"Capture The Flag (CTF) cybersecurity competitions and challenges" matching MCP servers:

An MCP server that lets users find nearby shops and POIs around a location and find targets such as gas stations or charging points within a given radius along a driving route, using the Amap (Gaode) Web Service API with built-in API key entry and validation.

Enables AI assistants to search checked US roofing, siding, and gutter contractors by city and trade, and to retrieve individual contractor profiles with contact details, claimed status, and ratings. Read-only, requires no login or API key, and filters out closed or unlisted businesses.

A local MCP server that integrates FastMCP with OpenAI to enable natural language queries for current weather, forecasts, and currency conversion using ExchangeRate-API and Open-Meteo.

Enables searching student events, ticket prices, city guides and student deals across 85+ cities, plus consent-based actions to message the team or join a Halloween waitlist.

A self-contained MCP server that gives AI agents the ability to calculate high-precision astronomical data. It provides tropical zodiac coordinates, planetary speeds, retrograde detection, and house cusps using the trusted Swiss Ephemeris engine. 100%

Enables read-only lookups of state septic licensing agencies with their official verification URLs, searches of license-matched septic contractors by state, city, county, zip or service, and retrieval of sourced septic cost guides. Every response carries a thesepticguide.com source link, requires no API key, and reports its snapshot date.

Enables discovery and querying of UK public data for infrastructure, geology, and preliminary ground investigations, including boreholes, environmental monitoring, planning, mapping, and traffic, plus cited desk studies and ground-investigation gap planning.

MCP server that resolves postal/ZIP codes to place names, states, and coordinates using Zippopotam.us. Free, no API key required.

Provides real-time air quality data (US AQI, PM2.5, PM10, ozone, NO2, SO2, CO) for any city via natural language, using free Open-Meteo data and a single tool.

Enables users to check Google organic, map pack, and local finder positions for keywords across specified locations, returning per keyword/location rows with ratings, competitors, and rank changes. It runs searches from each location via Apify and can track history with a state key.

Enables AI assistants to validate and standardize US addresses using the official USPS Address Validation API with secure OAuth2 authentication.

Lets agents query anchored ground-level capture data, verify provenance, and commission new captures, paying per request in USDC on Base or Arc via x402.

Gives AI assistants read-only, key-free access to Sentinel-2 NDVI time series, ESA WorldCover land-cover shares, and Copernicus 30 m elevation and slope for a point or small area, returning the scene IDs, units, and caveats behind every number. Built-in sanity checks and a verify tool recompute key values through an independent path so the assistant can flag cloudy, low-confidence, or mismatched results instead of guessing.

The Stadia Maps MCP server provides AI assistants with access to Stadia Maps APIs for location services, geocoding, routing, and mapping capabilities.

Provides weather information for the United States through the Model Context Protocol. Enables users to query current weather conditions and forecasts for US locations.

Provides forward and reverse geocoding using the OpenCage API, enabling conversion between addresses and geographic coordinates.

Enables AI agents to interact with the Planet API for satellite imagery ordering, subscriptions, and data management through natural language.

UK address (Royal Mail PAF), email, and phone (live HLR carrier) validation via the Postio API. Six tools: address search, postcode lookup, UDPRN, email validate, phone validate, and a health probe.

Provides custom tools to the Gemini model for spatially grounding responses using Google Maps Platform APIs (Places, Routes, Elevation).

Enables MCP clients, the command line, and Python to find restaurants and check read-only table availability across SevenRooms, TableCheck, ResDiary, and other booking systems. It returns provider booking links and prefilled pages without booking, holding, or cancelling tables.

Enables to interact with comprehensive weather data through the MCP protocol, including current conditions, multi-day forecasts, hourly forecasts, and geocoding.

Enables real-time Amtrak train tracking and information via the community Amtraker API.

Adapts the HeFeng QWeather MCP server for ModelScope cloud hosting, allowing weather queries through stdio or HTTP with a default stdio entry.

Enables web and local search capabilities using the Brave Search API, allowing users to perform general web searches and find local businesses with ratings, hours, and contact info.

Enables an AI agent to scout local businesses, instantly re-rank cached leads under new scoring weights, explain each score variable by variable, run one-off website audits, and generate ready-to-send outreach pitches or WhatsApp openers from natural language. It exposes the same discovery/scoring engine as the CLI, so results can be listed, scored and opened in a dashboard without leaving the chat.

Enables users to search for geographic locations and visualize them on an interactive 3D globe powered by CesiumJS and OpenStreetMap. It provides tools for geocoding addresses and rendering maps with specific bounding boxes through the Model Context Protocol.

MCP server for querying Brazilian postal codes (CEP) from the official Correios source, supporting read-only lookups via natural language in any MCP-compatible client.

Enables Claude to fetch real-time weather data for any city using the OpenWeatherMap API.

Provides tools to search and query open geospatial datasets from the City of Roanoke, VA, including parcels, zoning, and public works, via ArcGIS Feature Services.

An MCP server for searching Sparkasse bank branches and ATMs by location, with filtering by type, facilities, and open status. Currently uses mock data but designed for easy integration with the real Sparkasse API.