Preflight Checks (x402) MCP Server

by josediegorobles Your server? Claim it

not responding

Preflight Checks (x402) is listed as active in the registry but did not answer our last check. 18 installs a week from npm.

Deterministic pre-execution verification tools for AI agents with x402 USDC pay-per-call on Base

The linked repository no longer exists on GitHub — it was deleted or made private.

Installs per day peak 153 · avg 10 · -90% w/w

a month agotoday

Uptime history 19 days of history · worst day 0%

19 days agonow

0.0%

Uptime 24h

0 of 92 checks

—

Tools

hidden behind auth

411 ms

Response time

average over 24h

Installs / week

npm and PyPI

Preflight Checks (x402) does not always answer

Over the last week it answered 0.0% 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 8 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add preflight-checks --transport http https://preflight-checks--jd-robles.run.tools

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

{
  "mcpServers": {
    "preflight-checks": {
      "url": "https://preflight-checks--jd-robles.run.tools"
    }
  }
}

~/.codex/config.toml

[mcp_servers.preflight-checks]
url = "https://preflight-checks--jd-robles.run.tools"

.cursor/mcp.json

{
  "mcpServers": {
    "preflight-checks": {
      "url": "https://preflight-checks--jd-robles.run.tools"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "preflight-checks": {
      "url": "https://preflight-checks--jd-robles.run.tools"
    }
  }
}

This one needs environment variables set before it will start: PREFLIGHT_BUYER_PRIVATE_KEY (Private key of a Base wallet holding USDC, used to pay each call via x402 (0.05 USDC per check).), PREFLIGHT_BASE_URL (API base URL. Defaults to https://preflight402.com.). The author declared them in the registry entry; get the values from the project itself.

Endpoints

URL	Transport	State	Latency	Checked
https://preflight-checks--jd-robles.run.tools	streamable-http	answering	411 ms	8 min ago

Alternatives to Preflight Checks (x402)

same job, measured the same way

Oromi Agent Services

by oromi-uk

25 pay-per-call UK data & verification tools for AI agents. x402 USDC on Base; free quote mode.

45 installs/wk local only

Agent Verification Utility

by kgninja-agent-economy

Deterministic JSON checks with signed evidence and x402-paid execution

5 tools answering

xytara MCP Executor

by naxytra

Pay-per-call MCP tools for agents, settled with x402 (USDC on Base mainnet). No API keys.

17 tools answering

Agent Revenue Network

by workers-nadirventurelabs-agent-revenue-network

Paid deterministic data-quality and execution-verification tools for AI agents.

13 tools answering

x402-vend — WebIntel

by omarnassar1127

Pay-per-call web & EU business intelligence for AI agents (x402 USDC on Base). 11 tools.

11 tools answering

AgentScrape

by hshintelligence

Pay-per-call web scraping for AI agents via x402 on Base USDC. Six tools, no signup.

6 tools answering

Agentreader MCP

by ajanani1

11 pay-per-call web tools for AI agents, auto-paid in USDC on Base via x402. No API keys.

20 installs/wk local only

Agishub

by agishub

AgisHub — 34 pay-per-call tools for AI agents over x402 (USDC on Base). No API key, no signup.

17 installs/wk 34 tools answering

Preflight Checks (x402) — questions

Answers built from our own checks of this server.

Is Preflight Checks (x402) working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 92 checks got a reply (0.0%), average response time 411 ms. The bar chart above shows every period we have measured.

Is Preflight Checks (x402) still maintained?

The linked repository no longer exists on GitHub — it was deleted or made private. We show this because it changes what you can expect: an unmaintained server may keep answering for months and then stop without warning.

The registry lists Preflight Checks (x402) as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Preflight Checks (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 Preflight Checks (x402) need an API key?

No. Preflight Checks (x402) completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. This is what we observed, not what the docs claim.

How many people use Preflight Checks (x402)?

The npm package @joserobles/preflight-mcp was installed 18 times in the last week. Week over week that is -90%. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.