These docs apply to Minecraft Transit Railway 4.0.0 and above.
Each endpoint's schema is linked in their own page. See the Transport Simulation Core project for all schemas.
localhost with port 8888.?dimension=<dimensionId> at the end of the endpoint URL (e.g. 0 for overworld, 1 for nether).<x1>-<y1>-<z1>-<x2>-<y2>-<z2>.