Atmospheric API
Atmospheric API is a Fabric library that other mods can use for shader effects, overlay rendering, custom spyglasses and related helpers.
What it does
The library collects utilities that mod developers can call from their own code. It covers post-effect shader application, overlay rendering, directional particles, scrolling text gradients and resource loading, with usage examples included for the less obvious parts. Codec helpers for PacketCodec and StreamCodec, multiversion helpers and a block registry are also part of the package.
Players do not play the library directly, but it adds content through the mods that rely on it, such as custom spyglasses, two-handed items and non-living entities with attributes. Damage type tags are provided so that they can bypass creative spectator invulnerability. A datapack datagen feature and a way to list resource packs and configs round out the set.
Installation needs Fabric API. Atmospheric API runs on client and server, so both the server and every player need it. Files are published for Fabric only, for four game versions: 1.21.1, 1.21.8, 1.21.10 and 26.1.2. The license is custom and the code is not open source, but public links to the source code and issue tracker exist.
Key features
Post-effect shaders
Helpers apply post-processing shaders to the screen, letting other mods add visual effects with a few calls.
Overlay rendering
A rendering helper draws overlays on top of the game view for effects and interface elements.
Custom spyglasses
Spyglass variants can be added by other mods, built on the library's item helpers.
Directional particles
Particles can be emitted with a direction, which suits effects such as sparks or wind.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Use cases
Mod development
Developers who build client effects can reuse shader, overlay and particle helpers instead of writing their own.
Datapack authors
Datagen support and resource loading helpers serve authors who generate data or ship resource packs.
Who it’s for: Mod developers building on Fabric who want shader, rendering and codec helpers without writing them from scratch. Players mainly meet the library through the mods that depend on it.
Questions
Does Atmospheric API need Fabric API?
Does Atmospheric API have to be installed on both sides?
Which game versions have Atmospheric API files?
In the catalog
Atmospheric API is one of 3,514 Library mods on ModsFinder, and one of 2,348 Library mods for Fabric. 15,189 mods support Minecraft 26.1.2.
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What the author says
Usage examples include: - Post-effect shader application - Overlay rendering - Custom spyglasses - Damage type tags to bypass creative and spectator invulnerability - Datapack datagen - Easy resource loading - Directional particles - Lists of resource packs as configs - Two-handed items - Non-living entities with…
Official listing
- Modrinth page
- modrinth.com/mod/atmospheric_api
- Owner
- SkyNotTheLimit
- Published
- 2025-04-06
- Updated on Modrinth
- 2026-08-22
- Facts verified
- 2026-10-15