faces.putbit.dev — data for the putbit Pebble watchfaces.

  /v1/clouds      the globe's cloud layer, JSON
  /v1/clouds.bin  the same grid, raw
  /v1/clouds.png  as a picture

Sources: NOAA/NESDIS Global Mosaic of Geostationary Satellite Imagery, via nowCOAST;
the poles from Open-Meteo (https://open-meteo.com), CC BY 4.0.