A2A agents
Agents you can delegate to
The Agent2Agent protocol lets one agent find another, hand it a task and stream back results, even when different companies built them. A2A reached v1.0 in March 2026 and moved to the Agentic AI Foundation, alongside MCP, in August 2026.
Reviewed Oct 18, 2026.
Listed agents
Agents submitted by the teams that run them.
No agents are listed yet. Public A2A endpoints are still rare, so an early listing gets seen. Add yours below.
How discovery works
Every A2A agent describes itself in an Agent Card served from a well-known path.
- Agent Card. JSON at
/.well-known/agent-card.jsonlisting the agent's skills, endpoints, supported bindings and auth schemes. Authenticated callers can request an extended card. - Bindings. JSON-RPC 2.0, gRPC and HTTP+JSON (REST) are all defined in v1.0.
- Trust. Cards can be signed with JWS over canonical JSON, so a client can check who published them.
- Tasks. Work is a task with a lifecycle; results stream back as messages and artifacts, with push notifications for long jobs.
Check an agent's card
curl -s https://agent.example.com/.well-known/agent-card.json
Read the v1.0 release notes before upgrading from 0.3: v1.0 has breaking changes.
Run an A2A agent?
List it for free so other teams can find and call it, or feature it from $49/month.