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    2,053,304 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 25 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 25 Oct 2026.269,472 projects gradedProjects with a letter from A to F. Counted on 25 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Apprentice's Codex

    Mod

    Adds new spells and magical gear to Iron's Spellbooks.

    B89/ 100
    • OverviewB
    • SecurityPassed
    • PrivacyNone found
    • AIAI-aided code
    • CompatibilityUp to 1.21.1
    • ModpacksIn 105
    • ReleasesLatest 10 Oct

    Download

    apprentice_codex-1.0.0+mc1.21.1.jar

    Released 10 Oct 2026 · 10.7 MB

    Passed: our checks found nothing harmful in this file.

    Download

    Required to run

    • Iron's Spells 'n SpellbooksAMinecraft 1.21.1 · NeoForge (release 1.21.1-3.16.3)
    • Curios APIAMinecraft 1.21.1 · NeoForge (release 9.5.1)
    • GeckolibAMinecraft 1.21.1 · NeoForge (release 4.9.3)
    • Iron's LibCMinecraft 1.21.1 · NeoForge (release 2.2.0)
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    How grades work

    Strengths

    • Security checks passed
    • Regular releases for Minecraft 1.21.1, a version many recently updated mods still support
    • Public source code and issue tracker

    Points lost

    • Releases replaced within 3 days to fix a problem−5 points
    • First release only 9 months ago−2 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      Full points27 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.2 weeks ago (10 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.1.21.1 on NeoForge, 1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 1.21.1. 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 9 of the last 24 months 6 / 6

    • Stability

      5 points lost17 / 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.3 of the 87 modpacks with two or more versions removed it in a later one (3%) 10 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.10 of its 32 releases in 2 years needed a quick fix (31%) See the 10 releases2 / 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 · hexqua/apprentice_codex 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · hexqua/apprentice_codex 3 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.1,240,679 3 / 4

    • Track record

      2 points lost6 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.9 months, 52 releases 6 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files for recent Minecraft versions. See Security
    Total89 / 100

    63.4 of the 71 points that apply = 89 out of 100. The points above are rounded to whole numbers.

    Images

    • SkyEdge + Spellcaster Gun + Robe
    • Items
    • Spell Dispenser
    • Force Field Sample
    • Focus Staffbow
    • Multipurpose Staffrifle
    • Create Supported
    • Elemental Bow
    • Bullet Stream Sample
    • Breaching Enemy Sample
    • Pastel Staff

    About

    Apprentice's Codex is an add-on for Iron's Spells 'n Spellbooks that expands its magic options with roughly 60 side-grade spells, without adding new spell schools or a mandatory progression path. Its spells cover combat, defense and support, exploration, and practical tasks: summon blades and magical firearms, create barriers and traps, heal or restore mana, produce light, find structures or treasure, store pets or items, and cut trees, harvest crops, shape terrain, and collect or process resources. New equipment includes Spellcaster Guns, Swingcast Staves, Offhand Spell Amplifiers, and specialized weapons such as the Smashcast Scepter, Focus Staffbow, Multipurpose Staffrifle, Reflectcast Shield, and Mana Force Blade. The mod also adds grimoires and curios, along with mage robes that trade defense for spell power and utility blocks including the Spellcaster Workbench, Spell Dispenser, and Atelier Station. The Spell Dispenser can cast supported scroll spells using redstone and mana-potion fuel, and can optionally be used with Create contraptions. Datapacks can customize spell profiles and other gameplay data, including which spells work with the dispenser or autocast amulet, what structures the Search Beacon locates, and recipes for processing and crafting. Existing worlds can use the added content without restarting, and newly generated villages may include a new profession villager.

    Written from Modrinth . How we write it

    In-game changes

    Changes the game's code in 10 areas: Inventory and itemsChanges 8 game code files in this area: items, chests and other containers, crafting and enchanting., Rendering and graphicsChanges 8 game code files in this area: drawing mobs, items, particles and textures on screen., PlayerChanges 3 game code files in this area: your character: movement, abilities, hunger and controls., Mobs and their behaviorChanges 3 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., Game optionsChanges 2 game code files in this area: settings, key bindings and the option screens., Networking and multiplayerChanges 2 game code files in this area: connections, the server list and what is sent between your game and a server., Game data and resourcesChanges 2 game code files in this area: recipes, tags, advancements, language files and other game data., User interfaceChanges 1 game code file in this area: menus, screens, tooltips, the chat window and the in-game overlay., Blocks and fluidsChanges 1 game code file in this area: how blocks, fluids and redstone work. and Game coreChanges 1 game code file in this area: the main loop, lighting and other code the whole game uses..

    Adds 19 blocks, 156 items, 77 entities, 17 enchantments, 251 recipes, 65 advancements, 17 loot tables, 112 sounds and 1 key binding.

    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 30
    Iron's Spells 'n SpellbooksAL_Ender's CataclysmBMowzie's MobsBAttributeFixAMmmMmmMmmMmmA

    Details

    Creator
    Aquid
    License
    MIT License
    Downloads
    1.2M
    Created
    1 Feb 2026
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues , Wiki

    Security

    No harmful code found

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

    What it can do on your computer

    Creates settings files
    The mod keeps its settings in the config folder of your game, where you can change or delete them.
    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. Only in its files for Forge 1.20.1. See Privacy

    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 · Both latest files checked, last on 16 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.
      2 latest files: the newest file for each Minecraft version and loader. Both are for recent versions. 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.
      Folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.

    Privacy

    We found nothing it sends

    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 · Both files 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 both files, for recent Minecraft versions. 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

    AI was used for its code

    Codex is named in the files of its repository.

    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 · 7 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.
      A Codex file .codexPossible signThe tool was seen around the project. This does not show that it was used to make the files you download.: A AI instructions file (AGENTS.md) file AGENTS.md
    • 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
      40 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
      483 images read
    • Sounds in its filesThe tags of the sound files in the files you download, where some AI music tools write their name.
      Nothing found
      40 of 61 sounds 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
      2,819 code files read

    Compatibility

    See all 52 files
    NeoForge
    Forge
    1.201.2126.126.3

    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.
    Iron's Spells 'n SpellbooksACurios APIAGeckolibAIron's LibC
    OptionalProjects it can work with but does not need. The author lists them.
    PatchouliAJust Enough Items (JEI)ACreateB
    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.It has no file for Minecraft versions newer than 1.21.1. Many recently updated mods still support 1.21.1.

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    30150
    Oct 2024: 0 modpacksNov 2024: 0 modpacksDec 2024: 0 modpacksJan 2025: 0 modpacksFeb 2025: 0 modpacksMar 2025: 0 modpacksApr 2025: 0 modpacksMay 2025: 0 modpacksJun 2025: 0 modpacksJul 2025: 0 modpacksAug 2025: 0 modpacksSep 2025: 0 modpacksOct 2025: 0 modpacksNov 2025: 0 modpacksDec 2025: 0 modpacksJan 2026: 0 modpacksFeb 2026: 7 modpacksMar 2026: 16 modpacksApr 2026: 13 modpacksMay 2026: 12 modpacksJun 2026: 20 modpacksJul 2026: 23 modpacksAug 2026: 24 modpacksSep 2026: 27 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20240
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    Mar 202616
    Apr 202613
    May 202612
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    Sep 202627

    More modpacks put it in their new versions than a year ago: 20 a month now, 0 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..

    105 modpacks include Apprentice's Codex in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    SUPERIOR - RPG513K downloadslast version with it 30 Jun 2026FTB Skies 2 Aero248K downloadslast version with it 22 Oct 2026Mystic's Monstrosity - Greedy Edition30K downloadslast version with it 18 Oct 2026Do I am cake?19K downloadslast version with it 6 Sep 2026Neuroshroud: The Abandoned17K downloadslast version with it 10 Jun 2026Rogue! Mayhem12K downloadslast version with it 26 Aug 2026Realm of the Titans11K downloadslast version with it 6 Oct 2026Iron's Extra Spells 'n Spellbooks6.6K downloadslast version with it 7 Jun 2026Mystic's Monstrosity - Avaricious Edition3.1K downloadslast version with it 1 Oct 2026Jelly&Co2.8K downloadslast version with it 6 Sep 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with Apprentice's Codex. Share: how many of the modpacks with Apprentice's Codex also have that mod.

    ProjectTypeShareGrade
    Iron's Spells 'n SpellbooksAModin 98% of the modpacks with Apprentice's CodexL_Ender's CataclysmBModin 92% of the modpacks with Apprentice's CodexMowzie's MobsBModin 72% of the modpacks with Apprentice's CodexAttributeFixAModin 72% of the modpacks with Apprentice's CodexMmmMmmMmmMmmAModin 65% of the modpacks with Apprentice's CodexHazen 'n StuffBModin 61% of the modpacks with Apprentice's CodexRelicsAModin 61% of the modpacks with Apprentice's CodexDeeper and DarkerAModin 61% of the modpacks with Apprentice's CodexAlex's CavesCModin 59% of the modpacks with Apprentice's CodexAmendmentsAModin 59% of the modpacks with Apprentice's Codex
    1 to 10 of 30123

    Latest files

    The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.

    MinecraftLoaderVersionSecuritySendsRequires
    1.21.1·NeoForge1.0.01.0.0 · apprentice_codex-1.0.0+mc1.21.1.jarSends: None foundRequires:Iron's Spells 'n Spellbooks, Curios API, Geckolib, Iron's LibIron's Spells 'n Spellbooks, Curios API, Geckolib, Iron's LibPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.0.01.0.0 · apprentice_codex-1.0.0+mc1.20.1.jarSends: None foundRequires:Geckolib, Iron's Spells 'n Spellbooks, Curios API, Iron's LibGeckolib, Iron's Spells 'n Spellbooks, Curios API, Iron's LibPassedOur checks found nothing harmful in this file. Its code was read too.

    52 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.0.01.0.0 · apprentice_codex-1.0.0+mc1.21.1.jar (main file)·10 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 10.7 MB
    1.20.1The latest file for its Minecraft version and loader·Forge1.0.01.0.0 · apprentice_codex-1.0.0+mc1.20.1.jar (main file)·10 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 11.2 MB
    1.20.1·Forge0.9.8.20.9.8.2 · apprentice_codex-0.9.8.2+mc1.20.1.jar (main file)Beta·28 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 10.4 MB
    1.20.1·Forge0.9.8.10.9.8.1 · apprentice_codex-0.9.8.1+mc1.20.1.jar (main file)Beta·27 Sep 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 10.4 MB
    1.21.1·NeoForge0.9.8.10.9.8.1 · apprentice_codex-0.9.8.1+mc1.21.1.jar (main file)Beta·27 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 10.6 MB
    1.21.1·NeoForge0.9.7.10.9.7.1 · apprentice_codex-0.9.7.1+mc1.21.1.jar (main file)Beta·30 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.5 MB
    1.20.1·Forge0.9.7.10.9.7.1 · apprentice_codex-0.9.7.1+mc1.20.1.jar (main file)Beta·30 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.4 MB
    1.21.1·NeoForge0.9.70.9.7 · apprentice_codex-0.9.7+mc1.21.1.jar (main file)Beta·24 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.3 MB
    1.20.1·Forge0.9.70.9.7 · apprentice_codex-0.9.7+mc1.20.1.jar (main file)Beta·24 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 9.2 MB
    1.20.1·Forge0.9.60.9.6 · apprentice_codex-0.9.6+mc1.20.1.jar (main file)Beta·26 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 8.4 MB
    1.21.1·NeoForge0.9.60.9.6 · apprentice_codex-0.9.6+mc1.21.1.jar (main file)Beta·26 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 8.4 MB
    1.20.1·Forge0.9.50.9.5 · apprentice_codex-0.9.5+mc1.20.1.jar (main file)Beta·4 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 7.7 MB
    1.21.1·NeoForge0.9.50.9.5 · apprentice_codex-0.9.5+mc1.21.1.jar (main file)Beta·4 Jul 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 7.7 MB
    1.21.1·NeoForge0.9.4.20.9.4.2 · apprentice_codex-0.9.4.2+mc1.21.1.jar (main file)Beta·16 Jun 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 7.2 MB
    1.21.1·NeoForge0.9.4.10.9.4.1 · apprentice_codex-0.9.4.1+mc1.21.1.jar (main file)Beta·15 Jun 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 7.2 MB
    1.20.1·Forge0.9.4.10.9.4.1 · apprentice_codex-0.9.4.1+mc1.20.1.jar (main file)Beta·15 Jun 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 7.2 MB
    1.21.1·NeoForge0.9.40.9.4 · apprentice_codex-0.9.4+mc1.21.1.jar (main file)Beta·14 Jun 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 7.2 MB
    1.20.1·Forge0.9.40.9.4 · apprentice_codex-0.9.4+mc1.20.1.jar (main file)Beta·14 Jun 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 7.2 MB
    1.20.1·Forge0.9.30.9.3 · apprentice_codex-0.9.3+mc1.20.1.jar (main file)Beta·24 May 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 6.2 MB
    1.21.1·NeoForge0.9.30.9.3 · apprentice_codex-0.9.3+mc1.21.1.jar (main file)Beta·24 May 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 6.2 MB
    1 to 20 of 52123

    Quick fixes

    In the last 2 years, 10 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 5 points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.10

    • apprentice_codex-0.9.8.2+mc1.20.1.jar28 Sep 2026Hotfix (1.20.1 only) Fixed a crash that could…
    • apprentice_codex-0.9.4.2+mc1.21.1.jar16 Jun 2026Hotfix Fixed a startup crash with the latest Epic…
    • apprentice_codex-0.9.4.1+mc1.20.1.jar15 Jun 2026Hotfix Fixed a crash that occurred when inscribing…
    • apprentice_codex-0.9.1+mc1.21.1.jar9 May 2026…(Thanks: LongFei32) Bug Fixes Fixed a compatibility issue with mods that…
    • apprentice_codex-0.7.2.3+mc1.21.1.jar25 Mar 2026…} ] } Bug fixes Fixed a bug where School Affinity Potion…
    • apprentice_codex-0.7.2.2+mc1.21.1.jar24 Mar 2026…16 and priority setting) Bug fixes "Amulet of Absorption Amplify…
    • apprentice_codex-0.7.2.1+mc1.21.1.jar23 Mar 2026hotfix Fixed this mod break ALL…
    • apprentice_codex-0.7.1.2+mc1.20.1.jar13 Mar 2026HOTFIX fix crash when EpicFight installed…
    • apprenticecodex-0.3.1.jar7 Feb 2026fix crash server.
    • apprenticecodex-0.2.0.jar2 Feb 2026…spell that light weight firearm spell. Fix Archer Option death message id issue.