Agentsim
FreeNot checkedMCP server that enables AI coding assistants to provision temporary US phone numbers and receive SMS OTPs for verification workflows.
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)
Install Agentsim in Claude Desktop, Claude Code & Cursor
unyly install agentsim-mcpInstalls 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-mcpFAQ
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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