"National Rail" matching MCP connectors:

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

Plan US National Park Service trips — parks, alerts, campgrounds, things to do, events.

iRail MCP — Belgian rail (SNCB/NMBS) real-time via the community iRail API

Travel-upgrade Q&A, live booking eligibility, and operator lookups for airline, cruise, rail.

Washington Metro real-time + static rail/bus data. Free key required.

Corporate travel: search and book flights, hotels, rail and transfers, manage orders.