobe.com, 4 Nov 2026 |
| commercetools | no statement found | no statement found (2026-11-04) | docs.commercetools.com, 4 Nov 2026 |
| WooCommerce | no statement found | no statement found (2026-11-04) | woocommerce.com, 4 Nov 2026 |
| Amazon | no statement found | no statement found (2026-11-04) | aboutamazon.com, 4 Nov 2026 |
| Walmart | no statement found | no statement found (2026-11-04) | corporate.walmart.com, 4 Nov 2026 |
| Target | no statement found | no statement found (2026-11-04) | corporate.target.com, 4 Nov 2026 |
| Etsy | no statement found | no statement found (2026-11-04) | help.etsy.com, 4 Nov 2026 |
| Wayfair | no statement found | no statement found (2026-11-04) | aboutwayfair.com, 4 Nov 2026 |
| ChatGPT | no statement found | no statement found (2026-11-04) | chatgpt.com, 4 Nov 2026 |
| Google AI Mode | no statement found | no statement found (2026-11-04) | developers.google.com, 4 Nov 2026 |
| Perplexity | no statement found | no statement found (2026-11-04) | perplexity.ai, 4 Nov 2026 |
| Amazon Rufus | no statement found | no statement found (2026-11-04) | aboutamazon.com, 4 Nov 2026 |
| Meta Muse | no statement found | no statement found (2026-11-04) | about.fb.com, 4 Nov 2026 |
| Copilot | no statement found | no statement found (2026-11-04) | about.ads.microsoft.com, 4 Nov 2026 |
| 1 live or pilot of 27 |
What Agent Pay for Machines does not do
- Is not a consumer checkout program.
- Is not generally available: Early Access since 20 Oct 2026.
- Does not publish fees or dispute rules.
Sourced facts
- Mastercard launched Agent Pay for Machines on 10 Jun 2026 for permissioned, orchestrated machine payments settled across cards, accounts and stablecoins. mastercard.com, read 4 Nov 2026.
- AP4M names four capabilities: credentialing (with Verifiable Intent), permissioning (programmatic rules and spend limits), transacting and settling. mastercard.com, read 4 Nov 2026.
- The June release cites open standards like x402 and "Machine Payments Protocol compatibility". mastercard.com, read 4 Nov 2026.
- Initial participants named include Adyen, Checkout.com, Cloudflare, Coinbase, Crossmint, Global Payments, PayOS, Skyfire, Stripe and Tempo. mastercard.com, read 4 Nov 2026.
- On 20 Oct 2026 at Cloudflare Connect, Mastercard said AP4M builds on x402 and opened Early Access with buyer- and seller-side APIs, a toolkit, sandbox and documentation. mastercard.com, read 4 Nov 2026.
- End-to-end pilots before Early Access ran with Cloudflare, Ant International, AIsa, Base, BVNK, Coinbase and Hype. mastercard.com, read 4 Nov 2026.
In the vendors section
- Mastercard, card network profile
Compare and alternatives
Sources
- ap4m.build/info, read 4 Nov 2026
- Mastercard launches Agent Pay for Machines, read 4 Nov 2026
- Watch Mastercard Agent Pay for Machines in action, read 4 Nov 2026
- mastercard.com/us/en/news-and-trends/press/2026/october/Mastercard-Agent-Pay-for-Machines-in-action.html, read 4 Nov 2026
Last reviewed