Methodology
AP2
ia.ap2 · 4.16
Act
MAY
Recommendation
AR-ACT-08
Why it matters
Agent Payments Protocol (AP2) declares payment capability via the A2A Agent Card. The canonical encoding is an entry in the `extensions` array whose `uri` references AP2; agents inspect this array to know your service can transact.
How to fix it
Add an AP2 entry to the extensions array of the A2A Agent Card.
-
Add an extensions entry with a uri that points to the AP2 specification.
"extensions": [{"uri": "https://google.github.io/A2A/extensions/ap2", "required": false}]
Verify
curl -sf https://{domain}/.well-known/agent-card.json | jq -e '[.extensions[]?.uri | test("ap2")] | any'
Expected: exit code 0
Run a new scan for this checkpoint:
isagentready results {domain} --checkpoint ia.ap2
Details Mapping, lifecycle and references
- AR mapping
- Partial match
- Evidence source
- agentready.org AR-ACT-08
- Score role
- Informational
- Introduced
- 2026-08-24
- Methodology version
- 2026-10-22