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Preflight

Scans an MCP server for security gaps before your agent connects.

Connector by allthepossibles.com · Domain verified by the MCP Registry

IndexedLicense unknownRemote (HTTP)
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Install

Works with Claude Code, VS Code, Cursor, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install connector/allthepossibles-com-preflight

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

Remote endpoint

  • https://preflight.allthepossibles.com/mcp Remote (HTTP)

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About

Scans an MCP server for security gaps before your agent connects. Free tier, no signup.

No reviews yet. Installed it? Reviews come from verified installers only. How reviews work

Permissions

What this server can do and what it asks for, from its tool list and install config. Checked Oct 25, 2026.

Tools
4 read · 0 write · 0 deleteRead-only
Secrets
None asked for
Install scripts
Nothing to install (hosted)
Runs as
Hosted (remote endpoint)

Tools by what they do 4

From the running server's own tool list (tools/list) on Oct 25, 2026.

Read 4 · Look things up without changing anything.

  • check_output
  • scan_content
  • scan_extension
  • scan_mcp_server

Network hosts it talks to 1

  • preflight.allthepossibles.com · found in remote endpoint, install command

Tools (4)

As the server listed them on Oct 25, 2026. Descriptions are the server’s own words; hidden characters are shown as [U+…].

  • check_outputCheck outputread-only

    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 advanced), or an expected field that's missing or empty. Schema validity and answer quality are different guarantees, call this before trusting your own output, not just after validating it parses.

  • scan_contentScan contentread-only

    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 raw text you already have.

  • scan_extensionScan extensionread-only

    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 description. For a Claude Skill: hidden-instruction and obfuscated-payload detection on the SKILL.md body (the same engine scan_content uses), unscoped or credential-referencing tool grants in its allowed-tools/disallowed-tools frontmatter, inline shell execution baked into the file itself, and pattern matching on any …

  • scan_mcp_serverScan MCP serverread-only

    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 over HTTP. Semantic prompt-injection detection runs too if a Pro API key is sent as an Authorization: Bearer header, see /docs.

Signals

Last release
Oct 19, 2026 (10 days ago)

Details

Registry name
com.allthepossibles/preflight
Version
1.0.0
Auth
Auth not stated
License
License unknown
First seen
Oct 24, 2026
Last checked
Oct 25, 2026

More from allthepossibles.com

Cite this page

Preflight MCP server. Agent Mart. https://agentmart.dev/connectors/allthepossibles-com-preflight (last updated 2026-10-25)