Cloudflare R2

by developers.cloudflare.com

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

What it does

Cloudflare R2 stores files in the cloud and serves them without fees for outgoing data. It speaks the Amazon S3 API, so existing S3 SDKs and tools can upload, list and download objects; there is also a Workers API for code that runs on Cloudflare. Access uses API tokens from a Cloudflare account. Free each month for 10 GB of storage, 1 million write and 10 million read operations; usage above that is paid. An official Cloudflare MCP server at https://mcp.cloudflare.com/mcp lets AI agents manage R2 buckets and other Cloudflare resources.

API
MCP
REST
XML

At a glance

API key: Needed, free · More APIs with a free key
Pricing: Free each month for 10 GB of storage, 1 million write and 10 million read operations; usage above that is paid.
Formats: XML
Interface: REST, MCP
Provider: developers.cloudflare.com
Last checked: Working on November 1st, 2026

More information: https://developers.cloudflare.com/r2/api/s3/api/

Compare: Backblaze B2 Cloud Storage API vs Cloudflare R2

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HTML

<a href="https://free-web-services.com/web-services/web-development/hosting/cloudflare-r2.html"><img src="https://free-web-services.com/badge.svg" width="208" height="44" alt="Listed on Free Web Services" /></a>

Markdown

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Cloudflare R2 — developers.cloudflare.com

Example request

curl

curl 'https://YOUR_ACCOUNT_ID.r2.cloudflarestorage.com/' \
  -H 'Authorization: AWS4-HMAC-SHA256 Credential=YOUR_API_KEY/20261101/auto/s3/aws4_request, SignedHeaders=host;x-amz-date, Signature=...'

JavaScript

const response = await fetch("https://YOUR_ACCOUNT_ID.r2.cloudflarestorage.com/", {
  headers: {
    "Authorization": "AWS4-HMAC-SHA256 Credential=YOUR_API_KEY/20261101/auto/s3/aws4_request, SignedHeaders=host;x-amz-date, Signature=...",
  },
});
const text = await response.text();
console.log(text);

Python

import requests

response = requests.get(
    "https://YOUR_ACCOUNT_ID.r2.cloudflarestorage.com/",
    headers={
        "Authorization": "AWS4-HMAC-SHA256 Credential=YOUR_API_KEY/20261101/auto/s3/aws4_request, SignedHeaders=host;x-amz-date, Signature=...",
    },
    timeout=30,
)
print(response.text)

Replace YOUR_API_KEY with your own key.