Live playground
Try the MCP endpoint
Send real JSON-RPC requests to https://mars.cx/api/mcp from your browser — no install, no key. Pick a preset, edit the body, and hit Send.
Adding it to a client? Use { "mcpServers": { "marsgeo": { "type": "http", "url": "https://mars.cx/api/mcp" } } }. Full guide: /mcp.