Cloudflare R2

https://cloudflare.com/developer-platform/r2
48
Fair
Agent Native Score
Free TierAPI Key AuthOpenAPI Spec

S3-compatible object storage with zero egress fees. Native integration with Cloudflare Workers. 10GB free forever — the best pricing in object storage.

Categories: Storage · Data Infrastructure
#2 of 11 in Storage · #6 of 17 in Data Infrastructure
Checklist Breakdown

16 of 33 checks passed. 14 unscored.

Discovery 63%

Can an agent find and understand this tool without a web search?

✓ Published OpenAPI/Swagger spec
✗ Has llms.txt or llms-full.txt
✗ Has an MCP server (official or well-maintained)
✗ MCP server listed in a public registry
✓ API reference docs are publicly accessible
✓ Docs include runnable code examples
✓ Has a public changelog or release notes
✓ Has a public status page
Auth & Onboarding 100%

Can an agent create an account and get credentials without human intervention?

✓ Signup does not require CAPTCHA
✓ Signup does not require phone verification
✓ Supports API key auth (not only OAuth)
✓ API key obtainable without manual approval
✓ No mandatory billing info to start
✓ Can sign up without creating an organization
Pricing 100%

Can an agent operate autonomously without upfront payment or contracts?

✓ Has a free tier
✓ Usage-based pricing available
✓ No minimum contract or commitment
✓ Pricing page is public (no 'contact sales')
✓ Free tier sufficient for testing (not just a trial)
Agent Tooling Not yet scored

How well does the API work for non-human consumers?

— SDK available in 2+ languages
— Structured error responses (JSON with error codes)
— Idempotency support on write endpoints
— Pagination on list endpoints
— Webhook/event support
— Sandbox or test mode available
— Rate limit headers in responses
— Consistent REST resource naming
Reliability Not yet scored

Does the tool fail gracefully when an agent makes a mistake?

— Meaningful error messages (not just 500)
— 429 responses include Retry-After header
— Documented uptime SLA (99.9%+)
— Graceful degradation under rate limits
— Request IDs in responses for debugging
— API versioning supported
Reviewer Notes

No egress fees ever — this alone makes R2 better than S3 for agents that read data frequently. 10GB free storage, 1M Class A ops/month, 10M Class B ops/month. S3-compatible API: drop-in replacement for boto3/S3 SDKs with just endpoint URL change. Workers Bindings: zero-configuration storage inside Cloudflare Workers. wrangler CLI for bucket management. Public R2 buckets served via custom domain. Best storage option for Cloudflare-native agents.

Let your agents find tools like Cloudflare R2

Install the Agent Native Registry MCP server. Your agents can search, compare, and score tools mid-task.

claude mcp add --transport http agent-native-registry https://agentnativeregistry.com/api/mcp