"Capture The Flag (CTF) cybersecurity competitions and challenges" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
The OpenRouter MCP server plugs OpenRouter into the AI tools you already use. Once connected, your assistant can pull live OpenRouter data (models, prices, your credits, rankings, and docs) and send quick test messages, all without leaving your editor.
Scan and fix email auth (SPF, DMARC, DKIM, MX, blacklists, expiry) + DNS checks. Validated fixes.
Federated search of books and papers, BibTeX/RIS citations, open-access retrieval and reading.
IBGE: geography, census, economy and health from the official APIs, with provenance. 21 tools.
Entity resolution — data mapping, SDK code generation, docs search, and error troubleshooting
Check internet providers, plans, speeds, and known pricing at a specific U.S. street address.
The vetted, cross-LLM marketplace of doer agents — itself an MCP server.
Helena Bioinformatics MCP for clinical variant interpretation, ACMG/AMP evidence and literature.
Live power, energy, grid, gas, fiber & data-center site-selection infrastructure — query and cite.
Search domain availability and pricing, straight from chat, then open a link to register.
Free: turn your AI chats into spaced-repetition vocabulary. 13 tools, reads and writes.
Free, open MCP server for The Urantia Papers. 197 papers, 14,500+ paragraphs, 4,400+ entities.
Accessibility and WCAG data for your own websites: fix lists, live checks, and fix validation.
Money, FX, capital-market and metadata-only China macro evidence with source clocks and limits.
Live USPS, UPS and FedEx shipping rates for a US parcel described in plain words. No scale needed.
Rights-aware censorship, China-economic status, and tamper-evident AI evaluation tools.
Independent pre-transaction audit for construction estimates. Free, and every verdict recomputes.
Zero-auth MCP server for sending a reminder to anyone with a public UnRemind.me page. No account or token. The recipient approves it before it enters their list.
Agent-first field workforce scheduling. Your agent schedules crews, verifies GPS punches, collects forms, and exports timesheets. No dashboard. Keys zsc_. $5 activation credited. Worker invite $0.25. No seats. Docs: https://www.zensched.com/docs/quickstart/ Pricing: https://www.zensched.com/pricing/ Android: https://play.google.com/store/apps/details?id=com.zensched.app iOS TestFlight beta: https://testflight.apple.com/join/Wp51m5Yq
111A complete color workflow over MCP: mix, convert, harmonize, measure, and remember palettes.
