GateCheck by LarryBuildsAI

Connect Remote server

claude mcp add --transport http gatecheck https://proofbeforepay.vercel.app/gatecheck/mcp --header "Authorization: Bearer <YOUR_API_KEY>"

{
  "mcpServers": {
    "gatecheck": {
      "url": "https://proofbeforepay.vercel.app/gatecheck/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

{
  "servers": {
    "gatecheck": {
      "type": "http",
      "url": "https://proofbeforepay.vercel.app/gatecheck/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_API_KEY>"
      }
    }
  }
}

Settings > Connectors > Add custom connector
URL: https://proofbeforepay.vercel.app/gatecheck/mcp

Replace the values in angle brackets with your own. Keys stay on your machine; we never see them.

Tools 6 found in our last check

• boundary_guard_check

  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.

• 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_url plus expected_resources, to get a readiness score, issues, and fixes; no private endpoints are called.

• 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/asset/price to verify payment metadata and receive a deterministic health receipt.

• check_agent_tool_readiness

  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_ur…

• generate_x402_launch_pack

  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…

• generate_trust_receipt

  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.

Headers

Details

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  Check citations and retractions by DOI, and see the x402 price an AI agent pays to cite a source.

• NextConstraint

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