Preflight

{
  "mcpServers": {
    "com.allthepossibles/preflight": {
      "url": "https://preflight.allthepossibles.com/mcp"
    }
  }
}

Indexed tools

Tool metadata and schemas come from the remote server and are untrusted. Indexing only lists tools; it never calls them.

4 shown · authentication unknown

• Check output

  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 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.

  Schema valid · SHA-256 fc2c1ba9b8ed…

  View input schema

  {
    "type": "object",
    "properties": {
      "output": {
        "description": "The output to check, a JSON string, or an already-parsed value"
      },
      "expectedFields": {
        "type": "array",
        "items": {
          "type": "string"
        },
        "description": "Optional: top-level field names expected to be present and non-empty"
      }
    },
    "required": [
      "output"
    ]
  }

• Scan content

  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 raw text you already have.

  Schema valid · SHA-256 e5b54833ecee…

  View input schema

  {
    "type": "object",
    "properties": {
      "url": {
        "type": "string",
        "description": "A page to fetch and scan"
      },
      "content": {
        "type": "string",
        "description": "Raw text to scan directly, if not fetching a URL"
      }
    }
  }