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mcp/harbor
Cursor

Countersign for Cursor

io.github.countersign-network/countersign

Kill switch + spend guard for AI agents that spend money, across every wallet vendor at once.

client:Cursor transport:stdio runtime:npm

Install Countersign in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "countersign": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@countersign/mcp"
      ],
      "env": {
        "COUNTERSIGN_URL": "<COUNTERSIGN_URL>",
        "COUNTERSIGN_API_KEY": "<COUNTERSIGN_API_KEY>"
      }
    }
  }
}

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs

Countersign in other clients

Countersign MCP server