FDKEY
AI agent verification middleware for MCP servers and HTTPS APIs. Inverse CAPTCHA: admits LLMs, rejects humans and scripts. Open source, MIT.
https://fdkey.com/Opens ChatGPT on the web or desktop and asks it to use the WebMCP tools available here.
Connect straight to this server’s public endpoint.
https://mcp.fdkey.com/mcpWe add this server to your workspace, then open Studio — saved access, one connection to many servers, with a history of what ran.
Last probed Sep 18, 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.
Get your MCP into directories
A working endpoint is step one. Directory coverage is the coordinated launch across ChatGPT, Claude, Cursor, the MCP Registry, and community indexes.
Directory coverage for brandsAI agent verification middleware for MCP servers and HTTPS APIs. Inverse CAPTCHA: admits LLMs, rejects humans and scripts. Open source, MIT.
Use the MCP endpoint listed on this page in your MCP client configuration. One-click install pills support Claude, Cursor, VS Code, and other hosts. Copy the remote MCP URL if your client needs a manual entry.
Operate fdkey-demo? Verify ownership to take over this directory entry.
This server appears in the MCPBundles directory. Verify you operate it to take over the listing — name, description, logo, contact email, and skill content. We email a 6-digit code to a maintainer address your server publishes in /.well-known/security.txt or /.well-known/mcpbundles.json. Free, takes about a minute.
MCPBundles probed 7 tools on the live server. The tool list on this page reflects what was discovered at the last refresh — connect your client to see the full set available to your session.
No provider sign-in was required during MCPBundles' probe. Your client may still need MCPBundles credentials depending on how you connect.
MCPBundles is an independent platform built on the open Model Context Protocol standard. Not affiliated with Anthropic PBC or Claude.