The Vizier MCP server,
connected in one click.
Deterministic authorization for one proposed AI agent action, returned with a signed receipt. Connect the official Vizier 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 Vizier 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 vizier https://vizier.vassiliy-lakhonin.workers.dev/mcpRun in your terminal, then restart Claude Code.
Vizier · https://vizier.vassiliy-lakhonin.workers.dev/mcp
What your AI can do with Vizier
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “vizier_verify_action”: Evaluate whether an AI agent should be allowed to perform a proposed action.”
How secure is the Vizier MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Vizier holds up.
Security grade A
gate scanned 1 tools on Oct 7, 2026 for prompt injection and risky tool definitions — nothing to flag.
- lowvizier_verify_action: Unusually long tool description
Official endpoint
Operated by Vizier (workers.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 Vizier 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 Vizier
Choose Vizier in the gate directory. No sign-in needed.
Use it anywhere
Vizier'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 Vizier exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
vizier_verify_action — Evaluate whether an AI agent should be allowed to perform a proposed action.
Who runs the Vizier MCP server?
The Vizier MCP server at a glance
https://vizier.vassiliy-lakhonin.workers.dev/mcpQuestions, answered
Is there an official Vizier MCP server?
Yes — Vizier operates its own remote MCP server at vizier.vassiliy-lakhonin.workers.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 Vizier to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Vizier in the directory. No account or sign-in is needed. From then on, Vizier's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Vizier runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Vizier 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 Vizier in minutes. No credit card required.
Connect more than just Vizier
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Vizier in: Claude · Claude Code · ChatGPT · Cursor · VS Code