Agentline MCP

Give your AI agent a phone number, email, SMS, and voice calls — as MCP tools.

Install once in Claude Desktop, Cursor, Zed, Windsurf, or any MCP client, and your agent can provision phone numbers, capture 2FA codes, send SMS, place AI voice calls, and send/receive email directly.

Install

# requires uv — https://docs.astral.sh/uv/
uvx agentline-mcp

Or with pip:

pip install agentline-mcp
agentline-mcp

Configure

Set your API key as an environment variable. Get one at agentline.co.

export AGENTLINE_API_KEY=ag_live_...

Claude Desktop

Edit ~/Library/Application Support/Claude/claude_desktop_config.json (macOS) or %APPDATA%\Claude\claude_desktop_config.json (Windows):

{
  "mcpServers": {
    "agentline": {
      "command": "uvx",
      "args": ["agentline-mcp"],
      "env": {
        "AGENTLINE_API_KEY": "ag_live_..."
      }
    }
  }
}

Cursor

~/.cursor/mcp.json:

{
  "mcpServers": {
    "agentline": {
      "command": "uvx",
      "args": ["agentline-mcp"],
      "env": {
        "AGENTLINE_API_KEY": "ag_live_..."
      }
    }
  }
}

Zed

Add to ~/.config/zed/settings.json:

{
  "context_servers": {
    "agentline": {
      "command": {
        "path": "uvx",
        "args": ["agentline-mcp"],
        "env": { "AGENTLINE_API_KEY": "ag_live_..." }
      }
    }
  }
}

Windsurf / Continue / any stdio MCP client

Use the same uvx agentline-mcp command and set AGENTLINE_API_KEY in the server's env. All major MCP clients share the same stdio launch pattern.

Tools exposed

Phone numbers

• provision_number — get a phone number the agent can use
• release_number — release when done (avoids monthly charges)
• list_numbers — list provisioned numbers

SMS

• send_sms — send an outbound SMS
• wait_for_sms — long-poll for the next inbound SMS (with optional regex match)
• capture_code — the killer flow. Provision + wait for 2FA code + release, in one call

Voice

• make_call — place an outbound AI voice call (non-blocking, returns call_id)
• get_call — status, transcript, summary for a call
• hangup_call — end an in-progress call

Email

• create_email_address — provision an email
• list_email_addresses — list provisioned addresses
• release_email_address — release
• send_email — send an outbound email
• wait_for_email — long-poll for an inbound email
• capture_email_code — provision + wait for email-based verification code + release

Example prompts

"Sign me up for Substack using a throwaway phone number. Capture the 2FA code, paste it into the signup form, then release the number."

"Call +15551234567, pose as my assistant scheduling a dentist appointment for next Tuesday morning. Summarize the outcome when the call ends."

"Provision a new email address, start a free trial on example.com with it, and tell me the verification code that arrives."

Environment variables

Var	Required	Default	Notes
AGENTLINE_API_KEY	yes	—	Starts with ag_live_ or ag_test_
AGENTLINE_BASE_URL	no	https://api.agentline.dev	Override for self-hosted / staging

License

MIT