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    2,046,932 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 24 Oct 2026.636,163 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 24 Oct 2026.269,480 projects gradedProjects with a letter from A to F. Counted on 24 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Nether API

    Mod

    A library mod for adding End and Nether biomes or structures, and for creating new biome ambience!

    B85/ 100
    • OverviewB
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityMinecraft 1.12.2
    • ModpacksIn 99
    • ReleasesLatest 20 Oct

    Download

    Nether-API-v1.5.4-mc1.12.2.jar

    Released 20 Oct 2026 · 545.0 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    How grades work

    Strengths

    • Security checks passed
    • Public source code and issue tracker
    • Widely used
    • Around for years

    Points lost

    • Releases replaced within 3 days to fix a problem−7 points
    • Releases in only 4 of the last 24 months−3 points
    All 11 criteria

    • Maintenance

      3 points lost24 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4 days ago (20 Oct 2026) 12 / 12
      Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.12.2 on Forge. A version many modpacks still use. Latest Minecraft: 26.3. 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 4 of the last 24 months 3 / 6

    • Stability

      7 points lost15 / 22
      Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.5 of the 77 modpacks with two or more versions removed it in a later one (6%) 10 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.5 of its 11 releases in 2 years needed a quick fix (45%) See the 5 releases0 / 7
      Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5

    • Transparency

      Full points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · jbredwards/Nether-API 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · jbredwards/Nether-API 3 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.673,636 4 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.3.3 years, 16 releases 8 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file. See Security
    Total85 / 100

    60.5 of the 71 points that apply = 85 out of 100. The points above are rounded to whole numbers.

    Images

    • BetterNether + Journey Into The Light + Nethercraft
    • Patched Nether Caves
    • 256 Block Tall Nether
    • Stygian End
    • Arctic Abyss With Customized Fog
    • Ruthless Sands With Customized Fog
    • BetterNether Using Real Biomes
    • Journey Into The Light using real biomes
    • Nether Biomes Working Together
    • Connected Cave Near Village
    • Corrupted Sands Cave

    About

    Nether API is a library mod that gives developers a shared system for adding End and Nether biomes and structures, while helping biome-generation mods work together instead of relying on separate generation systems. Custom biomes can define generation weights, fog colors, music, surface builders, chunk populators, cave-carving rules, and weighted sub-biomes or edge-biomes; End biomes can also set conditions for Chorus Plants, End Cities, and Small End Islands. The API also lets creators add biome ambience to any biome, including passive or mood sounds, ambient particles, custom lava colors, and End or Nether fog colors. Custom structures can generate across chunk boundaries, set their own spawning and generation conditions, appear in the /locate command, and avoid intersecting other structures. For players, the mod improves End and Nether world generation: caves can carve through Nether biome surface blocks and soul sand, caves can appear in the End’s outer islands, and an optional setting raises Nether height to 256 blocks. It also supports cross-mod Nether generation, including real biome generation for BetterNether and Journey Into The Light, and compatibility with Biomes O’ Plenty, Natura, Nethercraft Classic, and NetherEx. Additional fixes cover dimension spawn and respawn behavior, including support for per-dimension bed spawn points, and help modded End and Nether plants grow on compatible End Stone-like, Netherrack-like, and Soul Sand-like soils.

    Written from Modrinth , CurseForge and the GitHub README . How we write it

    In-game changes

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2.

    Adds 3 blocks: Rooty End Stone, Rooty Netherrack and Rooty Soul Sand.

    Counted from the names and data files in the mod, so the list may not be complete.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Often used with it

    See all 29
    YUNG's Better CavesAChiselCVintageFixAFoamFixCUniversal TweaksA

    Details

    Creator
    jbredwards
    License
    Custom License
    Downloads
    674K
    Created
    25 Jun 2023
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues

    Security

    No harmful code found

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2.

    We checked its files and read their code, without running it.

    Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.

    How we checked · The latest file checked, last on 20 Oct 2026
    • FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.
      1 latest file. It is not for a recent Minecraft version, so the answer above is about it. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
    • Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.
      Read without running it
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.
      Nothing declared about your system outside the game.
    • Looked for, not foundWe looked for these in the file and did not find them.
      The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends

    It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2.

    We read its code without running it: it contacts no web address while you play.

    Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.

    How we checked · Its one file read
    • Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.
      The code of its one file, for Minecraft 1.12.2. See each file in Releases
    • Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.
      Nothing declared about crash reports, usage data or advertisements.

    AI

    No sign that AI was used to make it

    We looked for AI tools in its texts, files, images and code history and found none.

    No sign of AI in the game

    We found no AI service, AI library or AI model file in its code.

    Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.

    How we checked · 6 places read
    • Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.
      No AI content or AI features declared.
    • Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.
      Nothing found
    • Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.
      Nothing found
      22 of 27 changelogs read
    • Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.
      Nothing found
    • Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.
      Nothing found
      1 image read
    • Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.
      No AI service, AI library or AI model file
      294 code files read

    Compatibility

    See all 16 files
    Forge
    1.121.151.171.2026.1

    Point at or tap a version to see its loaders.

    Runs onWhere to install it: in your game, on the server, or both. As the author says on Modrinth.Needed in your game and on the server, or you cannot join.
    RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.Nothing
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    IncludesProjects packed inside its files.Nothing
    Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.No file yet for any of the last 6 Minecraft versions.

    Related projects

    Projects that need Nether API to work.

    ProjectTypeDownloadsGrade
    End Expansion - The Lamented IslandsBMod329K downloadsUnseen's Nether BackportAMod74K downloads

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    20100
    Oct 2024: 0 modpacksNov 2024: 1 modpackDec 2024: 0 modpacksJan 2025: 0 modpacksFeb 2025: 0 modpacksMar 2025: 1 modpackApr 2025: 1 modpackMay 2025: 0 modpacksJun 2025: 0 modpacksJul 2025: 2 modpacksAug 2025: 2 modpacksSep 2025: 0 modpacksOct 2025: 3 modpacksNov 2025: 8 modpacksDec 2025: 8 modpacksJan 2026: 14 modpacksFeb 2026: 19 modpacksMar 2026: 13 modpacksApr 2026: 10 modpacksMay 2026: 19 modpacksJun 2026: 20 modpacksJul 2026: 12 modpacksAug 2026: 14 modpacksSep 2026: 14 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20240
    Nov 20241
    Dec 20240
    Jan 20250
    Feb 20250
    Mar 20251
    Apr 20251
    May 20250
    Jun 20250
    Jul 20252
    Aug 20252
    Sep 20250
    Oct 20253
    Nov 20258
    Dec 20258
    Jan 202614
    Feb 202619
    Mar 202613
    Apr 202610
    May 202619
    Jun 202620
    Jul 202612
    Aug 202614
    Sep 202614

    More modpacks put it in their new versions than a year ago: 15 a month now, 1 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..

    99 modpacks include Nether API in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    Bleach Evolved247K downloadslast version with it 19 Oct 2026NanoMagic130K downloadslast version with it 22 Aug 2026Mercury landing96K downloadslast version with it 1 Dec 2025Rhinocraft62K downloadslast version with it 15 Jun 2026Hunting Monsters The Witcher Modpack55K downloadslast version with it 9 Nov 2025BeanPack: Invincible21K downloadslast version with it 23 Oct 2026Emberfall X Dragonfire X Pickle Dragonfire15K downloadslast version with it 22 Feb 2026Parasitus10K downloadslast version with it 12 Aug 2026Boostify7.1K downloadslast version with it 15 Sep 2024Modernized 1.12: The Golden Era6.4K downloadslast version with it 22 Mar 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with Nether API. Share: how many of the modpacks with Nether API also have that mod.

    ProjectTypeShareGrade
    YUNG's Better CavesAModin 54% of the modpacks with Nether APIChiselCModin 53% of the modpacks with Nether APIVintageFixAModin 48% of the modpacks with Nether APIFoamFixCModin 47% of the modpacks with Nether APIUniversal TweaksAModin 43% of the modpacks with Nether APIFuture MCCModin 43% of the modpacks with Nether APIThe AetherCModin 42% of the modpacks with Nether APIAqua Acrobatics [Forge]DModin 41% of the modpacks with Nether APICoFH WorldDModin 41% of the modpacks with Nether APIMowzie's MobsBModin 41% of the modpacks with Nether API
    1 to 10 of 29123

    Latest files

    The newest file for each Minecraft version and loader. None is for a recent Minecraft version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    Older Minecraft versions
    1.12.2·Forge1.5.41.5.4 · Nether-API-v1.5.4-mc1.12.2.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    16 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.12.2The latest file for its Minecraft version and loader·Forge1.5.41.5.4 · Nether-API-v1.5.4-mc1.12.2.jar (main file, 2 other files in this version not shown)·20 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 545.0 KB
    1.12.2·Forge1.5.31.5.3 · Nether-API-v1.5.3-mc1.12.2.jar (main file, 2 other files in this version not shown)·19 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 536.9 KB
    1.12.2·Forge1.5.21.5.2 · Nether-API-v1.5.2-mc1.12.2.jar (main file, 2 other files in this version not shown)·13 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 536.7 KB
    1.12.2·Forge1.5.11.5.1 · Nether-API-v1.5.1-mc1.12.2.jar (main file, 2 other files in this version not shown)·11 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 536.4 KB
    1.12.2·Forge1.5.01.5.0 · Nether-API-v1.5.0-mc1.12.2.jar (main file, 2 other files in this version not shown)·11 Oct 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 536.4 KB
    1.12.2·Forge1.4.51.4.5 · Nether-API-v1.4.5-mc1.12.2.jar (main file)·5 Jun 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 436.8 KB
    1.12.2·Forge1.4.41.4.4 · Nether-API-v1.4.4-mc1.12.2.jar (main file)·25 May 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 432.7 KB
    1.12.2·Forge1.4.31.4.3 · Nether-API-v1.4.3-mc1.12.2.jar (main file)·25 May 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 432.5 KB
    1.12.2·Forge1.4.21.4.2 · Nether-API-v1.4.2-mc1.12.2.jar (main file)·13 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 409.1 KB
    1.12.2·Forge1.4.11.4.1 · Nether-API-v1.4.1-mc1.12.2.jar (main file)·13 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 408.4 KB
    1.12.2·Forge1.4.01.4.0 · Nether-API-v1.4.0-mc1.12.2.jar (main file)·4 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 408.3 KB
    1.12.2·Forge1.3.01.3.0 · Nether-API-v1.3.0-mc1.12.2.jar (first file)·1 Jan 2024PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 224.7 KB
    1.12.2·Forge1.2.01.2.0 · Nether-API-v1.2.0-mc1.12.2.jar (first file)·16 Jul 2023PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 113.8 KB
    1.12.2·Forge1.1.01.1.0 · Nether-API-v1.1.0-mc1.12.2.jar (first file)·8 Jul 2023PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 111.5 KB
    1.12.2·Forge1.0.11.0.1 · Nether-API-v1.0.1-mc1.12.2.jar (first file)·26 Jun 2023PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 107.4 KB
    1.12.2·Forge1.0.01.0.0 · Nether-API-v1.0.0-mc1.12.2.jar (first file)·25 Jun 2023PassedOur checks found nothing harmful in this file.Open this file on ModrinthNot on CurseForgeDownload · Stable · 107.4 KB

    Quick fixes

    In the last 2 years, 5 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 7 points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.5

    • 1.5.420 Oct 2026Bug Fixes: - BetterNether RotN/Continuation: - Fix crash when…
    • 1.5.213 Oct 2026Bug Fixes: - NetherEx Coolmar Spider rendering bugfix from v1.5.0…
    • 1.5.111 Oct 2026Bug Fixes: - Fix crash while Biomes O' Plenty is not installed…
    • 1.4.425 May 2026…url. Compatibility Fixes and Improvements: - Dynamic Surroundings HUD: - Fix…
    • 1.4.213 Nov 2025Bug Fixes: - Fix critical client-world desync issue (fixes [#27…