MCP server

GateCheck by LarryBuildsAI

io.github.LarryLemonBot/gatecheck

Checked 25 Oct 2026, 20:29 UTC · Connected to it and listed its tools

One-cent x402 and MCP readiness checks plus fixed-price marketplace launch packs.

Website Source

At a glance

Type

MCP server

Publisher

Not verified

Status

Working at last check

Tools

6

Token cost

About 1,920 tokens per request

Sets up in

Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok

Last checked

25 Oct 2026, 20:29 UTC

Connect it to your agent

Add to CursorAdd to VS CodeVS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http gatecheck https://proofbeforepay.vercel.app/gatecheck/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.gatecheck]
url = "https://proofbeforepay.vercel.app/gatecheck/mcp"

Gemini CLI

{"mcpServers":{"gatecheck":{"httpUrl":"https://proofbeforepay.vercel.app/gatecheck/mcp"}}}

Cursor

{"mcpServers":{"gatecheck":{"url":"https://proofbeforepay.vercel.app/gatecheck/mcp"}}}

VS Code

{"servers":{"gatecheck":{"type":"http","url":"https://proofbeforepay.vercel.app/gatecheck/mcp"}}}

Antigravity

agy mcp add gatecheck https://proofbeforepay.vercel.app/gatecheck/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"gatecheck","server_url":"https://proofbeforepay.vercel.app/gatecheck/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"gatecheck","server_url":"https://proofbeforepay.vercel.app/gatecheck/mcp"}

Tools

• boundary_guard_check ~214 tokens
  Create a deterministic, read-only pre-action receipt from request, policy, and optional result evidence. Use before an agent posts, spends, lists, or writes so the decision can be audited; no external action is executed.
• check_agent_tool_readiness ~408 tokens
  GateCheck readiness: check whether an x402/agent-facing tool is ready for agent routing, marketplace listing, and paid-path monitoring, including public agent discovery surfaces (/llms.txt, /agents.txt, /.well-known/mcp.json, /mcp). Pass target plus optional tier, marketplace_url, expected_resources
• generate_trust_receipt ~331 tokens
  Generate a deterministic trust receipt from sanitized request/policy/result/payment summaries. Do not submit raw auth headers, cookies, API keys, private keys, payment signatures, payment response headers, customer prompts, customer documents, or payer-identifying evidence.
• generate_x402_launch_pack ~503 tokens
  Generate marketplace-safe launch assets for an x402/MCP seller: listing copy, buyer FAQ, checklist, approval packet, and claim boundaries. Pass target plus optional product_name, audience, primary_use_case, marketplace_url, and paid_path; service/premium tiers include readiness evidence. Tiers: sing
• probe_x402_paid_path ~270 tokens
  Probe a public x402 paid endpoint without signing or paying, then parse the HTTP 402 challenge. Pass target plus optional expected network/asset/price to verify payment metadata and receive a deterministic health receipt.
• scan_x402_resource ~194 tokens
  Read-only scan of a public API/provider URL for x402, OpenAPI, pricing, and agent-discovery metadata. Pass url, and optionally marketplace_url plus expected_resources, to get a readiness score, issues, and fixes; no private endpoints are called.

Browse

• GitHub tools
• OpenAPI tools
• Payments
• GitHub and code hosting
• APIs and testing

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