Julia Packages Scraper

Scrape Julia package metadata from the official Julia General Registry. Search for packages by name or fetch specific packages — get UUID, latest version, repository URL, dependencies, and more.

Features

• Search packages by name query (prefix and substring matching)
• Fetch specific packages by exact name
• Extracts: package name, UUID, latest version, repository URL, dependencies, source URL
• No authentication required — uses publicly available GitHub raw content
• Handles the full Julia General Registry (10,000+ packages)

Input

Field	Type	Description	Default
mode	String (select)	searchPackages or getByName	searchPackages
searchQuery	String	Name query for package search	DataFrames
packageNames	Array of strings	Exact package names for getByName mode	[]
maxItems	Integer (1–500)	Maximum number of records to return	10

Mode: searchPackages

Search the Julia General Registry for packages whose name matches the query string. Prefix matches are ranked first, followed by substring matches.

Example input:

{
  "mode": "searchPackages",
  "searchQuery": "DataFrames",
  "maxItems": 10
}

Mode: getByName

Fetch specific packages by their exact registered name (case-insensitive).

Example input:

{
  "mode": "getByName",
  "packageNames": ["DataFrames", "Plots", "Flux"],
  "maxItems": 10
}

Output

Each record contains:

Field	Type	Description
packageName	String	Registered package name
uuid	String	Unique identifier from registry
version	String	Latest registered version
repositoryUrl	String	Git repository URL
description	String	Package description (if available)
license	String	License (if specified in Package.toml)
dependencies	Array	Names of direct dependencies
sourceUrl	String	JuliaHub package page URL
registryUrl	String	GitHub registry entry URL
recordType	String	Always "package"
scrapedAt	String	ISO 8601 timestamp

Sample Output Record

{
  "packageName": "DataFrames",
  "uuid": "a93c6f00-e57d-5684-b7b6-d8193f3e46c0",
  "version": "1.8.2",
  "repositoryUrl": "https://github.com/JuliaData/DataFrames.jl.git",
  "dependencies": [
    "CategoricalArrays",
    "DataAPI",
    "DataStructures",
    "InvertedIndices",
    "PooledArrays",
    "PrettyTables",
    "Printf",
    "Random",
    "Reexport",
    "SentinelArrays",
    "SortingAlgorithms",
    "Statistics",
    "TableTraits",
    "Tables",
    "Unicode"
  ],
  "sourceUrl": "https://juliahub.com/ui/Packages/DataFrames",
  "registryUrl": "https://github.com/JuliaRegistries/General/tree/master/D/DataFrames",
  "recordType": "package",
  "scrapedAt": "2026-05-30T12:00:00+00:00"
}

Data Source

Data is sourced directly from the Julia General Registry on GitHub — the official central registry for Julia packages. No authentication is required.

FAQs

Q: How many Julia packages are in the registry? A: The Julia General Registry contains over 10,000 registered packages.

Q: Does the actor require a GitHub API token? A: No. The actor fetches raw TOML files directly from raw.githubusercontent.com, which does not require authentication.

Q: What if a package has no description? A: The description field is omitted. Julia's Package.toml format does not always include a description field.

Q: How is the latest version determined? A: The actor reads Versions.toml from the registry and takes the last listed version entry.

Q: Why is there a registryUrl and a sourceUrl? A: registryUrl points to the package's folder in the Julia General Registry on GitHub. sourceUrl points to the JuliaHub page, which provides a richer browsing experience.

Q: Can I fetch a specific version? A: The actor always retrieves the latest registered version. Fetching specific versions is not supported.