A2A Agent Card validate

agent402.tools · x402

Validate an A2A (Agent2Agent protocol) Agent Card: required fields, skill shape, transport names, capability flags - spec v0.3 structural core. Returns errors, interop warnings, and a normalized summary (skills, interfaces, capabilities). Deterministic mini-A2A tooling - check a card before your agent trusts it.

Name and description as published by x402 Bazaar

Live

Last successful check: 25 Oct 2026, 22:02 UTC.

answered, last 24 hours: 100%
answered, last 30 days: 100%

3 different wallets paid it in the last 30 days, as the x402 Bazaar reports. Payments

How addrbook checks →

Connect

https://agent402.tools/api/a2a-card-validate

x402: an unpaid request gets a 402 with the price and pay-to wallet. addrbook never pays.

Who's behind it

Listed by: x402 Bazaarlast seen 26 Oct, 06:00 UTC
Wallets named: 0xabf4fabd7c416fb67202e5f9002389fc75e2a9d0named by x402 Bazaar
Listed since: 25 Oct 2026, 17:52 UTC

Payments

different wallets paid it, last 30 days: 3
paid calls, last 30 days: 7
last paid call (UTC): 20 Oct, 01:58

As the x402 Bazaar reports, from payments Coinbase's facilitator settled. Read 26 Oct 2026, 06:00 UTC. addrbook has not counted these payments itself.

Its x402 endpoints have not listed a payment option addrbook could read yet.

Checks by endpoint

Host	Protocol	State	Last checked (UTC)	Last answered (UTC)	24 hours	30 days	Tools
agent402.tools	x402	Live	25 Oct, 22:02	25 Oct, 22:02	100%	100%	—

Also listed as

Other entries that share an endpoint with this one.

agent402.tools