Cloud Storage APIs

Cloud storage and file sharing

15 APIs in this category · last checked 2 October 2026
15
APIs listed
3
need no API key (20%)
1
CORS enabled (7%)
15
HTTPS (100%)

This directory lists 15 cloud storage APIs. 1 of them require no API key and support CORS, so you can call them directly from browser JavaScript with no backend and no sign-up. Every entry shows whether it needs authentication, serves over HTTPS and allows cross-origin requests, so you can pick one that fits your stack before you read a single doc page.

Showing 15 of 15 APIs

Best Cloud Storage APIs for Developers

A cloud storage API allows developers to upload, download, share, and manage files on remote storage platforms without managing server infrastructure. These APIs are the foundation of file-sharing features, backup systems, and document collaboration tools.

Dropbox, Box and Google Drive are the safest long term picks for file storage: mature OAuth2 APIs, large ecosystems and free developer accounts to test against, though expect an app review step before going live.

For quick prototyping, Pantry needs no signup and gives free JSON storage in seconds, while GoFile and File.io allow no-key anonymous uploads for throwaway files. Pinata suits web3 projects needing IPFS pinning with a usable free tier, and Storj suits anyone wanting S3-compatible storage without AWS pricing. The pitfall: anonymous file hosts here have a history of vanishing overnight, as AnonFiles and BayFiles did in 2023, so never build a production feature on one without a backup plan.

What to check before you pick one

  • Storage limits: Free tiers vary widely; compare storage quotas and transfer limits before committing to an API.
  • Resumable uploads: For large file transfers, ensure the API supports resumable uploads to handle network interruptions gracefully.
  • Access control: Fine-grained permission models let you share files with specific users or make them publicly accessible.

Frequently Asked Questions

What are cloud storage APIs?

Cloud storage APIs provide programmatic access to file upload, download, sharing, and management on platforms like Google Drive, Dropbox, and OneDrive, enabling you to build file-centric features without managing server infrastructure.

Is the Dropbox API free to use?

Yes. Dropbox offers a free API tier for apps that access only their own app folder. Apps that require access to the full Dropbox folder need user approval and may be subject to Dropbox's usage policies.

How do I upload files to cloud storage via an API?

Most cloud storage APIs accept multipart form uploads or binary streams over HTTPS. Authenticate with OAuth or an API key, then POST your file to the designated upload endpoint.