Hail MCP MCP server

Hail provides a remote MCP server that enables AI agents to place phone calls, send and receive SMS messages, and manage email communications. It supports OAuth authentication for cloud deployments and offers tools for call management, SMS handling, email sending/receiving, contact management, and event streaming, all accessible via a single endpoint without local installation.

Endpoint and access

No sign-in: your client connects and lists tools immediately, with no account or key.

No sign-inEndpoint checked 2026-10-05Operated by Hail

MCP endpoint (Streamable HTTP)

https://mcp.hail.so

Vendor documentation

What you can do with it

Place outbound AI phone calls
Send and receive SMS messages
Manage email inbox and send emails
List and lookup contacts

Tools advertised by the last live check:

place_call
send_email
upload_email_attachment
get_call
list_calls
send_sms
get_sms
list_sms
get_email
list_emails
get_email_raw
get_email_attachment
get_email_events
get_email_stats
get_events
list_agents
create_agent
route_number
list_contacts
lookup_contact
list_email_domains
whoami
create_contact

Connect from your client

Each snippet registers the same endpoint; pick the client you use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Claude Code

Run this once in a terminal. It registers a Streamable HTTP server. Use --scope project to write .mcp.json for the repo.

Claude Code configuration

claude mcp add --transport http hail-mcp https://mcp.hail.so

Codex

Run this once. Codex stores MCP servers in ~/.codex/config.toml (or .codex/config.toml in a trusted project).

Codex configuration

codex mcp add hail-mcp --url https://mcp.hail.so

Cursor

Merge this server into .cursor/mcp.json in your project, then enable hail-mcp in your MCP settings.

Cursor configuration

{
  "mcpServers": {
    "hail-mcp": {
      "url": "https://mcp.hail.so"
    }
  }
}

Cline

Merge this into cline_mcp_settings.json (Cline → MCP Servers → Configure). The type must be streamableHttp for a remote HTTP server.

Cline configuration

{
  "mcpServers": {
    "hail-mcp": {
      "type": "streamableHttp",
      "url": "https://mcp.hail.so",
      "disabled": false
    }
  }
}

VS Code

Merge this server into .vscode/mcp.json. Use MCP: List Servers to start hail-mcp and inspect its tools.

VS Code configuration

{
  "servers": {
    "hail-mcp": {
      "type": "http",
      "url": "https://mcp.hail.so"
    }
  }
}

Gemini CLI

Run this once. It writes .gemini/settings.json in the current project; pass --scope user for ~/.gemini/settings.json.

Gemini CLI configuration

gemini mcp add --transport http hail-mcp https://mcp.hail.so

Claude Desktop

Merge this into claude_desktop_config.json (macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\), then restart Claude Desktop.

Claude Desktop configuration

{
  "mcpServers": {
    "hail-mcp": {
      "url": "https://mcp.hail.so"
    }
  }
}

Windsurf

Merge this into ~/.codeium/windsurf/mcp_config.json, then refresh MCP in Cascade. Windsurf remote servers use serverUrl, not url.

Windsurf configuration

{
  "mcpServers": {
    "hail-mcp": {
      "serverUrl": "https://mcp.hail.so"
    }
  }
}

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