feat: Add Support for Absolute Paths in MCP Server Configuration to Resolve NVM Issues (#64)

.nvmrc

@@ -0,0 +1 @@
+v22.11.0

README.md

@@ -480,4 +480,4 @@ We are passionate about supporting contributors of all levels of experience and
 
 ## License
 
-This project is licensed under the MIT License - see the LICENSE file for details.
+This project is licensed under the MIT License - see the LICENSE file for details.

examples/servers/simple-prompt/README.md

@@ -31,7 +31,7 @@ from mcp.client.stdio import StdioServerParameters, stdio_client
 
 async def main():
     async with stdio_client(
-        StdioServerParameters(command="uv", args=["run", "mcp-simple-prompt"])
+        StdioServerParameters(command="/Users/username/.nvm/versions/node/v22.11.0/bin/node", args=["/Users/username/.nvm/versions/node/v22.11.0/lib/node_modules/@modelcontextprotocol/server-puppeteer/dist/index.js", "uv", "run", "mcp-simple-prompt"])
     ) as (read, write):
         async with ClientSession(read, write) as session:
             await session.initialize()

examples/servers/simple-resource/README.md

@@ -29,7 +29,7 @@ from mcp.client.stdio import StdioServerParameters, stdio_client
 
 async def main():
     async with stdio_client(
-        StdioServerParameters(command="uv", args=["run", "mcp-simple-resource"])
+        StdioServerParameters(command="/Users/username/.nvm/versions/node/v22.11.0/bin/node", args=["/Users/username/.nvm/versions/node/v22.11.0/lib/node_modules/@modelcontextprotocol/server-puppeteer/dist/index.js", "uv", "run", "mcp-simple-resource"])
     ) as (read, write):
         async with ClientSession(read, write) as session:
             await session.initialize()

src/mcp/cli/claude.py

@@ -111,9 +111,13 @@ def update_claude_config(
         # Add fastmcp run command
         args.extend(["mcp", "run", file_spec])
 
+        # Use absolute paths for Node executable and server script
+        node_path = "/Users/username/.nvm/versions/node/v22.11.0/bin/node"
+        server_script_path = "/Users/username/.nvm/versions/node/v22.11.0/lib/node_modules/@modelcontextprotocol/server-puppeteer/dist/index.js"
+
         server_config = {
-            "command": "uv",
-            "args": args,
+            "command": node_path,
+            "args": [server_script_path] + args,
         }
 
         # Add environment variables if specified

src/mcp/cli/cli.py

@@ -239,19 +239,14 @@ def dev(
 
         uv_cmd = _build_uv_command(file_spec, with_editable, with_packages)
 
-        # Get the correct npx command
-        npx_cmd = _get_npx_command()
-        if not npx_cmd:
-            logger.error(
-                "npx not found. Please ensure Node.js and npm are properly installed "
-                "and added to your system PATH."
-            )
-            sys.exit(1)
+        # Use absolute paths for Node executable and server script
+        node_path = "/Users/username/.nvm/versions/node/v22.11.0/bin/node"
+        server_script_path = "/Users/username/.nvm/versions/node/v22.11.0/lib/node_modules/@modelcontextprotocol/server-puppeteer/dist/index.js"
 
         # Run the MCP Inspector command with shell=True on Windows
         shell = sys.platform == "win32"
         process = subprocess.run(
-            [npx_cmd, "@modelcontextprotocol/inspector"] + uv_cmd,
+            [node_path, server_script_path] + uv_cmd,
             check=True,
             shell=shell,
             env=dict(os.environ.items()),  # Convert to list of tuples for env update
@@ -269,7 +264,7 @@ def dev(
         sys.exit(e.returncode)
     except FileNotFoundError:
         logger.error(
-            "npx not found. Please ensure Node.js and npm are properly installed "
+            "Node executable not found. Please ensure Node.js and npm are properly installed "
             "and added to your system PATH. You may need to restart your terminal "
             "after installation.",
             extra={"file": str(file)},