Boundary Guard x402 MCP Server

by larrylemonbot Your server? Claim it

answering

Boundary Guard x402 is answering right now. Last checked 9 min ago. It exposes 6 tools.

MCP tools for x402 readiness, paid-path probes, launch packs, and trust receipts.

Uptime history 48 days of history · worst day 30%

48 days agonow

82.4%

Uptime 24h

75 of 91 checks

Tools

read from the server

228 ms

Response time

average over 24h

open, no key

Access

streamable-http

Boundary Guard x402 does not always answer

Over the last week it answered 93.9% of our checks. We check every 15 minutes, so you hear about the next outage within the hour — not from your users.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 9 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add boundary-guard-x402 --transport http https://x402-resource-scanner.vercel.app/mcp

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "boundary-guard-x402": {
      "url": "https://x402-resource-scanner.vercel.app/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.boundary-guard-x402]
url = "https://x402-resource-scanner.vercel.app/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "boundary-guard-x402": {
      "url": "https://x402-resource-scanner.vercel.app/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "boundary-guard-x402": {
      "url": "https://x402-resource-scanner.vercel.app/mcp"
    }
  }
}

Available tools 6

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

generate

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.

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 evidence. Tiers: single $9, service $29, premium $49.

agent

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_url, expected_resources, and paid_path; deep/report tiers add unpaid 402 probing when paid_path is supplied. Tiers: quick $1, deep $5, report $10.

boundary

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.

probe

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.

scan

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.

Endpoints

URL	Transport	State	Latency	Checked
https://x402-resource-scanner.vercel.app/mcp	streamable-http	answering	227 ms	9 min ago

Alternatives to Boundary Guard x402

same job, measured the same way

ServerCard Trust MCP

by servercardtrust

Paid remote MCP for server-card validation, auth checks, trust packets, and readiness.

answering

Liveauth MCP

by dulzuradev

MCP server for LiveAuth: PoW + Lightning auth, L402 bundles, and paid MCP tool receipts.

246 installs/wk local only

GateCheck by LarryBuildsAI

by larrylemonbot

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

6 tools answering

LION Trend Intent MCP

by lionmaster20

Read-only x402-paid trend-intent MCP tools for JSON and CSV signals.

5 tools answering

Yieldagentx402

by fabio662

Policy-gated x402 MCP for agent workflows with TEE receipts, 18 tools, and no custody.

82 installs/wk local only

LaunchCheck x402

by apolito53

Paid x402 MCP tool for stress-testing launch and marketing copy before publication.

1 tools answering

Zaira Labs Guide

by zairalabs

Trust signals for AI agents: an open agent-readiness standard and developer tool guide. Read-only.

5 tools answering

Viberaven

by ohad6k

VibeRaven MCP for production-readiness checks and Launch Autopilot next actions

89 installs/wk local only

Boundary Guard x402 — questions

Answers built from our own checks of this server.

What can Boundary Guard x402 do?

It exposes 6 tools, read directly from the server on our last check. Among them: boundary_guard_check, check_agent_tool_readiness, generate_trust_receipt, generate_x402_launch_pack, probe_x402_paid_path, scan_x402_resource. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

Is Boundary Guard x402 working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 75 of 91 checks got a reply (82.4%), average response time 228 ms. The bar chart above shows every period we have measured.

How do I connect Boundary Guard x402?

Copy the ready config from this page — we generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each with the file path that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Boundary Guard x402 need an API key?

No. Boundary Guard x402 completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 6 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is Boundary Guard x402?

It answers our handshake in 228 ms on average, which is faster than 62% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.