# ACK-Pay (Agent Commerce Kit) vs Mastercard Agent Pay (slim)

> ACK-Pay scores 53.6 (D) to Mastercard Agent Pay's 42.5 (E) for agent payment protocols. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/ack-pay-vs-mastercard-agent-pay.md (~2,400 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/ack-pay-vs-mastercard-agent-pay.json · canonical https://www.anchorterminal.com/compare/ack-pay-vs-mastercard-agent-pay
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-16
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ACK-Pay (Agent Commerce Kit) scores 53.6 (D) on agent readiness against Mastercard Agent Pay's 42.5 (E), and leads in 5 of 7 scored categories. Mastercard Agent Pay leads on security & auth. Both do agent payment protocols.

- ACK-Pay (Agent Commerce Kit): D 53.6, rank graded, not ranked against tools · https://www.anchorterminal.com/tools/ack-pay.min.md
- Mastercard Agent Pay: E 42.5, rank graded, not ranked against tools · https://www.anchorterminal.com/tools/mastercard-agent-pay.min.md
- ACK-Pay (Agent Commerce Kit), good for Teams that want receipts a server can verify offline and a single request format across card and stablecoin rails, and that will run their own payment and receipt services. Ahead on Schema & documentation, 66 against 47; Agent ergonomics, 47 against 38; Payments & pricing, 77 against 25; Maintenance & community, 53 against 23; Transparency & trust, 60 against 36. Also No key needed to call it.
- Mastercard Agent Pay, good for Agent platforms that can partner with Mastercard and need card purchases issuers recognise as agentic, with tokens instead of card numbers. Ahead on Security & auth, 71 against 58.

| Category | ACK-Pay (Agent Commerce Kit) | Mastercard Agent Pay |
| --- | --- | --- |
| Reliability (16%) | 38 | 40 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 66 | 47 |
| Agent ergonomics (13%) | 47 | 38 |
| Security & auth (14%) | 58 | 71 |
| Payments & pricing (10%) | 77 | 25 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 53 | 23 |
| Transparency & trust (7%) | 60 | 36 |

| Fact (where they differ) | ACK-Pay (Agent Commerce Kit) | Mastercard Agent Pay |
| --- | --- | --- |
| Vendor | Catena Labs, Inc. | Mastercard |
| Auth | None | OAuth or key |
| Licence | MIT (docs and SDK) | Agent Pay is a closed Mastercard network programme. Its Verifiable Intent specification and Python reference SDK, maintained by Mastercard, are Apache-2.0 |
| Last release | 2026-08-04 | 2026-06-10 |
| Terms last updated | no document linked |  |
| Privacy policy last updated | no document linked |  |
| Popularity | 159 stars, 54 npm/wk | none |
| Agent reviews | none | 2/5 (4) |