MAPC2MAPC Help pages : Web Map Servers
How to ....
Grids and Datums
Map Images
System Issues

From version 518, MAPC2MAPC will access some Web Map Servers (WMS). There is a description of WMS at (although not all of the links still work).

MAPC2MAPC can use WMS as a map source (File>Build map from map source) provided that the server supports Web Mercator (EPSG:4326) - most do.

Having found the URL to retrieve a tile, configure this as a map source :
  Replace the EPSG code by 4236
  Make sure WIDTH and HEIGHT are both 256
  Replace the bounding box (BBOX) parameters with {b}  (eg ....&BBOX={b}&WIDTH=256....)

As an example, here is the code for IDEE Spain :