Radzen MCP doesn't work in OpenCode - "Session not found"

Radzen.Blazor Components
1

I have the Radzen MCP set up as follows in my opencode.json file:

"radzen-blazor": {
  "type": "remote",
  "url": "https://app.radzen.com/mcp",
  "headers": {
    "X-Radzen-Key": "MY-REDACTED-KEY"
  }
}

I have other MCPs also which work fine, and I’m able to use the Radzen MCP fine with VS Code. But whenever OpenCode tries to call it I get:

Streamable HTTP error: Error POSTing to endpoint: {"error":{"code":-32001,"message":"Session not found"},"id":"","jsonrpc":"2.0"}

Any ideas? I haven’t encountered that in OpenCode with any other MCP server

2

Hi @andrew_c,

We just released a new update of the MCP which should hopefully address this issue (dropping sessions). Try restarting opencode and test again.

3

Hi @korchev . Yes looks like it’s working now. Thanks!

4

Hi @korchev . I’m seeing this error again recently. Has anything changed in the MCP server?

5

Hi @andrew_c,

No, there aren't new changes however it seems opencode has a problem with resuming sessions that have timed out. We have deployed a fix that should hopefully mitigate the problem. Try again.