Cloudflare R2

Cloudflare R2 is S3-compatible object storage with zero egress fees. It provides both an S3-compatible REST API and a Cloudflare API for managing buckets, objects, and storage policies at global scale. R2 offers a generous free tier including 10 GB storage, 1 million Class A operations, and 10 million Class B operations per month with no data transfer fees.

Cloudflare R2 publishes 14 APIs on the APIs.io network, including Buckets API, CORS API, Credential Management API, and 11 more. Tagged areas include Object Storage, Cloud Storage, S3 Compatible, Egress-Free, and Buckets.

The Cloudflare R2 catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

Cloudflare R2’s developer surface includes authentication, documentation, engineering blog, pricing, and 16 more developer resources.

🌐 Visit website 📡 Source on GitHub

43.9/100 developing ▬ flat Agent 28/100 agent aware open core · BSD-3-Clause Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemiumSelf serve⚡ Free to try

2 APIs

Object Storage Cloud Storage S3 CompatibleEgress-FreeBuckets Developer Platform Cloudflare

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 43.9/100 · developing

Contract Quality 12.8 / 20

Developer Ergonomics 3.4 / 16

Access Clarity 8.0 / 16

Operational Transparency 5.5 / 10

Contract Governance 0.9 / 10

Discoverability 5.5 / 8

Open Source Surface 4.0 / 10

Create-or-Update Ergonomics 0.0 / 10

Agent readiness — 28/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 7 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Open Source Surface applies to this provider. This product is open source and we read its repository directly, so Open Source Surface carries 10 points of the composite. It is scored from what the repository actually publishes — a security policy, a contribution guide, a release history, a code of conduct — read live from the provider rather than inferred from our own catalog pointers. This facet adds; nothing was taken away to make room for it. An open-source project is not excused from the commercial facets, because exemption would strip it of the points it does earn. If we have the wrong repository, or this product is not open source, say so on your provider repo and we will drop the facet rather than have you publish against it.

Create-or-Update Ergonomics applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.

The six quality facets above are damped to 80 points between them, because the conditional facet above carries the other 20. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 80% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/cloudflare-r2: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 14

Individual APIs this provider publishes, each with its own machine-readable definition.

Cloudflare R2 Buckets API

The Buckets API from Cloudflare R2 — 2 operation(s) for buckets.

Cloudflare R2 CORS API

The CORS API from Cloudflare R2 — 1 operation(s) for cors.

Cloudflare R2 Credential Management API

The Credential Management API from Cloudflare R2 — 1 operation(s) for credential management.

Cloudflare R2 Lifecycle API

The Lifecycle API from Cloudflare R2 — 1 operation(s) for lifecycle.

Cloudflare R2 Maintenance Configuration API

The Maintenance Configuration API from Cloudflare R2 — 1 operation(s) for maintenance configuration.

Cloudflare R2 Multipart Upload API

The Multipart Upload API from Cloudflare R2 — 4 operation(s) for multipart upload.

Cloudflare R2 Namespace Management API

The Namespace Management API from Cloudflare R2 — 1 operation(s) for namespace management.

Cloudflare R2 Objects API

The Objects API from Cloudflare R2 — 3 operation(s) for objects.

Cloudflare R2 R2 Account API

The R2 Account API from Cloudflare R2 — 1 operation(s) for r2 account.

Cloudflare R2 R2 Bucket API

The R2 Bucket API from Cloudflare R2 — 13 operation(s) for r2 bucket.

Cloudflare R2 R2 Catalog Management API

The R2 Catalog Management API from Cloudflare R2 — 4 operation(s) for r2 catalog management.

Cloudflare R2 R2 Object API

The R2 Object API from Cloudflare R2 — 2 operation(s) for r2 object.

Cloudflare R2 Table Maintenance Configuration API

The Table Maintenance Configuration API from Cloudflare R2 — 1 operation(s) for table maintenance configuration.

Cloudflare R2 Table Management API

The Table Management API from Cloudflare R2 — 1 operation(s) for table management.

Scroll for all 14

Open Collections 15

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets CORS API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets Credential Management API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets Lifecycle API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets Maintenance Configuration API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets Multipart Upload API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets Namespace Management API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets Objects API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets R2 Account API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets R2 Bucket API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets R2 Catalog Management API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets R2 Object API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets Table Maintenance Configuration API

OPEN COLLECTION

Cloudflare R2 Cloudflare Buckets Table Management API

OPEN COLLECTION

Scroll for all 15

Pricing Plans 1

Published pricing tiers and plan structures.

Cloudflare R2 Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Cloudflare R2 Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Cloudflare R2 Finops

FINOPS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Cloudflare R2 Context

0 classes · 43 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Cloudflare R2 API Rules

5 rules · 3 warnings 2 info

SPECTRAL

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

R2 Bucket

5 properties

JSON SCHEMA

R2 Cors Rule

4 properties

JSON SCHEMA

R2 Lifecycle Config

1 properties

JSON SCHEMA

R2 R2 Object

8 properties

JSON SCHEMA

R2 Temp_Access_Creds_Request

6 properties

JSON SCHEMA

R2 Temp_Access_Creds_Response

3 properties

JSON SCHEMA

Examples 4

Example request and response payloads for these APIs.

Cloudflare R2 Lifecycle Config Example

1 fields

EXAMPLE

Cloudflare R2 List Buckets Example

5 fields

EXAMPLE

Cloudflare R2 List Objects Example

4 fields

EXAMPLE

Cloudflare R2 Temp Credentials Example

2 fields

EXAMPLE

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Cloudflare R2 Authentication

apiKey/http · 5 schemes

SECURITY

Cloudflare R2 Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Cloudflare R2 Vulnerability Disclosure

Hackerone · security.txt · contact published

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Cloudflare R2 Agentic Access

67 operations · 37 acting · 2 human-in-the-loop

67 operations · 37 acting

AGENTIC

Resources

Documentation 2

Reference material describing how the API behaves

ContributionGuide

ContributionGuide

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 3

SDKs, sample code, and the tooling you integrate with

CodeOfConduct

CodeOfConduct

GitHubOrg

GitHubOrg

GitHubRepo

GitHubRepo

Access & Security 3

Authentication, authorization, and security posture

VulnerabilityDisclosure

VulnerabilityDisclosure

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 3

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

License

Pricing

Plans

FinOps

Company 3

The organization behind the API

Website

Website

LinkedIn

Blog

Blog

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

aid: cloudflare-r2
name: Cloudflare R2
description: Cloudflare R2 is S3-compatible object storage with zero egress fees. It provides both an S3-compatible REST API
  and a Cloudflare API for managing buckets, objects, and storage policies at global scale. R2 offers a generous free tier
  including 10 GB storage, 1 million Class A operations, and 10 million Class B operations per month with no data transfer
  fees.
type: Index
deliveryModel:
  model: open-core
  license: BSD-3-Clause
  open_source: true
  commercial: true
  callable_host: true
  label: Open core · an OSS project plus a commercial hosted product
  confidence: high
  source:
  - license
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/cloudflare-r2.png
url: https://raw.githubusercontent.com/api-evangelist/cloudflare-r2/refs/heads/main/apis.yml
created: 2026-06-13
modified: 2026-06-13
specificationVersion: '0.23'
tags:
- Object Storage
- Cloud Storage
- S3 Compatible
- Egress-Free
- Buckets
- Developer Platform
- Cloudflare
tags_raw:
- Object Storage
- Cloud Storage
- S3-Compatible
- Egress-Free
- Buckets
- Developer Platform
- Cloudflare
apis:
- aid: cloudflare-r2:cloudflare-r2-buckets-api
  name: Cloudflare R2 Buckets API
  description: The Buckets API from Cloudflare R2 — 2 operation(s) for buckets.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Buckets
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-buckets-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-cors-api
  name: Cloudflare R2 CORS API
  description: The CORS API from Cloudflare R2 — 1 operation(s) for cors.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - CORS
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-cors-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-credential-management-api
  name: Cloudflare R2 Credential Management API
  description: The Credential Management API from Cloudflare R2 — 1 operation(s) for credential management.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Credential Management
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-credential-management-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-lifecycle-api
  name: Cloudflare R2 Lifecycle API
  description: The Lifecycle API from Cloudflare R2 — 1 operation(s) for lifecycle.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Lifecycle
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-lifecycle-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-maintenance-configuration-api
  name: Cloudflare R2 Maintenance Configuration API
  description: The Maintenance Configuration API from Cloudflare R2 — 1 operation(s) for maintenance configuration.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Maintenance Configuration
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-maintenance-configuration-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-multipart-upload-api
  name: Cloudflare R2 Multipart Upload API
  description: The Multipart Upload API from Cloudflare R2 — 4 operation(s) for multipart upload.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Multipart Upload
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-multipart-upload-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-namespace-management-api
  name: Cloudflare R2 Namespace Management API
  description: The Namespace Management API from Cloudflare R2 — 1 operation(s) for namespace management.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Namespace Management
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-namespace-management-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-objects-api
  name: Cloudflare R2 Objects API
  description: The Objects API from Cloudflare R2 — 3 operation(s) for objects.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Objects
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-objects-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-r2-account-api
  name: Cloudflare R2 R2 Account API
  description: The R2 Account API from Cloudflare R2 — 1 operation(s) for r2 account.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - R2 Account
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-r2-account-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-r2-bucket-api
  name: Cloudflare R2 R2 Bucket API
  description: The R2 Bucket API from Cloudflare R2 — 13 operation(s) for r2 bucket.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - R2 Bucket
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-r2-bucket-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-r2-catalog-management-api
  name: Cloudflare R2 R2 Catalog Management API
  description: The R2 Catalog Management API from Cloudflare R2 — 4 operation(s) for r2 catalog management.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - R2 Catalog Management
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-r2-catalog-management-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-r2-object-api
  name: Cloudflare R2 R2 Object API
  description: The R2 Object API from Cloudflare R2 — 2 operation(s) for r2 object.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - R2 Object
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-r2-object-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-table-maintenance-configuration-api
  name: Cloudflare R2 Table Maintenance Configuration API
  description: The Table Maintenance Configuration API from Cloudflare R2 — 1 operation(s) for table maintenance configuration.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Table Maintenance Configuration
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-table-maintenance-configuration-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
- aid: cloudflare-r2:cloudflare-r2-table-management-api
  name: Cloudflare R2 Table Management API
  description: The Table Management API from Cloudflare R2 — 1 operation(s) for table management.
  humanURL: https://developers.cloudflare.com/r2/api/s3/api/
  baseURL: https://<ACCOUNT_ID>.r2.cloudflarestorage.com
  tags:
  - Table Management
  properties:
  - type: OpenAPI
    url: openapi/cloudflare-r2-table-management-api-openapi.yml
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/s3/api/
  - type: Documentation
    url: https://developers.cloudflare.com/r2/api/
common:
- type: IssueTracker
  url: https://github.com/cloudflare/api-schemas/issues
- type: CodeOfConduct
  url: https://github.com/cloudflare/.github/blob/master/CODE_OF_CONDUCT.md
- type: ContributionGuide
  url: https://github.com/cloudflare/.github/blob/master/CONTRIBUTING.md
- type: License
  name: BSD-3-Clause
  url: https://github.com/cloudflare/api-schemas/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/cloudflare-r2-agentic-access.yml
- type: VulnerabilityDisclosure
  url: security/cloudflare-r2-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/cloudflare-r2-domain-security.yml
- type: Authentication
  url: authentication/cloudflare-r2-authentication.yml
- type: Website
  url: https://www.cloudflare.com/developer-platform/products/r2/
- type: Documentation
  url: https://developers.cloudflare.com/r2/
- type: GitHubOrg
  url: https://github.com/cloudflare
- type: GitHubRepo
  url: https://github.com/cloudflare/api-schemas
- type: LinkedIn
  url: https://www.linkedin.com/company/cloudflare
- type: Blog
  url: https://blog.cloudflare.com/tag/cloudflare-r2/
- type: Pricing
  url: https://developers.cloudflare.com/r2/pricing/
- type: StatusPage
  url: https://www.cloudflarestatus.com/
- type: X
  url: https://x.com/cloudflare
- type: Plans
  url: plans/cloudflare-r2-plans-pricing.yml
- type: RateLimits
  url: rate-limits/cloudflare-r2-rate-limits.yml
- type: FinOps
  url: finops/cloudflare-r2-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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