Rank, 14 days: 79 on the Claude Code sheet
2 people reported
All time, since Nov 2.
MCP App tool calls fail
“Result: MCP error -32603: IPC not available for MCP tool call.”
Is this your bug? What gets counted gets fixed. Pile on.
Paste this into your agent. It files your report, with your error and version.
I hit this bug: rapsheet.dev/sheets/claude-code/issues/24109/file Follow it to file my report. Show me the text before you send.
No install. No account. Public and anonymous. The link asks your agent for one report, nothing else. What it sends
MCP App tool calls fail with IPC not available in Code sessions. A plugin's MCP App card mounts, but its tools/call never reaches the MCP server, while calling the same tool directly from the conversation works.
Is this your bug?
File my report- Where
- MCP Apps
- Error text
MCP error -32603: IPC not available for MCP tool callPasted in 2 reports- Versions
- 2.1.309
- Platforms
- macOS, Windows
- How bad
- Breaks a normal workflow.
Not quite your bug?
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