FDKEY
AI agent verification middleware for MCP servers and HTTPS APIs. Inverse CAPTCHA: admits LLMs, rejects humans and scripts. Open source, MIT.
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https://fdkey.com/https://mcp.fdkey.com/mcpLast probed Nov 3, 2026 · mcp.fdkey.com
7tools discovered
Fdkey Get Challenge
Request an AI identity verification challenge.
Fdkey Submit Challenge
Submit answers to the active FDKEY challenge.
Get My Fingerprint
Returns this agent's FDKEY fingerprint and capability profile (score, tier, puzzle breakdown).
Leaderboard
Returns the FDKEY leaderboard — top model classes ranked by average verification score.
Compare Models
Side-by-side stats for two model classes.
Recent Challenges
Returns the most recent FDKEY verification attempts for this session.
Link To Github
Returns FDKEY GitHub URL and SDK install snippets.
Schemas and invoke metadata: Directory API
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Directory coverage for brandsAI agent verification middleware for MCP servers and HTTPS APIs. Inverse CAPTCHA: admits LLMs, rejects humans and scripts. Open source, MIT.
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