Agent2Agent (A2A)
./ConnectOpen protocol for agent-to-agent discovery, task delegation, and streaming updates across vendors
OpenAPIllms.txt
$ protocol support
$ payment protocols
none documented — this service is not reachable over an agent payment protocol
$ agent access
authNo Auth
onboardingFull — agent can self-onboard
tosExplicitly welcomes bots
webhooksNo
free tierYes
billingfree
#a2a#protocol#interop#multi-agent#open-source
https://a2a-protocol.org
// last verified 8/26/2026
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