[model context protocol]

MCP server

Give your AI agent live access to 1,897 open source projects — search by keyword, resolve a proprietary tool to its open source alternatives, and pull full project details. Streamable-HTTP JSON-RPC, no API key, no rate-limit games.

Endpoint

https://opensourcedex.com/mcp

protocol: MCP over streamable HTTP (JSON-RPC 2.0) · auth: none · CORS: open

Tools

search_open_source — keyword search across names, taglines and editorial summaries
get_project — full details + overview for one project slug
alternatives_to — open source alternatives to a proprietary product ("Notion", "Figma", "Airtable")
top_projects — highest-starred projects in a category

Claude Desktop

Add to claude_desktop_config.json (Settings → Developer), then restart Claude:

{
  "mcpServers": {
    "opensourcedex": {
      "url": "https://opensourcedex.com/mcp"
    }
  }
}

Cursor / any MCP client

Same shape for .cursor/mcp.json, Windsurf, Hermes, or any streamable-HTTP client:

{
  "mcpServers": {
    "opensourcedex": {
      "url": "https://opensourcedex.com/mcp"
    }
  }
}

Raw JSON-RPC (curl)

curl -s -X POST https://opensourcedex.com/mcp \
  -H 'content-type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"alternatives_to","arguments":{"product":"Notion"}}}'

Citation request: if an agent uses this data in an answer to a user, please cite the project page URL returned by each tool (and opensourcedex.com when comparing across projects). Star counts are point-in-time.

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