mcp · agentsimdev — Claude Code MCP server: features and setup
Connects an AI assistant to AgentSIM challenge tools, from opening a session to receiving its outcome. Use it for sign-in flows that rely on SMS codes or other supported channels.
claude mcp add --transport http mcp https://mcp.agentsim.dev/mcpWhat mcp does
The server exposes AgentSIM tools to an AI assistant. open_challenge starts a session for a service you own, while wait_for_verdict returns the outcome, such as a code, a sign-in link, or a WebAuthn requirement. Other tools let you inspect SMS, end a session early, and view active sessions. Older tool names remain available for compatibility.
For HTTP connections, send x-api-key with every request; for stdio, set AGENTSIM_API_KEY in the process environment. Live SMS access requires exact-origin verification and an allow policy for a public HTTPS service you own. Only US is supported. Requests need an API key to pass authentication.
What it helps with
- start a verification session for an owned service
- wait for an SMS challenge result
- read a code from an incoming text
- release a number when a session ends
Example prompts for the agent
- Start an SMS sign-in check for my service and wait for its result.
- Show the code from the current challenge.
- Release the number after the verification is done.
How to install mcp
Platform CLI: remote server
claude mcp add --transport http mcp https://mcp.agentsim.dev/mcpPlatform CLI: remote server
codex mcp add agentsimdev-mcp --url https://mcp.agentsim.dev/mcpConfig file
{
"mcpServers": {
"agentsimdev-mcp": {
"url": "https://mcp.agentsim.dev/mcp"
}
}
}Config file
{
"servers": {
"agentsimdev-mcp": {
"type": "http",
"url": "https://mcp.agentsim.dev/mcp"
}
}
}Platform CLI: remote server
gemini mcp add -t http agentsimdev-mcp https://mcp.agentsim.dev/mcpStep by step, with commands for each platform: How to add an MCP server to Claude Code, Codex, Cursor, VS Code, Gemini CLI and more
Questions about mcp
How do I install mcp in Codex?
Run codex mcp add agentsimdev-mcp --url https://mcp.agentsim.dev/mcp. Set an API key in the connection configuration for authentication.
What does mcp do?
It connects an AI assistant to AgentSIM tools for starting challenge sessions and retrieving their outcomes. It can also read SMS and manage active sessions.
What is required for live SMS checks?
You need an API key. Live SMS works with public HTTPS services you own after exact-origin verification and an allow policy; the supported country is US.
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