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Can't connect to simple MCP SSE #108

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Can't connect to simple MCP SSE#108
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matteo8p

Description

@eleqtrizit
eleqtrizit
opened on Jun 23, 2025

I cannot connect a simple MCP server (it has a simple push/get functions to act on an array).

I have verified the MCP Server works with my normal Desktop UI client, Cherry Studio.

Logs:
INFO04:08:19 PM
Connecting to MCP server via SSE: http://localhost:9050/
DEBUG04:08:19 PM
StdErr notification handler configured
WARN04:08:19 PM
No bearer token available for authentication
DEBUG04:08:19 PM
Setting up OAuth authentication for HTTP transport
INFO04:08:19 PM
Attempting to connect to MCP server (attempt 1/2)
DEBUG04:08:19 PM
MCP proxy server health check passed
DEBUG04:08:19 PM
Checking MCP proxy server health

Side note, maybe related - when I start MCP Jam I get a wall of errors:

Error from MCP server: SyntaxError: Unexpected token 'N', "No environ"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'l', "level : 40" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'm', "msg : Vers"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.time"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.status : ERROR" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.env : local" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.logg"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.logg"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.file"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.line"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.func"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.erro"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'F', "  File " is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected non-whitespace character after JSON at position 78 (line 1 column 79)
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'l', "line 20, i"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'w', "    with open("... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token '^', "         ^^^^^^^^^^"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'F', "FileNotFou"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.erro"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.erro"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 's', "stack_info : True" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "exc_info : None" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 's', "stacklevel : 2" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'l', "level : 40" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'm', "msg : Vers"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.time"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.status : ERROR" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.env : local" is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.logg"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.logg"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.file"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.line"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.func"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.erro"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'F', "  File " is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected non-whitespace character after JSON at position 78 (line 1 column 79)
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'l', "line 20, i"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'w', "    with open("... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token '^', "         ^^^^^^^^^^"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'F', "FileNotFou"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
    at Socket.<anonymous> (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:98:22)
    at Socket.emit (node:events:518:28)
    at addChunk (node:internal/streams/readable:561:12)
    at readableAddChunkPushByteMode (node:internal/streams/readable:512:3)
    at Readable.push (node:internal/streams/readable:392:5)
    at Pipe.onStreamRead (node:internal/stream_base_commons:189:23)
Error from MCP server: SyntaxError: Unexpected token 'e', "extra.erro"... is not valid JSON
    at JSON.parse (<anonymous>)
    at deserializeMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:26:44)
    at ReadBuffer.readMessage (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/shared/stdio.js:19:16)
    at StdioClientTransport.processReadBuffer (file:///Users/arivera/.npm/_npx/d1af9de5c448057a/node_modules/@modelcontextprotocol/sdk/dist/esm/client/stdio.js:127:50)
...lots more...

Activity

  1. matteo8p commented on Jun 24, 2025

    @matteo8p
    matteo8p
    on Jun 24, 2025
    Contributor

    Hey @eleqtrizit, thanks for reporting this issue. This is def a top priority. I personally haven't had issues with connecting to STDIO and SSE servers. There are two things that stand out to me:

    1. Usually SSE servers have an endpoint of /sse. Maybe try http://localhost:9050/sse?
    2. Starting up MCPJam shouldn't give you those errors. How are you running the inspector? Is it through npx @mcpjam/inspector@latest? If you're cloning the repo and running locally, the set up should be
    npm install 
npm run build
npm run start

    and you should see this

    Image

    Would you be able to share the server you're running? I'd love to try it out myself and help you debug. What framework are you using to build your server? No worries if the server is sensitive though!

  2. matteo8p
    self-assigned this
    on Jun 24, 2025

  3. eleqtrizit commented on Jun 24, 2025

    @eleqtrizit
    eleqtrizit
    on Jun 24, 2025
    Author

    Hi! I am using the command:
    npx @mcpjam/inspector@latest

    It's working now. Not sure why. I did try with /sse and without. But anyway, I'm happy if it is working! I will close this.

  4. eleqtrizit
    closed this as completedon Jun 24, 2025
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