Connect Cursor to Hail over MCP
Cursor reads MCP servers from a JSON file or from an install link. Add Hail, and the Cursor agent can place calls, send SMS, and send email.
Works in Cursor Editor, Cursor CLI, and Cloud Agents.
Setup
1
Add Hail to Cursor
Add the Hail MCP server with the snippet below. Open the Customize sidebar, then MCP, then Add server.
~/.cursor/mcp.json
{
"mcpServers": {
"hail": {
"url": "https://mcp.hail.so"
}
}
}You can also use the install link: Install Hail in Cursor
2
Approve access and send a test prompt
Reload the client. On first use, the client opens a browser tab. Sign in to Hail or create an account. Click Allow. Then send the prompt below. The setup works if Hail places the call or sends the message.
Agent prompt: "Email design@acme.dev a summary of today's changes."Notes
OAuthAutomatic from the URL. The first tool call opens the consent tab.
KeysOnly url. No type field. Transport is auto-detected.
Project scope.cursor/mcp.json in the repo root. Use it for team repos.
ToggleOpen Customize, then MCP, to turn servers on and off. A toggle starts auth again.
PrivacyHail does not receive chat history. Hail receives only tool arguments.
ManageRevoke or manage this app at hail.so/console/apps.
Self-hostSet HAIL_API_KEY as the bearer. See docs/mcp.
Place your first call from Cursor
Self-host with your own carrier, or use a managed number from Hail.
