ragassets-gateway — renders and serves Ragnarok Online sprites, icons, maps, and BGM.

Try: /image?job=1002            (still image)
     /image?job=1002&action=0   (animation, APNG)
     /gif?job=1002&action=0     (same, as an animated GIF)
     /icons/item/501.png        (static item/collection/skill/job/ui images)
     /effects/index.json        (effect-only costume catalogue)
     /effects/c_spot_light/effect.json   (one effect's .str animation + textures)
     /effects/sprites/torch_01/sprite.json  (one sprite map-effect's per-frame img/delay/offset)
     /effect/str?file=stormgust  (a skill effect's parsed .str keyframe animation, as JSON)
     /effect/texture?file=stormgust/storm_ball  (one .str layer texture, colorkeyed PNG)
     /effect/sound?file=effect/ef_portal  (one sound effect, browser-playable WAV)
     /effect/sound/index.json   (names present in the extracted sound tree)
     /effect/skill-map          (skillId → effectId(s) lookup, ported from roBrowser)
     /effect/table              (effectId → effect parts lookup, ported from roBrowser)
     /maps/index.json           (world-map catalogue for the map simulator)
     /maps/prontera/manifest.json  (one map's geometry + shared asset manifest)
     /bgm/index.json            (per-map background-music catalogue)
     /bgm/210.mp3               (one background-music track)

See the README for every supported parameter.