Astro MCP and Claude Desktop Integration

[tutkodev]

Astro MCP Integration with Claude Desktop

Hey, there. Was anybody able to integrate the Astro MCP with Claude? I've been trying to integrate the Astro MCP server with Claude Desktop on Ubuntu and encountered issues:

Current setup:

• Astro v5.7.12
• astro-mcp v0.3.1
• Claude Desktop (Ubuntu Linux)
• astro.config.mjs has mcp() integration properly configured
• Project running on port 4322

Verification Steps:

• Astro MCP server is correctly running at http://127.0.0.1:4322/__mcp/sse
• Verified server is operational with: curl -N http://127.0.0.1:4322/__mcp/sse
• MCP Inspector successfully connects to the Astro MCP server at http://127.0.0.1:6274/ and shows all tools (get-astro-config, list-astro-routes, etc.)

Key Issues:

1. Claude Desktop fails to connect with JSON parsing errors:

   • Unexpected token 'e', "event: endpoint" is not valid JSON
   • Unexpected token 'd', "data: /__m"... is not valid JSON

2. Error logs suggest a protocol mismatch:

   • Claude Desktop expects JSON-RPC messages
   • Astro MCP server is sending Server-Sent Events (SSE) format data

3. Attempts to use various configuration options in Claude Desktop all fail:

   • Direct URL configuration
   • Using transport type "sse"
   • Using curl as a command
   • Trying the MCP Inspector proxy

Would you have any guidance on the correct way to bridge between the Astro MCP server's SSE protocol and the JSON-RPC protocol that Claude Desktop expects?

[morinokami]

@tutkodev Thanks for reporting this! I'm also using Cursor, and astro-mcp is working fine on my end. Have you confirmed that astro-mcp is enabled in your Cursor settings? You should see something like this:

Oh, I mistook Claude for Cursor... According to this discussion, it seems Claude Desktop doesn't support SSE transport yet?

[tutkodev]

Thank you for the link, i'll try to look into it.

[jonaspm]

Zed Code Editor deprecated SSE in favor of Streamable HTTP transports.