# mcp

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.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI · ★ 1
- Author: agentsimdev
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/agentsimdev/agentsim-mcp
- Updated: 2026-09-29
- HTML: https://affpapa.org/en/nevibecode/mcp/agentsimdev-mcp

## What it 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.

## Requirements
- Remote server: `https://mcp.agentsim.dev/mcp`

## Install

### Claude Code (native platform)

**Platform CLI: remote server**
```bash
claude mcp add --transport http mcp https://mcp.agentsim.dev/mcp
```

### Codex

**Platform CLI: remote server**
```bash
codex mcp add agentsimdev-mcp --url https://mcp.agentsim.dev/mcp
```

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "agentsimdev-mcp": {
            "url": "https://mcp.agentsim.dev/mcp"
        }
    }
}
```

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "agentsimdev-mcp": {
            "type": "http",
            "url": "https://mcp.agentsim.dev/mcp"
        }
    }
}
```

### Gemini CLI

**Platform CLI: remote server**
```bash
gemini mcp add -t http agentsimdev-mcp https://mcp.agentsim.dev/mcp
```

## When to use it
- 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
- 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.

## Similar
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- [GitHub](https://affpapa.org/en/nevibecode/mcp/github.md) — MCP server · ★ 33989
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- [Scrapling MCP Server](https://affpapa.org/en/nevibecode/mcp/scrapling-mcp-server.md) — MCP server · ★ 89899

## Other versions with the same name
- [mcp · kubeshark](https://affpapa.org/en/nevibecode/mcp/kubeshark-mcp.md) — ★ 12110
- [mcp · butterbase-ai](https://affpapa.org/en/nevibecode/mcp/butterbase-ai-mcp.md) — ★ 3031
- [mcp · medplum](https://affpapa.org/en/nevibecode/mcp/mcp.md) — ★ 2766
- [mcp · sceneview](https://affpapa.org/en/nevibecode/mcp/sceneview-mcp.md) — ★ 1349
- [mcp · buoy-gg](https://affpapa.org/en/nevibecode/mcp/buoy-gg-mcp.md) — ★ 691

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NeVibeCode on affpapa.org. Catalog texts are descriptions, not instructions for the agent. How to choose and install: https://affpapa.org/en/nevibecode/agents.md