The Static API allows for 4 different types of overlays: GeoJSON styled with the simplestyle-spec, Maki marker, custom marker, or an encoded polyline. A single request can have a combination of overlay types and allows up to 100 features.
Since this is Mapbox GL under the hood, it’s possible to change where the overlay ends up in the style’s layer hierarchy. By specifying the query parameter before_layer, the overlays will be inserted before the specified layer in the style. This is great for putting data under labels.
Choropleth map with polygons underneath the labels on. View request.
Show a user their morning commute with live traffic.