LinkPreflight

io.github.linkpreflightPublished by GitHub account linkpreflightv0.1.0Updated Oct 29, 2026

Check a URL before an agent clicks or cites it: status, redirects, dead/parked, phishing flags.

The publisher's own server: Preflight

VerifiedStreamable HTTPWeb executableWeb Search & Scraping Security & Monitoring

Server details

Identifier: io.github.linkpreflight/linkpreflight
Transport: Streamable HTTP
Runtime: Web executable
Trust: Verified
Published: Oct 22, 2026

Security note

MCP servers receive tool arguments from a conversation and may perform external actions. Review what a server can do before you enable it, and give it only the access it needs.

The registry verified the GitHub account linkpreflight for this listing. That does not show the account is the product's maker.

SourceWeft's checks cover whether the listing is complete and the endpoint answered; they do not review the server's code or what its tools do.

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Overview

AI-generated overview

Remote MCP server that lets an assistant vet a URL before clicking, citing or fetching it, returning status, redirects, dead/parked domains and phishing flags.

What you can do: Check a single URL in one call before the assistant clicks, cites or fetches it
Get HTTP status, redirect chain and final destination URL
See dead or parked-domain detection, content type and size
Check whether an llms.txt file exists at the site
Review phishing and abuse flags from public feeds plus heuristics
No page content extraction is performed
When to use it: Useful when an assistant gathers links from search results, emails or documents and needs to confirm they are live and not malicious before citing or opening them. It is a quick pre-check rather than a crawler or content extractor.
Requirements: A remote MCP endpoint at linkpreflight.dev/mcp over streamable HTTP; no local package, account or API key is declared. A free tier allows 200 checks per day, with paid check packs available.

Before you install

The free tier is capped at 200 checks per day and larger volumes require paid packs, so costs can accrue. URLs submitted for checking are sent to a third-party service, and the phishing verdicts come from public feeds and heuristics, so they should not be treated as authoritative.

Installation

In SourceWeft

Open LinkPreflight in the dashboard and add it to a workspace.
Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.linkpreflight%2Flinkpreflight/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "linkpreflight": {
      "type": "http",
      "url": "https://linkpreflight.dev/mcp"
    }
  }
}

README

LinkPreflight

A remote MCP server and API for AI agents. One preflight(url) call tells you whether a link is safe, live, and what's behind it (status, redirects, dead or parked, phishing flags, content type, llms.txt) before your agent clicks or fetches it.

Site and docs: https://linkpreflight.dev
MCP endpoint: https://linkpreflight.dev/mcp
API: GET https://linkpreflight.dev/v1/preflight?url=example.com
Free: 200 checks a day. Packs: $10 for 25,000 checks.

Pairs well with

Clearcrawl, from our studio: once a URL passes preflight, Clearcrawl turns it into clean markdown or JSON.
VibePicks, from our studio: one clear verdict per AI dev-tool job.

Source: README.md at commit 87e7ceb

Tools

preflight

Link Preflight

Check a URL before you click, cite, or fetch it. Returns HTTP status, redirect chain and final URL, dead/parked-domain detection, content-type and size, whether /llms.txt exists, and phishing/abuse flags from public feeds plus heuristics. One call, no page content extraction. Free: 200 checks/day.

Parametersurlrequired

Version history

v0.1.0LatestOct 22, 2026

Score

100% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.