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Real SIM-backed mobile numbers for AI agents to receive SMS and OTP codes.
About
Real SIM-backed mobile numbers for AI agents to receive SMS and OTP codes.
Remote endpoints: streamable-http: https://mcp.agentsim.dev/mcp
Security Report
4.5
Use Caution4.5High RiskThis is a well-structured AgentSIM MCP server for phone number provisioning and SMS OTP handling. The code follows good security practices with proper environment variable usage for API keys, appropriate error handling, and well-defined input validation. Minor concerns include broad exception handling and verbose error messages, but these are low-severity issues that don't significantly impact security. Supply chain analysis found 6 known vulnerabilities in dependencies (1 critical, 3 high severity).
8 files analyzed · 9 issues found
Security scores are indicators to help you make informed decisions, not guarantees. Always review permissions before connecting any MCP server.
Permissions Required
This plugin requests these system permissions. Most are normal for its category.
How to Install & Connect
Available as Local & Remote
This plugin can run on your machine or connect to a hosted endpoint. during install.
Documentation
View on GitHubFrom the project's GitHub README.
agentsim-mcp
MCP server that exposes AgentSIM phone number 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 phone number for an agent — 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)
Reviews
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