"Free APIs and services without commercial fees" matching MCP servers:

MCP server exposing all major Swiss official public APIs as native tools for any MCP-compatible AI agent.

Enables location-based services such as geocoding, reverse geocoding, finding nearby places, directions, elevation, and basemap tiles using ArcGIS Location Services.

This MCP server provides accessibility risk assessment for Seoul subway trips, considering wheelchair, stroller, and other mobility constraints. It offers tools to check station facilities, elevator status, and calculates risk scores for routes based on a deterministic engine.

Enables real-time one-way and round-trip flight searches from any MCP client without an API key or account, returning live fares, historical price insights, and bookable links supported by disclosed sponsored cards.

Official bounded, read-only access to live community-powered aircraft positions and aggregate ADSBiq network statistics.

The world railway atlas as read-only MCP tools: search 744+ legendary train routes (high-speed, classic, night, scenic) and get per-route facts, rankings and journey times. Runs from the repo's open dataset (CC BY 4.0); a free hosted endpoint is also live at https://trainrouter.com/mcp.

Google Hotels MCP server via direct RPC — no scraping, no browser automation. Three tools: hotel list search (16 filter slots: stars, price, amenities, brands, free cancellation), per-OTA rate plans and cancellation policies for a single hotel, and parallel top-N enrichment. One-command setup for Claude Code, Codex, and ChatGPT

Free, no-login MCP server for searching and comparing flights with real-time pricing from multiple airlines and booking platforms worldwide.

Multi-carrier parcel tracking server that communicates directly with carrier APIs (DHL, UPS, FedEx, etc.) without third-party aggregators, providing normalized tracking status and events.

Enables AI assistants to access Google Maps services including places search, details, directions, geocoding, and nearby search through natural language.

Enables AI assistants to connect to the AwardMath travel points optimizer, turning wallet balances and travel goals into up to three verified, explainable award-booking plans with exact transfer steps, required points, and fees.

Provides real-time Seoul city data including population congestion, traffic, parking, transit, bikes, EV chargers, weather, events, commercial, accidents, alerts, and news across 121 locations using Seoul Open Data API.

An MCP server for live flight tracking and real-time status checks, including airport and airline code resolution, powered by the free AviationStack API.

Free, no-login MCP server for discovering and comparing rental cars with real-time pricing from multiple providers worldwide.

Enables MCP clients to search stays by destination and dates with rich filters and read full property details as structured JSON, without needing a Booking.com account or self-hosting.

Provides flight search and details for Spanish AENA airports, combining public and authenticated APIs into one interface.

MCP server for the Viator Partner API that enables searching tours, activities, and attractions with structured filters or free text, retrieving product details and availability schedules.

An MCP server for Swiss Federal Railways (SBB) open data, enabling AI models to query real-time disruptions, passenger frequencies, station details, and more without an API key.

Check visa requirements for 39,585 passport-destination pairs in 15 languages. Returns visa type, required documents, application process, and travel tips from 136 official government sources. Free quick checks without API key.

Provides access to Google Maps Platform APIs for places search, geocoding, turn-by-turn directions, route matrices, elevation, and time zones. Enables natural language queries for location-based information and routing.