# Machine Payments Protocol (MPP) vs x402 (slim)

> Machine Payments Protocol (MPP) has a score of 81.1 (A) against x402's 79.7 (A). Both do agent payment protocols. The largest gap is transparency & trust, 20 points. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/mpp-vs-x402.md (~1,250 tokens) · this version ~330 tokens · JSON https://www.anchorterminal.com/compare/mpp-vs-x402.json · canonical https://www.anchorterminal.com/compare/mpp-vs-x402
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

Machine Payments Protocol (MPP) has a score of 81.1 (A) against x402's 79.7 (A). Both do agent payment protocols. The largest gap is transparency & trust, 20 points.

- Machine Payments Protocol (MPP): A 81.1, rank graded, not ranked against tools · https://www.anchorterminal.com/tools/mpp.min.md
- x402: A 79.7, rank graded, not ranked against tools · https://www.anchorterminal.com/tools/x402.min.md
- Pick Machine Payments Protocol (MPP) for agent ergonomics (+7), security & auth (+12). Pick x402 for transparency & trust (+20).

| Category | Machine Payments Protocol (MPP) | x402 |
| --- | --- | --- |
| Reliability (16%) | 85 | 87 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 89 | 86 |
| Agent ergonomics (13%) | 91 | 84 |
| Security & auth (14%) | 79 | 67 |
| Payments & pricing (10%) | 94 | 97 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 95 | 93 |
| Transparency & trust (7%) | 45 | 65 |