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Agentsim

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MCP server that enables AI coding assistants to provision temporary US phone numbers and receive SMS OTPs for verification workflows.

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About

MCP server that enables AI coding assistants to provision temporary US phone numbers and receive SMS OTPs for verification workflows.

README

MCP server that exposes AgentSIM OTP session tools to AI coding assistants: Claude Code, Cursor, Windsurf, and any other MCP-compatible host.

Setup

Claude Code

claude mcp add agentsim -e AGENTSIM_API_KEY=asm_live_xxx -- uvx agentsim-mcp

Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "agentsim": {
      "command": "uvx",
      "args": ["agentsim-mcp"],
      "env": {
        "AGENTSIM_API_KEY": "asm_live_xxx"
      }
    }
  }
}

Cursor / Windsurf

Add agentsim-mcp as a stdio MCP server with AGENTSIM_API_KEY in the environment config.

Remote (no install)

Connect directly to the hosted MCP server without installing anything locally:

{
  "mcpServers": {
    "agentsim": {
      "type": "streamable-http",
      "url": "https://mcp.agentsim.dev/mcp",
      "headers": {
        "x-api-key": "asm_live_..."
      }
    }
  }
}

Tools

Tool Description
provision_number Provision a temporary programmable US number for an OTP session — returns number, session ID, expiry
wait_for_otp Long-poll until an OTP arrives on the session (returns parsed code)
get_messages List raw SMS messages received on a session
release_number Release a session early (number returned to pool)
list_numbers List all active sessions for this account

Auth

Set AGENTSIM_API_KEY in your environment. Get your key at console.agentsim.dev.

Supported Countries

US (more coming soon)

from github.com/agentsimdev/agentsim-mcp

Install Agentsim in Claude Desktop, Claude Code & Cursor

Recommended · one command, every IDE
unyly install agentsim-mcp

Installs into Claude Desktop, Claude Code, Cursor & VS Code — handles npx, uvx and build-from-source repos for you.

First time? Get the CLI: curl -fsSL https://unyly.org/install | sh

Or configure manually

Run in your terminal:

claude mcp add agentsim-mcp -- uvx agentsim-mcp

FAQ

Is Agentsim MCP free?

Yes, Agentsim MCP is free — one-click install via Unyly at no cost.

Does Agentsim need an API key?

No, Agentsim runs without API keys or environment variables.

Is Agentsim hosted or self-hosted?

Self-hosted: the server runs locally on your machine via the install command above.

How do I install Agentsim in Claude Desktop, Claude Code or Cursor?

Open Agentsim on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.

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