Hail (MCP)
Connect AI tools to Hail via the Model Context Protocol (MCP) for inbound and outbound phone, SMS, and email
🚀 Quickstart
Connect to the Hail MCP server with Tenklo and call MCP tools in minutes. Hail MCP uses OAuth 2.1 with dynamic client registration, so no app registration is required.
In Tenklo (free signup), go to Integrations -> Configure New Integration -> Hail (MCP).
Go to Connections -> Add Test Connection -> Authorize, then log in to Hail. Later, you'll let your users do the same directly from your app.
Make your first MCP request (initialize handshake). Replace the placeholders below with your Environment API key, integration ID, and connection ID:
curl "https://api.tenklo.dev/proxy/mcp" \
-X POST \
-H "Authorization: Bearer <NANGO-API-KEY>" \
-H "Provider-Config-Key: <INTEGRATION-ID>" \
-H "Connection-Id: <CONNECTION-ID>" \
-H "Content-Type: application/json" \
-d '{
"jsonrpc": "2.0",
"id": 1,
"method": "initialize",
"params": {
"protocolVersion": "2025-06-18",
"capabilities": {},
"clientInfo": {
"name": "nango-client",
"version": "1.0.0"
}
}
}'Or fetch credentials with the Node SDK or API.
✅ You're connected! Check the Logs tab in Tenklo to inspect requests.
Follow our Auth implementation guide to integrate Tenklo in your app.
📚 Hail (MCP) guides
Tenklo uses dynamic client registration with Hail's MCP OAuth server. You do not need to register an MCP application. Hail exposes tools to place calls and send SMS and email, plus read and tracking tools across all three channels.
Official resources: Hail MCP server