ANTHROPIC · MCP CLIENTQUICKSTART · 2 MIN

Claude × Hail

Claude was the first widely-shipped MCP host. Hail drops in as a remote MCP server — your agent gets call/sms/mail tools the moment Claude reconnects.

Claude DesktopClaude CodeClaude.ai (Web)

Two steps. That's the bar.

~60 SECONDS · NO API KEY
01

Drop Hail into your config

Add the Hail MCP server using the snippet below. Paste it where this client expects MCP servers — the path varies, the shape doesn't.

Settings → Connectors → Add custom connector

URL · Custom connector URL

https://mcp.hail.so
02

Click Allow. Then try it.

Reload the client. On first use it pops a browser tab — sign in to Hail (or sign up — takes 30 seconds), click Allow, and tokens flow back to the client. Send the prompt below — if a call is placed, an SMS lands, or an email shows up in the inbox view, you're done.

"Use hail to call my agent and ask for a status update."
■ NOTES & GOTCHAS
  • Claude.ai (Web) & Claude Desktop: Customize → Connectors → + → Add custom connector → paste the URL. Click Allow in the browser tab Claude opens; no key, no JSON.
  • Claude Code (CLI): claude mcp add --transport http hail https://mcp.hail.so — then run /mcp inside a session to complete the OAuth flow.
  • Legacy claude_desktop_config.json bridge (only if you can't use Connectors): mcp-remote https://mcp.hail.so via npx will negotiate OAuth from a stdio entry; needs Node, restart Desktop after editing.
  • Manage or revoke this app at https://hail.so/console/apps after first connect.
  • Self-host? Set HAIL_API_KEY as the bearer; see docs/setup/mcp.

Hail your first call — from this client.

Self-host on your own carrier or claim a managed number. Either way, your agent picks up the phone in ~120 seconds.

Get Access →Client docs ↗
■ ALSO AVAILABLE FOR
ClaudeChatGPTGeminiCursorWindsurfGitHub CopilotZedRaycast+all clients