Comparison
Machine Payments Protocol vs x402
Machine Payments Protocol and x402 are Payment rails listings set side by side. Machine Payments Protocol is live. x402 is live. Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt.
Last verified 2026-10-16 (Machine Payments Protocol), 2026-10-16 (x402)
Sources
| Field | Machine Payments Protocol | x402 |
|---|---|---|
| Status | Live | Live |
| Open source | Yes | Yes |
| Last verified | 2026-10-16 | 2026-10-16 |
| Mechanism | Open HTTP 402 protocol, co-authored by Stripe and Tempo, so an agent can authorize payment for an API with a card or a stablecoin and receive a receipt. | Open HTTP payment standard. A server answers with status 402, the client pays and retries, and a facilitator can verify and settle the payment. |
| Tags | http-402, cards, stablecoins | http-402, stablecoins, pay-per-call |
| Links | ||
| Sources |
Tags
- Shared
- http-402, stablecoins
- Only Machine Payments Protocol
- cards
- Only x402
- pay-per-call
Glossary
Questions
- What is the status of Machine Payments Protocol and x402?
- Machine Payments Protocol is live. x402 is live.
- When was each listing last verified?
- Machine Payments Protocol was last verified 2026-10-16. x402 was last verified 2026-10-16.
- Does this page score Machine Payments Protocol against x402?
- No. The page restates each mechanism and cites the listing sources.