"Capture The Flag (CTF) cybersecurity competitions and challenges" matching MCP connectors:
GET /v1/connectors — MCP directory API referenceMatching Connector Tools:
Scan and fix email auth (SPF, DMARC, DKIM, MX, blacklists, expiry) + DNS checks. Validated fixes.
Read-only MCP server for the OrchestKit docs: full-text search + Markdown fetch. No auth.
IBGE: geography, census, economy and health from the official APIs, with provenance. 21 tools.
Look up a guitar chord by name and get a text chord diagram. 12,708 standard-tuning names.
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.
Verified fixes, professional reviews, and evidence-led apparel over MCP.
The vetted, cross-LLM marketplace of doer agents — itself an MCP server.
Helena Bioinformatics MCP for clinical variant interpretation, ACMG/AMP evidence and literature.
The Brain Layer for AI Trading Agents — quant calls + cross-venue arb across perp venues via MCP.
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, open MCP server for The Urantia Papers. 197 papers, 14,500+ paragraphs, 4,400+ entities.
Convert PDF bank statements into structured transactions, accounts, and balances.
Accessibility and WCAG data for your own websites: fix lists, live checks, and fix validation.
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.
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.
