Endpoints:
/api/generate?token=1 — PNG image (stats view)/api/generate?token=1&variant=alt — PNG image (profile view)/api/generate?token=1&size=512 — Resized PNG/api/generate?token=1&metadata=true — JSON metadata/api/metadata?token=1 — JSON metadata/api/generate?layer_type=Fur&layer_value=Pink — Individual layer PNG