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Cloudflare R2

Cloud Storage

Zero egress fee cloud storage (S3-compatible)

Cloudflare R2 is an S3-compatible object storage service that charges zero egress bandwidth fees. Perfect for serving media and assets.

Details

Auth Type
AWS Signature Version 4 (Access Key + Secret)
Rate Limit
1000 req/s
Pricing
$0.015/GB storage; Zero egress fees
Full Docs
Step 1: Save your provider key

This is NOT your Callio key. Enter the API key from the provider's dashboard (e.g. OpenAI/SendGrid).

AWS Signature Version 4 (Access Key + Secret)

1. Go to Cloudflare dashboard > R2 2. Select Manage R2 API Tokens 3. Create a token and copy Access + Secret keys

Get API Credentials

Getting Started

1

Try It Instantly

Click "Try It" above to test the API in the playground

2

Add to Your Agent

Click "Add to Agent" to get your API key and integrate

Common Use Cases

Media hosting
Data lakes
Zero-egress file delivery
E-commerce assets
Log storage

💻 Code Examples

Get started quickly with these code examples in your favorite language

curl -X GET \
  'https://www.callio.dev/api/proxy/cloudflare-r2/endpoint' \
  -H 'Authorization: Bearer YOUR_CALLIO_KEY' \
  -H 'Content-Type: application/json'

💡 Tip: Replace YOUR_CALLIO_KEY with your actual Callio API key from the dashboard.

Ready to integrate Cloudflare R2?

Test endpoints live or generate your API key and start building in minutes

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