Install Green API WhatsApp in Cursor

What you need first

• Cursor, installed.
• Nothing else: the server runs on its publisher's machines and Cursor connects to it.
• Your own values for YOUR_X_INSTANCE_ID,YOUR_X_API_TOKEN.

Steps

1. Open ~/.cursor/mcp.json, or create it. For one project only, use .cursor/mcp.json in that project.
2. Add this block. If the file already has mcpServers, add only the entry inside it.

{
  "mcpServers": {
    "whatsapp": {
      "url": "https://mcp.green-api.com/mcp",
      "headers": { "X-Instance-Id": "YOUR_X_INSTANCE_ID", "X-Api-Token": "YOUR_X_API_TOKEN" }
    }
  }
}

3. Replace YOUR_X_INSTANCE_ID,YOUR_X_API_TOKEN with your own values.
4. Save the file. In Cursor's settings, find the server in the MCP section and turn it on if it is off.

Check it worked

Ask Cursor: List the tools of whatsapp.

If it does not start

401 Unauthorized

The endpoint wants a sign-in or a key. Sign in when Cursor asks, or check the value in place of the placeholder.

The server starts, but its tools fail

A YOUR_… placeholder is still in the config, or its value is wrong.

Nothing changes after a restart

The file is not valid JSON any more. Look for a missing comma where the block was added.