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

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.

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

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.

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.

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

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.

An MCP server that gives AI assistants direct access to the FEMA National Flood Hazard Layer (NFHL) for flood zone lookups, FIRM panel information, and flood map data in the United States.

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.

MCP server that provides access to the Kenall postal code API for Japanese address lookups, enabling lookup by postal code and search by address.

Enables Claude Desktop to query real-time weather information, forecasts, and history via the OpenWeatherMap API.

MCP server for the Philippine Standard Geographic Code (PSGC) API. Gives AI agents structured access to the full PH geographic hierarchy - regions, provinces, cities, municipalities, and barangays.

Provides real-time weather data, forecasts, alerts, and location comparisons via the OpenWeatherMap API.