The MCP MCP server,
connected in one click.
Control plane for agent auth walls. Connector 0 handles SMS OTP with US test numbers. Connect the official MCP MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add MCP to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http mcp-118 https://mcp.agentsim.dev/mcpRun in your terminal, then restart Claude Code.
MCP · https://mcp.agentsim.dev/mcp
What your AI can do with MCP
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “open_challenge”: Open an authentication challenge session. Supports multiple channels: sms_otp (programmable US number), email_otp (mock inbox), magic_link.”
“Use “provision_number”: Open an SMS challenge session (alias for open_challenge with channel=sms_otp). DEPRECATED: Use `open_challenge` with channel="sms_otp" inst.”
“Use “wait_for_verdict”: Block until a challenge verdict arrives for this session. Polls the AgentSIM API for up to `timeout_seconds`. Returns the structured verdic.”
“Use “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.”
How secure is the MCP MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how MCP holds up.
Official endpoint
Operated by MCP (agentsim.dev) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If MCP adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick MCP
Choose MCP in the gate directory. No sign-in needed.
Use it anywhere
MCP's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools MCP exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
open_challenge — Open an authentication challenge session. Supports multiple channels: sms_otp (programmable US number), email_otp (mock inbox), magic_link
provision_number — Open an SMS challenge session (alias for open_challenge with channel=sms_otp). DEPRECATED: Use `open_challenge` with channel="sms_otp" inst
wait_for_verdict — Block until a challenge verdict arrives for this session. Polls the AgentSIM API for up to `timeout_seconds`. Returns the structured verdic
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
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 befor
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.
list_numbers — List active challenge sessions, optionally filtered by agent_id. Use this to check for leaked sessions or inspect what is currently active.
Who runs the MCP MCP server?
The MCP MCP server at a glance
https://mcp.agentsim.dev/mcpQuestions, answered
Is there an official MCP MCP server?
Yes — MCP operates its own remote MCP server at mcp.agentsim.dev. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect MCP to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick MCP in the directory. No account or sign-in is needed. From then on, MCP's tools are available in every client you've connected to gate.
Do I need to host anything?
No. MCP runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the MCP MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect MCP in minutes. No credit card required.
Connect more than just MCP
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up MCP in: Claude · Claude Code · ChatGPT · Cursor · VS Code