AP2

Beta

AP2 is a beta listing under Payment rails. Open payment extension for A2A and UCP that records checkout and payment authorization as signed mandates. Public samples exist while FIDO continues the standards work. The listing is open source. Tags are mandates, cards, stablecoins.

Last verified 2026-10-19

Sources

Status: beta
Open source: Yes
Tags: mandates, cards, stablecoins
Last verified: 2026-10-19

Adoption: claimed vs measured

Claimed and measured adoption figures
Side	Metric	Figure	Checked
Vendor claim	None published	None published	2026-10-19
Independent measurement	None published	None published	2026-10-19

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

Comparisons

AP2 vs Machine Payments Protocol

Filters

Questions

What is AP2?: Open payment extension for A2A and UCP that records checkout and payment authorization as signed mandates. Public samples exist while FIDO continues the standards work.
What is the status of AP2?: AP2 is beta in Payment rails.
Is AP2 open source?: Yes. The repository URL is one of the links on the listing.
When was AP2 last verified?: Last verified 2026-10-19.