Community · Official remote MCP server

The GateCheck by LarryBuildsAI MCP server,
connected in one click.

One-cent x402 and MCP readiness checks plus fixed-price marketplace launch packs. Connect the official GateCheck by LarryBuildsAI MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect GateCheck by LarryBuildsAI free How it works

Free to start · No credit card · No hosting needed

Use this server

Add GateCheck by LarryBuildsAI 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 gatecheck-by-larrybuildsai https://proofbeforepay.vercel.app/gatecheck/mcp

Run in your terminal, then restart Claude Code.

GateCheck by LarryBuildsAI · https://proofbeforepay.vercel.app/gatecheck/mcp

What you can do

What your AI can do with GateCheck by LarryBuildsAI

Real prompts you can type the moment it's connected — no setup, no docs to read.

“Use “boundary_guard_check”: Create a deterministic, read-only pre-action receipt from request, policy, and optional result evidence. Use before an agent posts, spends,.”

“Use “scan_x402_resource”: Read-only scan of a public API/provider URL for x402, OpenAPI, pricing, and agent-discovery metadata. Pass url, and optionally marketplace_u.”

“Use “probe_x402_paid_path”: Probe a public x402 paid endpoint without signing or paying, then parse the HTTP 402 challenge. Pass target plus optional expected network/a.”

“Use “check_agent_tool_readiness”: GateCheck readiness: check whether an x402/agent-facing tool is ready for agent routing, marketplace listing, and paid-path monitoring, incl.”

Security check

How secure is the GateCheck by LarryBuildsAI MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how GateCheck by LarryBuildsAI holds up.

✓ Verified directory serverGateCheck by LarryBuildsAI · vercel.app

Official endpoint

Operated by GateCheck by LarryBuildsAI (vercel.app) 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 GateCheck by LarryBuildsAI adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Run the free scanner on GateCheck by LarryBuildsAI's server →

How it works

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 GateCheck by LarryBuildsAI

Choose GateCheck by LarryBuildsAI in the gate directory. No sign-in needed.

Use it anywhere

GateCheck by LarryBuildsAI's tools are live in every AI client you've connected — with rules and logging built in.

Connect GateCheck by LarryBuildsAI free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools GateCheck by LarryBuildsAI exposes

Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.

boundary_guard_check — Create a deterministic, read-only pre-action receipt from request, policy, and optional result evidence. Use before an agent posts, spends,

scan_x402_resource — Read-only scan of a public API/provider URL for x402, OpenAPI, pricing, and agent-discovery metadata. Pass url, and optionally marketplace_u

probe_x402_paid_path — Probe a public x402 paid endpoint without signing or paying, then parse the HTTP 402 challenge. Pass target plus optional expected network/a

check_agent_tool_readiness — GateCheck readiness: check whether an x402/agent-facing tool is ready for agent routing, marketplace listing, and paid-path monitoring, incl

generate_x402_launch_pack — Generate marketplace-safe launch assets for an x402/MCP seller: listing copy, buyer FAQ, checklist, approval packet, and claim boundaries. P

generate_trust_receipt — Generate a deterministic trust receipt from sanitized request/policy/result/payment summaries. Do not submit raw auth headers, cookies, API

Author

Who runs the GateCheck by LarryBuildsAI MCP server?

vercel.app

Homepage More servers from vercel.app →

Own this server? Claim the listing →

Server facts

The GateCheck by LarryBuildsAI MCP server at a glance

Endpointhttps://proofbeforepay.vercel.app/gatecheck/mcp

Operated byGateCheck by LarryBuildsAI (vercel.app)

CategoryCommunity

Sign-inNone — public data only

Available in gateYes — one-click connect

Works withClaude, ChatGPT, Cursor & any MCP client

FAQ

Questions, answered

Is there an official GateCheck by LarryBuildsAI MCP server?

Yes — GateCheck by LarryBuildsAI operates its own remote MCP server at proofbeforepay.vercel.app. 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 GateCheck by LarryBuildsAI to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick GateCheck by LarryBuildsAI in the directory. No account or sign-in is needed. From then on, GateCheck by LarryBuildsAI's tools are available in every client you've connected to gate.

Do I need to host anything?

No. GateCheck by LarryBuildsAI runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the GateCheck by LarryBuildsAI 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.