SeaweedFS

SeaweedFS is a distributed file system and S3-compatible object store, open source at github.com/seaweedfs/seaweedfs with an Enterprise edition sold at seaweedfs.com (data recovery, self-healing storage, erasure coding automation, point-in-time recovery, support plans). Its components - master, volume, filer, S3 gateway, IAM and message-queue broker - talk over published gRPC services (179 RPCs across 14 .proto files) alongside HTTP and S3 interfaces documented in the project wiki.

SeaweedFS is listed with 1 API on the APIs.io network. Tagged areas include Company, Object Storage, Distributed File System, S3 Compatible, and gRPC.

SeaweedFS’s developer surface includes documentation, getting-started guide, API reference, engineering blog, pricing, support, changelog, and 9 more developer resources.

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19.6/100 emerging ▼ -7.4 Agent 13/100 agent aware Heartbeat 100/100 alive Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →

1 API

Company Object StorageDistributed File SystemS3 Compatible gRPC Open Source Storage

Kin Score

Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0

Composite quality — 19.6/100 · emerging

Contract Quality 5.1 / 21

Developer Ergonomics 4.3 / 17

Access Clarity 1.8 / 17

Operational Transparency 1.2 / 11

Contract Governance 0.0 / 10

Discoverability 5.3 / 9

Regulatory Posture 1.2 / 15

Agent readiness — 13/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 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

Pagination 5 / 5

Distinct Operations 3 / 3

MCP Tool Quality 6 / 6

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
Stable Error Semantics +8 pts — OpenAPI $refs a shared error schema across 4xx/5xx responses (verified), else common[].type includes ErrorCatalog / ErrorCodes / DeclineCodes
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0

12 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 24.0 — up to +19.0 composite points
Access Clarity scores 10.5 — up to +17.9 composite points
Developer Ergonomics scores 25.0 — up to +15.0 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

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 the provider profile at artifacts.apis.io/seaweedfs/apis.yml: open an issue on github.com/api-evangelist/seaweedfs to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Markets this provider is in provisional

The Kin Score Market layer reads a provider inside its market: its position, and how deep its integrations go. Depth is only comparable within a position. Provisional and unweighted: not part of the Kin Score or agent readiness.

Market	Position	Depth	Registered MCP server	Declares compatibility
Artifact Hub Cloud-Native Packages	distribution	9.6 (thin)	-	-
Buf Schema Registry (public Protocol Buffers modules, gRPC / ConnectRPC schema publishers)	distribution	9.6 (thin)	-	-

Registered MCP server and declares compatibility are report only — not weighted. Undeclared means we found nothing we can read, so there is no number: we never infer integrations.

Standards implemented 1

Standards this provider implements or carries. De facto ones are profiled and measured by the API Commons; formal ones come from the standards directory and are linked by the provider's own tags. The evidence column says how each claim was established — not that it was made.

gRPC

tagged — the provider's own APIs.json carries the standard as a tag; implementation not verified

APIs 1

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

SeaweedFS gRPC API

gRPC services exposed by SeaweedFS cluster components (Seaweed master, VolumeServer, SeaweedFiler, SeaweedS3, SeaweedIdentityAccessManagement, SeaweedMessaging broker and agent,...

Security Posture 1

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

Seaweedfs Domain Security

TLSv1.3

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

GettingStarted

GettingStarted

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Build 4

SDKs, sample code, and the tooling you integrate with

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

SourceCode

SourceCode

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

Support

Support

ChangeLog

ChangeLog

Commercial 2

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: seaweedfs
name: SeaweedFS
description: SeaweedFS is a distributed file system and S3-compatible object store, open source at github.com/seaweedfs/seaweedfs
  with an Enterprise edition sold at seaweedfs.com (data recovery, self-healing storage, erasure coding automation, point-in-time
  recovery, support plans). Its components - master, volume, filer, S3 gateway, IAM and message-queue broker - talk over published
  gRPC services (179 RPCs across 14 .proto files) alongside HTTP and S3 interfaces documented in the project wiki.
url: https://raw.githubusercontent.com/api-evangelist/seaweedfs/refs/heads/main/apis.yml
x-type: company
x-source: harvest:market-gap:object-storage
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-13 (local-v5; was harvest)
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - security
  generated: '2026-11-06'
  method: derived
specificationVersion: '0.20'
created: '2026-10-13'
modified: '2026-10-13'
tags:
- Company
- Object Storage
- Distributed File System
- S3 Compatible
- gRPC
- Open Source
- Storage
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Hosts
  url: hosts/seaweedfs-hosts.yml
- type: Vendors
  url: vendors/seaweedfs-vendors.yml
- type: SDKs
  url: packages/seaweedfs-packages.yml
- type: Packages
  url: packages/seaweedfs-packages.yml
- type: DomainSecurity
  url: security/seaweedfs-domain-security.yml
- type: Website
  url: https://seaweedfs.com
- type: Documentation
  url: https://seaweedfs.com/docs/deploy/
- type: GettingStarted
  url: https://seaweedfs.com/docs/deploy/
- type: APIReference
  url: https://seaweedfs.com/docs/reference/ec_repair/
- type: Blog
  url: https://seaweedfs.com/blog/
- type: GitHubOrganization
  url: https://github.com/seaweedfs
- type: SourceCode
  url: https://github.com/seaweedfs/seaweedfs
- type: Pricing
  url: https://seaweedfs.com/docs/pricing/
- type: Support
  url: https://seaweedfs.com/docs/support/
- type: TermsOfService
  url: https://seaweedfs.com/docs/terms/
- type: ChangeLog
  url: https://github.com/seaweedfs/seaweedfs/releases
apis:
- aid: seaweedfs:seaweedfs-grpc
  name: SeaweedFS gRPC API
  description: 'gRPC services exposed by SeaweedFS cluster components (Seaweed master, VolumeServer, SeaweedFiler, SeaweedS3,
    SeaweedIdentityAccessManagement, SeaweedMessaging broker and agent, mount, worker and plugin services), published as .proto
    files in the seaweedfs/seaweedfs repository. The host is self-deployed: each cluster serves these on its own master/volume/filer
    gRPC ports.'
  humanURL: https://github.com/seaweedfs/seaweedfs/wiki
  baseURL: http://{your-filer-host}:8888
  tags:
  - gRPC
  - Object Storage
  - Distributed File System
  properties:
  - type: Protobuf
    url: grpc/seaweedfs-filer.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/filer.proto
  - type: Protobuf
    url: grpc/seaweedfs-volume_server.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/volume_server.proto
  - type: Protobuf
    url: grpc/seaweedfs-master.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/master.proto
  - type: Protobuf
    url: grpc/seaweedfs-s3.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/s3.proto
  - type: Protobuf
    url: grpc/seaweedfs-iam.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/iam.proto
  - type: Protobuf
    url: grpc/seaweedfs-mq_broker.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/mq_broker.proto
  - type: Protobuf
    url: grpc/seaweedfs-mq_agent.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/mq_agent.proto
  - type: Protobuf
    url: grpc/seaweedfs-mq_schema.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/mq_schema.proto
  - type: Protobuf
    url: grpc/seaweedfs-remote.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/remote.proto
  - type: Protobuf
    url: grpc/seaweedfs-s3_lifecycle.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/s3_lifecycle.proto
  - type: Protobuf
    url: grpc/seaweedfs-worker.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/worker.proto
  - type: Protobuf
    url: grpc/seaweedfs-plugin.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/plugin.proto
  - type: Protobuf
    url: grpc/seaweedfs-mount.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/mount.proto
  - type: Protobuf
    url: grpc/seaweedfs-mount_peer.proto
    source: https://github.com/seaweedfs/seaweedfs/blob/master/weed/pb/mount_peer.proto
  - type: Documentation
    url: https://github.com/seaweedfs/seaweedfs/wiki
  - type: Documentation
    name: Filer Server API
    url: https://github.com/seaweedfs/seaweedfs/wiki/Filer-Server-API
  - type: Documentation
    name: Master Server API
    url: https://github.com/seaweedfs/seaweedfs/wiki/Master-Server-API
  - type: Documentation
    name: Volume Server API
    url: https://github.com/seaweedfs/seaweedfs/wiki/Volume-Server-API
  - type: Documentation
    name: Amazon S3 API
    url: https://github.com/seaweedfs/seaweedfs/wiki/Amazon-S3-API
x-enrichment:
  date: '2026-10-13'
  status: enriched
  artifacts_added: 17
  pass: local-v5

SeaweedFS API — frequently asked questions

Does SeaweedFS have an API?

Yes. APIs.io lists 1 API from SeaweedFS, including SeaweedFS gRPC API.

Is the SeaweedFS API ready for AI agents?

SeaweedFS has a Kin Score of 19.6 out of 100 (emerging) and an Agent Readiness score of 12.9 (agent-aware), scored by API Evangelist on 2026-11-06.

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