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The Agent Economy

Infrastructure directory

Listing

Machine Payments Protocol

Live

Machine Payments Protocol is a live listing under Payment rails. 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. The listing is open source.

Last verified 2026-10-16

Sources

Status
live
Open source
Yes
Tags
http-402, cards, stablecoins
Last verified
2026-10-16

Adoption: claimed vs measured

Claimed and measured adoption figures
SideMetricFigureChecked
Vendor claimNone publishedNone published2026-10-19
Independent measurementTransactions since mid March 2026 launch, cumulative raw onchain~184,60012026-10-19
Independent measurementVolume settled since mid March 2026 launch, cumulative raw onchainover $38,00012026-10-19
  1. Published by Artemis Analytics. Source date 2026-04-21. Checked 2026-10-19. Agentic Payments from the Ground Up (Visa and Artemis)

Figures are quoted from the linked sources and dated. They measure different things and are shown side by side without a conclusion.

How these figures are chosen · Checked 2026-10-19

Glossary

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Questions

What is Machine Payments Protocol?
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.
What is the status of Machine Payments Protocol?
Machine Payments Protocol is live in Payment rails.
Is Machine Payments Protocol open source?
Yes. The repository URL is one of the links on the listing.
When was Machine Payments Protocol last verified?
Last verified 2026-10-16.

Sources