CDNJS

API

Free API for accessing CDNJS library metadata

Overview

The CDNJS API provides programmatic access to metadata for open-source libraries hosted on the CDNJS content delivery network. Key endpoints include listing all libraries (e.g., /libraries) and retrieving detailed info for a specific library (e.g., /libraries/jquery). Responses are in JSON format, containing data like versions, file URLs, licenses, and author details. Use cases include dynamically fetching CDN URLs for projects, checking library versions for updates, and integrating metadata into developer documentation or build tools. It supports RESTful interactions and requires no authentication.

Example Integration (JavaScript)

script.js JS


fetch('https://api.cdnjs.com/libraries/jquery')
  .then(res => res.json())
  .then(data => console.log(data))
  .catch(err => console.error(err));

Key Features

RESTful API design
JSON response format
No authentication required
Access to library metadata (versions, files, licenses)
Supports list and detail library queries

Frequently Asked Questions

? Is CDNJS API free to use?

Yes, the CDNJS API is completely free for public use with no charges or subscription requirements.

? Does it require an API Key?

No, the CDNJS API does not require an API key to access its public endpoints for library metadata.

? What is the response format?

The CDNJS API returns all responses in JSON format, which is lightweight and easy to parse in most programming languages.

Top Alternatives

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Tool Info

Pricing Free

Category Development

Platform Public API

Pros

⊕ Completely free to use
⊕ No API key needed for access
⊕ Fast and reliable CDN-backed service
⊕ Comprehensive metadata for libraries
⊕ Easy integration into developer workflows

Cons

⊖ Rate limits may apply for high-volume requests
⊖ Limited to libraries hosted on CDNJS
⊖ No official SLA for uptime guarantees
⊖ Metadata updates may lag slightly for newly added libraries