Preflight

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

• Connection: Runs in the cloud
• Transport: Streamable HTTP
• Category: Cybersecurity
• You need to fill in: Authorization

Install

Pick the AI app you use, then copy the settings.

You need

• Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

claude mcp add --transport http preflight https://preflight.allthepossibles.com/mcp --header 'Authorization: your-value'

{
  "mcpServers": {
    "preflight": {
      "url": "https://preflight.allthepossibles.com/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

{
  "servers": {
    "preflight": {
      "type": "http",
      "url": "https://preflight.allthepossibles.com/mcp",
      "headers": {
        "Authorization": "your-value"
      }
    }
  }
}

Your choice stays on this device in a cookie; no account needed.

Values you fill in

• Authorization secret HTTP header
  Optional. Bearer pf_... for Basic or Pro; the structural checks work with no key. Install steps per client: https://preflight.allthepossibles.com/docs#install

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Tool names and descriptions exactly as the server reported them on Nov 7, 2026. The maker wrote them, not us; we show them as plain text.

• scan_mcp_server

  Check an MCP server for real risk signals before trusting it: unauthenticated transport, capability overreach (filesystem/shell/credential access with no scoping), and known-bad signatures. Pass a live server URL, or a manifest of tool definitions if the server isn't reachable ov

• scan_content

  Check a document or web page for hidden instructions before an agent reads, summarizes, or acts on it: invisible Unicode, obfuscated payloads, and (on Pro) a semantic pass for prompt-injection phrasing aimed at the model instead of the human reader. Pass either a URL to fetch, or

• scan_extension

  Check a VS Code extension or a Claude Skill before installing or trusting it. For a VS Code extension (which runs with full Node.js access and no permission model to scope): publisher domain-verification status weighed against install count, and known-bad-signature checks on its

• check_output

  Check a structured output you're about to return or act on for degenerate-answer patterns a schema check can't see: invalid JSON, a placeholder value ('TBD', 'N/A', 'unknown') where a real answer should be, an array of byte-identical items (a common symptom of a loop that never a

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 9, 2026

• ! Caution

  Maker matches the repo

  The registry lists no source repo, so we cannot match the publisher (allthepossibles.com) to the code

• … Not checked yet

  Still maintained

  We have not read this repo from GitHub yet

• … Not checked yet

  Has a licence

  We have not read this repo from GitHub yet

• ✓ Pass

  Endpoint responds

  Responded in 88 ms (HTTP 200)

• – Not applicable

  Sign-in with OAuth

  No sign-in needed

• ✓ Pass

  No hidden instructions in tool descriptions

  Read 4 tool descriptions and found no hidden instructions to the AI

Compared with others in Cybersecurityi

• More stars than 0% of the other 1003 servers in this category
• Published to the registry more recently than 79% of the other 1003 servers in this category
• Basic checks equal to or better than 33% of the other 1003 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:↓ Downloads per weeki★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

README from the maker

No README found in the repo