Cursor

Cursor supports the MCP protocol from version 0.43 onward. The config file lives inside your project (not in user-global settings), which keeps API keys out of dotfile syncs.

1. Create .cursor/mcp.json

In your project root, create the directory and file:

mkdir -p .cursor && touch .cursor/mcp.json

2. Add the prometheus server

{
  "mcpServers": {
    "prometheus": {
      "command": "npx",
      "args": ["-y", "@prometheus/context-mcp@latest"],
      "env": {
        "PROMETHEUS_API_KEY": "<your-api-key>",
        "PROMETHEUS_WORKSPACE_ID": "<your-workspace-id>"
      }
    }
  }
}

{
  "mcpServers": {
    "prometheus": {
      "command": "npx",
      "args": ["-y", "@prometheus/context-mcp@latest"],
      "env": {
        "PROMETHEUS_API_KEY": "${PROMETHEUS_API_KEY}",
        "PROMETHEUS_WORKSPACE_ID": "${PROMETHEUS_WORKSPACE_ID}"
      }
    }
  }
}

3. Reload Cursor

Cmd-Shift-P → Reload Window. Cursor reads the config on each window load. The MCP server status shows up in the MCP panel (Cmd-Shift-M).

What changes inside Cursor

The Agent panel now lists Prometheus tools. Agents can call them in their reasoning loops — particularly useful for grounding fixes in the actual call sites rather than hallucinated symbol names.

See MCP tools for the full surface.