Backblaze B2 Cloud Storage API

by backblaze.com

Hosting and storage Added on November 1st, 2026 Checked and working on November 1st, 2026

What it does

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
JSON
MCP
REST

At a glance

API key: Needed, free · More APIs with a free key
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

More information: https://www.backblaze.com/docs/cloud-storage-native-api

Compare: Backblaze B2 Cloud Storage API vs Cloudflare R2

Is this your service? Show that it is listed

Put this badge on your website or in your README; it links to this page. About the badge

HTML

<a href="https://free-web-services.com/web-services/web-development/hosting/backblaze-b2-cloud-storage-api.html"><img src="https://free-web-services.com/badge.svg" width="208" height="44" alt="Listed on Free Web Services" /></a>

Markdown

[![Listed on Free Web Services](https://free-web-services.com/badge.svg)](https://free-web-services.com/web-services/web-development/hosting/backblaze-b2-cloud-storage-api.html)

Backblaze B2 Cloud Storage API — backblaze.com

Example request

curl

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

JavaScript

const response = await fetch("https://api.backblazeb2.com/b2api/v3/b2_authorize_account", {
  headers: {
    "Authorization": "Basic base64(YOUR_KEY_ID:YOUR_API_KEY)",
  },
});
const data = await response.json();
console.log(data);

Python

import requests

response = requests.get(
    "https://api.backblazeb2.com/b2api/v3/b2_authorize_account",
    headers={
        "Authorization": "Basic base64(YOUR_KEY_ID:YOUR_API_KEY)",
    },
    timeout=30,
)
print(response.json())

Replace YOUR_API_KEY with your own key.