"Free PostgreSQL Database Solutions" matching MCP connectors:

Free walking tours & activities in 1,000+ cities — live availability, ratings & booking links.

Real-time fuel prices, active alerts (traffic, wildfires, severe weather, earthquakes), per-country data coverage, and cheapest gas stations by city, aggregated from official public sources across 38+ countries. Read-only, no auth required for the free tier.

IMF PortWatch MCP — global maritime trade & chokepoint signals (free, no auth)

OpenSky MCP — OpenSky Network API (free, no auth for anonymous access)

Citybikes MCP — wraps CityBik.es API (free, no auth required)

Swiss Transport MCP — wraps Transport Open Data API (free, no auth)

FAA Delays MCP — live US airport operational status (FAA, free, no auth).

Open Charge Map MCP — global EV charging station database (openchargemap.io).

Airports MCP — wraps AirportGap API (free, no auth required)

The best agent monetization tool: free search, clear rev-share, 10M+ commerce/travel/local offers.

Audio-guide and trip-planning tools for 1,100+ cities from Audiala. Free, no API key.

NPS MCP — US National Park Service (free key, generous limits)

Search Australian campsites, caravan parks and free camps; weather, gear, road trips and booking.

Europe's 478 best beaches: sea temperature, sand, best months, swimming, surf. Free, CC BY 4.0.

BPC Sustainable Carrier Agents - Low Token Zero Inference

Free, no-login rental car search with real-time pricing.

Free, no-login flight search with real-time pricing from multiple airlines.

Structured data on wheelchair-accessible & public toilets across Japan for AI agents and travel/accessibility apps. 526 Tokyo stations (each mapped to its nearest station exit) + 612 municipalities. Station names accept Japanese or romaji. Free tier with API key.

Search & add local tours and experiences (Italy/EU). Operators: first 100 bookings free, then 5%.

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