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MCP clients that check for a newer protocol version now discover AppSignal MCP tools

Tools·Nov 5, 2026ToolsNov 5, 2026

MCP clients that first check for a newer MCP protocol version, such as ChatGPT, now fall back to the version AppSignal MCP supports. Until now, these clients could sign in but then failed to discover AppSignal's tools. ChatGPT showed Authentication succeeded, action discovery failed.

If your client showed this error, connect it to AppSignal MCP again. To connect AppSignal MCP in the ChatGPT desktop app, follow the OpenAI Codex setup.