Verified Sourcepaths · Markdown document

A2A protocol specification (raw Markdown)

healthy

Publisher

A2A Protocol / a2aproject

Human landing

https://a2a-protocol.org/latest/specification/

Artifact URL

https://raw.githubusercontent.com/a2aproject/A2A/main/docs/specification.md

Copy artifact URL

Auth

none recorded

Rate limit

Raw GitHub file; ordinary HTTP.

Evidence

agent-web · standards

Publisher identity: A2A Protocol / a2aproject Artifact relationship: official repository Automated access: plain GET succeeded Integrity hash: 6a78d242fe05… Parseability: valid Effects: read Licensing: A2A specification license as published in the repo. Freshness: Sep 17, 2026, 7:10 PM PDT

Notes

Pattern row, not a live third-party card. The standard path is https://{agent-server-domain}/.well-known/agent-card.json (RFC 8615). The rename landed in a2a-sdk v0.3.0, which serves both paths with a deprecation warning on the legacy /.well-known/agent.json.

Tasks this artifact can answer

• read how A2A agent cards are discovered
• distinguish /.well-known/agent-card.json from the legacy /.well-known/agent.json path

Change history

• healthySep 17, 2026, 7:10 PM PDT · HTTP 200
• healthySep 17, 2026, 7:03 PM PDT · HTTP 200
• healthySep 17, 2026, 6:57 PM PDT · HTTP 200
• healthySep 17, 2026, 6:56 PM PDT · HTTP 200
• healthySep 17, 2026, 6:55 PM PDT · HTTP 200
• healthySep 17, 2026, 6:55 PM PDT · HTTP 200
• healthySep 17, 2026, 6:06 PM PDT · HTTP 200
• healthySep 17, 2026, 6:01 PM PDT · HTTP 200
• healthySep 17, 2026, 5:06 PM PDT · HTTP 200
• healthySep 17, 2026, 4:22 PM PDT · HTTP 200
• healthySep 17, 2026, 4:22 PM PDT · HTTP 200
• healthySep 16, 2026, 8:36 PM PDT · HTTP 200