FetchJS

FetchJS provides simple methods that allow you to make HTTP requests, send data, or download files directly from KubeJS scripts.

FetchJS

FetchJS provides simple methods that allow you to make HTTP requests, send data, or download files directly from KubeJS scripts.


Basic Usage

The Fetch method works similarly to the web-based fetch API. It can be used to call APIs or send data to servers.

A common use case is for modpacks to retrieve official announcements, or dynamically update configuration files from a GitHub repository.

FetchJS.fetch(
    \"https://zenquotes.io/api/random\",
    data => event.player.tell(data)
);

The URL above returns a random quote — useful for testing.


The Download method is used for downloading files such as images or mods.

FetchJS.download(
    \"https://raw.githubusercontent.com/Tower-of-Sighs/SmartKeyPrompts/refs/heads/master/libs/SlashBladeResharped-1.20.1-1.3.40.jar\",
    "mods/SlashBladeResharped-1.20.1-1.3.40.jar",
    progress => {
        event.player.displayClientMessage(Component.literal("Downloading " + Math.round(progress * 100) + "%"), true);
    }
);

In this example, the method downloads the SlashBlade mod directly into the mods folder and displays real-time download progress to the player.

Downloading images is usually faster and more practical— please, use it responsibly. 😄


Advanced Usage

The examples above demonstrate the simplified usage. For more complete control, you can use the extended versions of these methods:

boolean fetch(String url,
              String method,
              Map<String, String> headers,
              String jsonBody,
              Map<String, String> formData,
              int timeoutMillis,
              Consumer<String> callback);

boolean download(String url, 
                 String path, 
                 Map<String, String> headers, 
                 int timeoutMillis, 
                 Consumer<Double> progressCallback);

You can safely pass null for unused parameters. timeoutMillis defines the maximum time (in milliseconds) to wait before a connection fails — for example, GitHub’s default limit is around 20,000 ms.

In most cases, the simplified methods should meet your needs. The extended versions have not been deeply tested, so use them carefully.

If you’re unsure how to use these parameters, refer to the official Fetch API documentation.


Notes

This mod is a bit experimental — who knows how long it’ll last. Use it while it lives, and enjoy it while you can.

The FetchJS Team

HighCrafter tier frameprofile avatar
  • 46
    Followers
  • 28
    Projects
  • 9.5M
    Downloads

More from MerrySnowView all

  • One Enough Damage project image

    One Enough Damage

    • 64
    • Mods

    Freely adjust mob damage, hardcoded damage and many skill-based damage.

    • 64
    • July 10, 2026
    • Mods
  • TaCZ addon project image

    TaCZ addon

    • 6.3M
    • Mods

    An expansion mod for TaCZ about better attachment managing.

    • 6.3M
    • July 9, 2026
    • Mods
  • Strike After Swing project image

    Strike After Swing

    • 225
    • Mods

    Delays mob melee damage until the attack swing animation finishes.

    • 225
    • June 29, 2026
    • Mods
  • Extreme Evasion project image

    Extreme Evasion

    • 287
    • Mods

    ExtremeEvasion adds a timing-based evasive combat system to Minecraft. Roll away at the right moment, bait an enemy attack, and turn that perfect dodge into a short burst of counterattack power.

    • 287
    • June 29, 2026
    • Mods
  • One Enough Damage project image

    One Enough Damage

    • 64
    • Mods

    Freely adjust mob damage, hardcoded damage and many skill-based damage.

    • 64
    • July 10, 2026
    • Mods
  • TaCZ addon project image

    TaCZ addon

    • 6.3M
    • Mods

    An expansion mod for TaCZ about better attachment managing.

    • 6.3M
    • July 9, 2026
    • Mods
  • Strike After Swing project image

    Strike After Swing

    • 225
    • Mods

    Delays mob melee damage until the attack swing animation finishes.

    • 225
    • June 29, 2026
    • Mods
  • Extreme Evasion project image

    Extreme Evasion

    • 287
    • Mods

    ExtremeEvasion adds a timing-based evasive combat system to Minecraft. Roll away at the right moment, bait an enemy attack, and turn that perfect dodge into a short burst of counterattack power.

    • 287
    • June 29, 2026
    • Mods