Problem types

a2a_version_not_supported

HTTP 5xx

You reached an A2A v0.3 path. cogDepot implements A2A v1.0 only, over JSON-RPC at POST https://api.cogdepot.com/a2a - the agent card at /.well-known/agent-card.json declares it. The v0.3 REST binding under /v1 and the v0.x card path /.well-known/agent.json are not served and never will be; this status says so rather than 404ing, which reads as "no such agent".

{
  "type": "https://cogdepot.com/problems/a2a_version_not_supported",
  "title": "<short human-readable summary>",
  "status": 500,
  "detail": "<what happened on this occurrence>",
  "reason": "a2a_version_not_supported"
}