Cloudflare R2

S3-compatible object storage with zero egress fees, built on Cloudflare's global network, ideal for storing assets that need to be served globally without bandwidth costs.

Evaluated Mar 06, 2026 (0d ago) vcurrent

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⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

100

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

S3-compatible API with Cloudflare API tokens scoped to R2. No egress fees. SOC2 Type II. Encryption at rest. Public buckets or signed URL access. Works as S3 drop-in replacement for agents.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

An agent needs cost-effective object storage where data will be read frequently from multiple locations, and egress fees are a concern.

Avoid When

You need the full AWS S3 feature set or are already heavily invested in the AWS ecosystem.

Use Cases

• Storing agent-generated files with zero egress cost for retrieval
• Public asset hosting with global CDN distribution
• Cross-cloud data sharing without vendor lock-in (S3 compatible)
• Cost-effective backup and archive storage
• ML model and dataset storage accessible from anywhere

Not For

• Teams already deep in AWS ecosystem (migration overhead)
• Workloads requiring advanced S3 features like object lock or inventory
• Real-time streaming or database workloads

Interface

REST API

Yes

GraphQL

gRPC

MCP Server

SDK

Yes

Webhooks

Authentication

Methods: api_key

OAuth: No Scopes: Yes

R2 API tokens with configurable permissions. S3-compatible authentication (access key + secret key format) for compatibility with existing S3 tools. HMAC keys for S3 API access.

Pricing

Model: freemium

Free tier: Yes

Requires CC: No

Zero egress fees is the killer feature. Free tier is genuinely generous for development and small production workloads.

Agent Metadata

Pagination

cursor

Idempotent

Full

Retry Guidance

Documented

Known Gotchas

⚠ Not all S3 features are supported (no Object Lock, Inventory, etc.)
⚠ Requires Cloudflare account - cannot use without registering
⚠ Custom domain setup required for public R2 bucket access
⚠ Event notifications (for triggering agents on upload) only available via R2 + Queues integration
⚠ No MCP server available

Alternatives

aws-s3-api gcs-api backblaze-b2

Full Evaluation Report

Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Cloudflare R2.

$99

API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-03-06.