mcp MCP server

mcp is a remote MCP server that gives an AI agent 7 tools, among them get_messages, list_numbers, open_challenge. It answers at https://mcp.agentsim.dev/mcp over streamable HTTP, and it listed its tools to an anonymous client, so no sign-in was needed for that. Our probes reached it 10 of 10 times since 5 September 2026; the last check, on 18 October 2026, succeeded.

Status

Answering

Tools

Official

yes, served from agentsim.dev

Reliability

10 of 10 checks

Response time

471 ms

Transport

streamable HTTP

Last checked

18 October 2026

Control plane for agent auth walls. Connector 0 handles SMS OTP with US test numbers.

Description as the publisher wrote it.

The 7 tools mcp offers

Tool	What it does
`get_messages`	List all SMS messages received in this session without consuming the OTP. Use this to inspect raw messages or check if an SMS arrived before calling wait_for_verdict. Does NOT mark the OTP as consumed. Inputs: input
`list_numbers`	List active challenge sessions, optionally filtered by agent_id. Use this to check for leaked sessions or inspect what is currently active. Inputs: agent_id
`open_challenge`	Open an authentication challenge session. Supports multiple channels: sms_otp (programmable US number), email_otp (mock inbox), magic_link (mock inbox), and webauthn_required (detect-and-halt). Returns the challenge identifier (phone number Inputs: input
`provision_number`	Open an SMS challenge session (alias for open_challenge with channel=sms_otp). DEPRECATED: Use `open_challenge` with channel="sms_otp" instead. This tool is kept for backward compatibility with existing MCP clients. Returns the phone number Inputs: input
`release_number`	Close a challenge session. Always call this when you are done — even on error — so the session does not keep consuming pool capacity. Inputs: input
`wait_for_otp`	Block until an SMS verdict arrives for this session (alias for wait_for_verdict). DEPRECATED: Use `wait_for_verdict` instead. This tool is kept for backward compatibility with existing MCP clients. Polls the AgentSIM API for up to `timeout_ Inputs: input
`wait_for_verdict`	Block until a challenge verdict arrives for this session. Polls the AgentSIM API for up to `timeout_seconds`. Returns the structured verdict, which may include: - otp_code: the parsed OTP (for sms_otp, email_otp channels) - magic_link: the Inputs: input

Add mcp to your AI client

Every block below points at https://mcp.agentsim.dev/mcp. Pick your client and copy.

Claude Code: one command in your terminal

claude mcp add --transport http mcp https://mcp.agentsim.dev/mcp

Claude Desktop: claude_desktop_config.json

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": ["-y", "mcp-remote", "https://mcp.agentsim.dev/mcp"]
    }
  }
}

Cursor: ~/.cursor/mcp.json, or .cursor/mcp.json in a project

{
  "mcpServers": {
    "mcp": {
      "url": "https://mcp.agentsim.dev/mcp"
    }
  }
}

VS Code and GitHub Copilot: .vscode/mcp.json

{
  "servers": {
    "mcp": {
      "type": "http",
      "url": "https://mcp.agentsim.dev/mcp"
    }
  }
}

Zed: Zed settings.json

{
  "context_servers": {
    "mcp": {
      "url": "https://mcp.agentsim.dev/mcp"
    }
  }
}

Windsurf: ~/.codeium/mcp_config.json

{
  "mcpServers": {
    "mcp": {
      "serverUrl": "https://mcp.agentsim.dev/mcp"
    }
  }
}

JetBrains AI Assistant: Settings, Tools, AI Assistant, MCP, New MCP Server, as JSON

{
  "mcpServers": {
    "mcp": {
      "url": "https://mcp.agentsim.dev/mcp"
    }
  }
}

Continue: .continue/mcpServers/neuronto.yaml

name: mcp
version: 0.0.1
schema: v1
mcpServers:
  - name: mcp
    type: streamable-http
    url: https://mcp.agentsim.dev/mcp

Gemini CLI: ~/.gemini/settings.json

{
  "mcpServers": {
    "mcp": {
      "httpUrl": "https://mcp.agentsim.dev/mcp"
    }
  }
}

Codex CLI: MCP server config

{
  "mcpServers": {
    "mcp": {
      "type": "http",
      "url": "https://mcp.agentsim.dev/mcp"
    }
  }
}

Warp: MCP servers, + Add, paste JSON

{
  "mcpServers": {
    "mcp": {
      "url": "https://mcp.agentsim.dev/mcp"
    }
  }
}

Goose: a one-click extension link

goose://extension?url=https%3A%2F%2Fmcp.agentsim.dev%2Fmcp&type=streamable_http&id=mcp&name=mcp

Is mcp up right now?

It answered our last check on 18 October 2026 in 471 ms. Over 10 checks since 5 September 2026 it answered 10. Status here comes from Neuronto's own probes, not from the publisher.

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Questions about mcp

Is there an official mcp MCP server?

Yes. It is published by agentsim.dev and served from mcp.agentsim.dev, the vendor's own domain: https://mcp.agentsim.dev/mcp.

How many tools does mcp have?

7, as returned by the server's own tools/list on 31 August 2026: get_messages, list_numbers, open_challenge, provision_number, release_number, wait_for_otp, wait_for_verdict.

Is mcp down?

It answered our last check on 18 October 2026 in 471 ms. Over 10 checks since 5 September 2026 it answered 10.

How do I add mcp to Cursor?

Put the server under mcpServers in ~/.cursor/mcp.json with the URL https://mcp.agentsim.dev/mcp. The exact JSON is above, with the same setup for Claude Code, Claude Desktop, VS Code, Windsurf, Zed, Gemini CLI and the rest.

Does mcp need an API key?

It listed its tools to an anonymous client, so reading the tool list needs no key. Individual tools can still ask for credentials in their own inputs.

Where this comes from

Publisher: dev.agentsim. Endpoint host: mcp.agentsim.dev. ARD identifier: urn:air:dev.agentsim:mcp:mcp. First indexed 31 August 2026. The tools are exactly what the server returned; nothing on this page is inferred from its name. Ranking in Neuronto search is never for sale.

Is this your server? Get a message the day it stops answering or its tools change: monitoring, 14 days free. Or claim the domain to manage how it is listed.