PREFLIGHT — URL Routing for AI Agents MCP Server

by gsterlingpress Your server? Claim it

answering

PREFLIGHT — URL Routing for AI Agents is answering right now. Last checked 15 min ago. It exposes 2 tools. Last commit 27 Aug 2026.

Choose HTTP, browser, machine endpoint, or avoid before an agent visits an unfamiliar URL.

Uptime history 22 days of history

22 days agonow

100.0%

Uptime 24h

91 of 91 checks

Tools

read from the server

372 ms

Response time

average over 24h

Stars

last commit 27 Aug 2026

Nothing serious here today

Today is the operative word: we check PREFLIGHT — URL Routing for AI Agents every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 15 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add preflight --transport http https://preflight-api-production-01a2.up.railway.app/mcp

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

{
  "mcpServers": {
    "preflight": {
      "url": "https://preflight-api-production-01a2.up.railway.app/mcp"
    }
  }
}

~/.codex/config.toml

[mcp_servers.preflight]
url = "https://preflight-api-production-01a2.up.railway.app/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "preflight": {
      "url": "https://preflight-api-production-01a2.up.railway.app/mcp"
    }
  }
}

.vscode/mcp.json

{
  "mcpServers": {
    "preflight": {
      "url": "https://preflight-api-production-01a2.up.railway.app/mcp"
    }
  }
}

Available tools 2

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

preflight

preflight_check

Before fetching, crawling, scraping, opening, or browser-rendering an unfamiliar http/https URL, call this with the ACTUAL destination URL. Returns the best first route: HTTP, BROWSER, MACHINE_ENDPOINT, or AVOID, plus access/JS/size/cost hints. Do not substitute example.com when a real task URL is available.

preflight_feedback

After following a PREFLIGHT recommendation, report whether the chosen route worked so PREFLIGHT can improve future recommendations.

Endpoints

URL	Transport	State	Latency	Checked
https://preflight-api-production-01a2.up.railway.app/mcp	streamable-http	answering	348 ms	15 min ago

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PREFLIGHT — URL Routing for AI Agents — questions

Answers built from our own checks of this server.

What can PREFLIGHT — URL Routing for AI Agents do?

It exposes 2 tools, read directly from the server on our last check. Among them: preflight_check, preflight_feedback. 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 PREFLIGHT — URL Routing for AI Agents working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 91 of 91 checks got a reply (100.0%), average response time 372 ms. The bar chart above shows every period we have measured.

How do I connect PREFLIGHT — URL Routing for AI Agents?

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 — URL Routing for AI Agents need an API key?

No. PREFLIGHT — URL Routing for AI Agents completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 2 of them are readable on this page. This is what we observed, not what the docs claim.

How fast is PREFLIGHT — URL Routing for AI Agents?

It answers our handshake in 372 ms on average, which is faster than 48% of all working MCP servers we measure. The comparison comes from our own checks across the whole registry, every 15 minutes.

Is PREFLIGHT — URL Routing for AI Agents open source?

Yes — written in JavaScript, 0 stars on GitHub and 1 open issue. The source link is on this page, so you can read exactly what it does with your data before you connect it.