Agent2Agent Protocol · Endpoint removal
A2AClient.fromCardUrl stops working
Stopped working
Calls to SDK @a2a-js/sdk fromCardUrl from major 1 on Agent2Agent Protocol stopped working on July 22, 2026.
What to use instead of these calls
Create the client with new ClientFactory().createFromUrl(baseUrl) from @a2a-js/sdk/client and call sendMessage on it, with the v1.0 messages (one Part type, no kind field). Or pin @a2a-js/sdk below 1.
Calls it hits
SDK @a2a-js/sdk fromCardUrl from major 1
`A2AClient` was deprecated in v0.3 in favor of `ClientFactory` and `Client`
Facts
- API
- Agent2Agent Protocol
a2a-protocol.org - Kind
- Endpoint removal
- Takes effect
- July 22, 2026
- Calls after that day
- Fail
- Source
- Announcement
- Last updated
More from Agent2Agent Protocol
- The A2A v0.3 method naming is deprecated Deprecated, no date