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    2,055,424 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 2026.269,392 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.

    Open Parties and Claims - Essentials

    Mod

    Adds custom commands, party chat, and claim permissions to your game.

    C71/ 100
    • OverviewC
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityMinecraft 1.21.1
    • ModpacksIn 23
    • ReleasesLatest 17 Oct

    Download

    opac_essentials-2.3.jar

    Released 17 Oct 2026 · 4.9 MB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade C

    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

    • Many modpacks removed it−9 points
    • First release only 3 months ago−6 points
    • Under 5 million downloads−2 points
    All 11 criteria

    • Maintenance

      Full points21 / 21
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.8 days ago (17 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. 65% of the 995 popular NeoForge 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.Does not apply. The project is under 6 months old.

    • Stability

      9 points lost6 / 15
      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.7 of the 19 modpacks with two or more versions removed it in a later one (37%) See the 7 modpacks1 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Does not apply. The project is under 6 months old.
      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 · Brassworks-smp/OPAC-Essentials 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · Brassworks-smp/OPAC-Essentials 3 / 3

    • Popularity

      2 points lost2 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.18,537 2 / 4

    • Track record

      6 points lost2 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.3 months, 5 releases 2 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file for recent Minecraft versions. See Security
    Total71 / 100

    41.4 of the 58 points that apply = 71 out of 100. The points above are rounded to whole numbers.

    About

    Open Parties and Claims Essentials is an addon that extends Open Parties and Claims with configurable commands, party chat, detailed claim permissions, and a claim search for Xaero’s World Map. Server owners can rename its commands, and players can use short aliases including argument-free /claim and /unclaim shortcuts that act on the chunk they are standing in. Party chat supports direct messages, toggling chat on or off, and checking its status, while using OPAC’s native message handling and formatting. Claim owners can set exceptions for specific registry entries in claims and subclaims, with rules applying either to everyone or to selected players. Permissions cover block interaction, breaking, and placement; block-entity interaction and breaking; entity interaction and attacks; and throwing or using items and projectiles, including projectile impacts. The permission interface offers registry search and suggestions, player-specific assignments, bulk changes, and staged edits that take effect only after saving; permissions can also be managed through commands. With Xaero’s World Map installed, players can search for another player’s claim clusters, navigate between disconnected clusters, and see the selected cluster outlined on the map.

    Written from Modrinth and CurseForge . How we write it

    In-game changes

    Changes the game's code in 1 area: Networking and multiplayerChanges 1 game code file in this area: connections, the server list and what is sent between your game and a server..

    Adds no new blocks, items or other content.

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

    Often used with it

    See all 30
    Create DecoBCreate: Copycats+AFerriteCoreAJade Addons (Neo/Forge)ACreate: Enchantment IndustryA

    Details

    Creators
    Brassworks (DerErneuerer)
    License
    Apache License 2.0
    Downloads
    19K
    Created
    9 Nov 2025
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues , Discord

    Security

    No harmful code found

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

    What it can do on your computer

    Starts other programs
    It can start another program on your computer. Found in brassui, a library it includes.
    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. Found in brassui, a library it includes. See Privacy
    Creates settings files
    The mod keeps its settings in the config folder of your game, where you can change or delete them. 1 file in your config folder.

    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 18 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, for a recent version. 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, 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 · 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 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

    No sign so far that AI was used to make it

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

    We have not read its code history yet.

    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 · 5 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.
      Not read yet
    • 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
      7 of 11 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
    • 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
      1,125 code files read

    Compatibility

    See all 5 files
    NeoForge
    1.2126.126.2

    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 on the server. If your game has it too, you get extra features.
    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.
    CreateB
    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 the newest Minecraft version.

    Modpacks using this project

    Find modpacks with it

    Modpacks that include Open Parties and Claims - Essentials in at least one of their versions, most downloaded first.

    ModpackDownloadsLast version with it
    Create: Brassworks34K downloadslast version with it 18 Oct 2026Arcadia Cobblemon Modpack13K downloadslast version with it 1 Aug 2026Architecture & Automatum8.4K downloadslast version with it 4 Oct 2026Hikari Haven Cobblemon5.2K downloadslast version with it 13 Oct 2026RE:Rotaria4.4K downloadslast version with it 26 Jun 2026Createrington Rails 'n Sails3.4K downloadslast version with it 23 Oct 2026Yippee MC SMP - Client Pack2.8K downloadslast version with it 11 Jul 2026Steamon2.4K downloadslast version with it 23 Aug 2026Create AeronauticsPLUS2.2K downloadslast version with it 29 Jun 2026Rusty's Create1.9K downloadslast version with it 13 Sep 2026
    1 to 10 of 23123

    Often in the same modpacks

    Mods that modpacks often add together with Open Parties and Claims - Essentials. Share: how many of the modpacks with Open Parties and Claims - Essentials also have that mod.

    ProjectTypeShareGrade
    Create DecoBModin 87% of the modpacks with Open Parties and Claims - EssentialsCreate: Copycats+AModin 83% of the modpacks with Open Parties and Claims - EssentialsFerriteCoreAModin 83% of the modpacks with Open Parties and Claims - EssentialsJade Addons (Neo/Forge)AModin 78% of the modpacks with Open Parties and Claims - EssentialsCreate: Enchantment IndustryAModin 78% of the modpacks with Open Parties and Claims - EssentialsLithiumAModin 78% of the modpacks with Open Parties and Claims - EssentialsCreate: ConnectedAModin 74% of the modpacks with Open Parties and Claims - EssentialsCreate Slice & DiceAModin 74% of the modpacks with Open Parties and Claims - EssentialsCreate AeronauticsBModin 70% of the modpacks with Open Parties and Claims - EssentialsChunkyAModin 70% of the modpacks with Open Parties and Claims - Essentials
    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·NeoForge2.32.3 · opac_essentials-2.3.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    5 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1The latest file for its Minecraft version and loader·NeoForge2.32.3 · opac_essentials-2.3.jar (main file)·17 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    1.21.1·NeoForge2.2.12.2.1 · opac_essentials-2.2.1.jar (main file)·4 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    1.21.1·NeoForge2.22.2 · opac_essentials-2.2.jar (main file)·23 Aug 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 4.7 MB
    1.21.1·NeoForge2.12.1 · opac_essentials-2.1.jar (main file)·2 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 114.1 KB
    1.21.1·NeoForge2.02.0 · opac_essentials-2.0.jar (main file)·2 Aug 2026PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 85.8 KB