"Free tools or resources that do not require an API" matching MCP connectors:
Matching Connector Tools:
APILayer MCP Adapter turns APILayer's REST APIs into Model Context Protocol tools so any MCP-compatible client can call them directly in conversation. The first release ships ipstack IP geolocation and security lookups (single IP, caller's IP, and bulk). Additional APILayer services are added by registering them in a single config file, so the catalog grows without client-side changes.
AI-readable directory + commerce layer: 3,500+ SEA businesses, plus products from verified stores.
City geocoding and timezone resolution for birth data, for AI agents, one API key.
US crime scores, incidents, neighborhood demographics, rent data, and offender search by address.
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.
Lviv public transport MCP: stops, timetables, routes, and live vehicle positions. No API key.
Portugal real estate search — 224,000+ listings, commute times and market prices
Swiss weather data for AI assistants — forecasts, measurements, stations, pollen.
AI access to Mapbox docs, API references, style specs, and guides. No token required.
Search local businesses and book, order, quote or message any of them from one connection.
Live ships at 8 US gateways + Census port trade by country & commodity. Free, no API key.
US property risk data for agents: flood, hazards, taxes, air quality. Credits or USDC.
Walk Score MCP — wraps the Walk Score API (walkscore.com)
Tomorrow.io MCP — wraps the Tomorrow.io Weather API (api.tomorrow.io/v4)
OpenWeather MCP — wraps the OpenWeatherMap API (openweathermap.org)
iRail MCP — Belgian rail (SNCB/NMBS) real-time via the community iRail API
Citybikes MCP — wraps CityBik.es API (free, no auth required)
The world railway atlas as MCP tools: 744+ legendary train routes, night trains, journey times.