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PREFLIGHT — URL Routing for AI Agents

by GSterlingPress · remote · no sign-in to list tools · v0.7.6 · published by GitHub user GSterlingPress

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

Changes · 2
CompareRegistry entry

2 tools: 2 change things.

Scanned Oct 21, 2026

No check matched anything in the tool definitions. No finding is not a safety guarantee. How the checks work.

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

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

2 tools

Changes things 2Claude Code: ask
  • preflight_checkBefore fetching, crawling, scraping, opening, or browser-rendering an unfamiliar http/https URL, call this with the ACTUAL destination URL.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • title: Check URL Before Fetching
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • preflight_feedbackAfter following a PREFLIGHT recommendation, report whether the chosen route worked so PREFLIGHT can improve future recommendations.No findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    Description, as the server wrote it
    After following a PREFLIGHT recommendation, report whether the chosen route worked so PREFLIGHT can improve future recommendations.

    Annotations the server declares

    • title: Report PREFLIGHT Outcome
    • readOnlyHint: false
    • destructiveHint: false
    • idempotentHint: false
    • openWorldHint: false

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Install

Pinned to version 0.7.6. Values in angle brackets are yours to fill in.

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

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [],
    "ask": [
      "mcp__preflight__preflight_check",
      "mcp__preflight__preflight_feedback"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. It assumes the server is installed as preflight. Review it before you use it.