# CubeFS

**Canonical:** https://apis.io/providers/cubefs/  
**Website:** https://cubefs.io/  
**APIs profiled:** 11

CubeFS is a CNCF graduated cloud-native distributed file system supporting POSIX, HDFS, and S3-compatible object storage protocols. It provides multi-tenancy, multi-AZ deployment, cross-region replication, and erasure coding for both hot and cold data tiers, and is widely used to back cloud-native AI training, big-data analytics, and container storage workloads.

## Kin Score — 39.3 / 100 (developing)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 39.3).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 59.4 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 39.5 |
| Developer Ergonomics | 33.3 |
| Commercial Clarity | 15.8 |
| Access Clarity | 15.8 |

## Agent readiness — 29.1 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (11)

- **CubeFS ACLs API** — Access control list operations for buckets and objects. Supports getting and setting ACLs to control access at the bucket and object level.
- **CubeFS Buckets API** — Bucket-level operations including creating, listing, and deleting buckets. In CubeFS, each S3 bucket corresponds to a CubeFS volume. Bucket names must be unique within the cluster.
- **CubeFS Cluster API** — Cluster-level operations including retrieving cluster status, topology, and freezing/unfreezing the cluster to control automatic partition creation.
- **CubeFS DataNodes API** — Data node management operations including listing nodes, querying node status, decommissioning nodes, and managing data partitions on nodes.
- **CubeFS DataPartitions API** — Data partition management including creating, loading, decommissioning, and diagnosing data partitions within volumes.
- **CubeFS MetaNodes API** — Metadata node management operations including listing nodes, querying node status, decommissioning nodes, and managing metadata partitions.
- **CubeFS MetaPartitions API** — Metadata partition management including creating, loading, and decommissioning metadata partitions within volumes.
- **CubeFS Multipart API** — Multipart upload operations for uploading large objects in parts. Supports initiating, uploading parts, listing parts, completing, and aborting multipart uploads.
- **CubeFS Objects API** — Object CRUD operations including uploading, downloading, copying, listing, and deleting objects. Supports both standard single-part uploads and multipart uploads for large objects.
- **CubeFS Users API** — User and access control management for CubeFS multi-tenancy. Users own volumes and are assigned access keys and secret keys for S3-compatible object storage operations.
- **CubeFS Volumes API** — Volume lifecycle management operations including creating, updating, expanding, shrinking, and deleting volumes. Volumes are the top-level storage namespaces in CubeFS.

## Agentic access (1)

- **Cubefs Agentic Access** — 39 operations · 11 acting

## Security (2)

- **Cubefs Authentication** — apiKey · 1 scheme
- **Cubefs Domain Security** — TLSv1.3

## Plans (1)

- **Cubefs Plans Pricing**

## Tags

Cloud-Native, CNCF Graduated, Distributed File System, Kubernetes, Object Storage, POSIX, S3 Compatible, Storage

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/cubefs/). Scores are computed from the provider's own public artifacts under a published rubric.