# Backblaze B2 Cloud Storage API

Category: [Hosting and storage](https://free-web-services.com/web-services/web-development/hosting/)  
Page: https://free-web-services.com/web-services/web-development/hosting/backblaze-b2-cloud-storage-api.html  
Documentation: https://www.backblaze.com/docs/cloud-storage-native-api

Backblaze B2 is object storage in the cloud for files, backups, images and other website assets. Apps upload, list and download files through the B2 Native API (JSON over HTTPS) or through its S3-compatible API, so existing S3 tools and SDKs work with it. Every request uses an application key from a Backblaze account. Free for the first 10 GB of storage; more storage is paid per GB. An official MCP server (npm package @backblaze-labs/b2-mcp) lets AI agents work with B2 buckets and files.

- API key: Needed, free
- Pricing: Free for the first 10 GB of storage; more storage is paid per GB.
- Formats: JSON
- Interface: REST, MCP
- Provider: backblaze.com
- Last checked: Working on November 1st, 2026

Example request:

```sh
curl 'https://api.backblazeb2.com/b2api/v3/b2_authorize_account' \
  -H 'Authorization: Basic base64(YOUR_KEY_ID:YOUR_API_KEY)'
```

Replace YOUR_API_KEY with your own key.