Clojars

Clojars is a community repository for open source Clojure libraries, providing a REST API for searching artifacts, retrieving version information, accessing user and group data, and managing deployment credentials via deploy tokens.

Clojars publishes 5 APIs on the APIs.io network, including Artifacts API, Feeds API, Groups API, and 2 more. Tagged areas include Clojure, Package Registry, Artifact Repository, and Open-Source.

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

Clojars’ developer surface includes authentication and 10 more developer resources.

🌐 Visit website 📡 Source on GitHub

34.7/100 thin ▬ flat Agent 26/100 agent aware self hosted · EPL-1.0 Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

1 APIs

ClojurePackage Registry Artifact Repository Open-Source

Kin Score

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

Composite quality — 34.7/100 · thin

Contract Quality 14.7 / 25

Developer Ergonomics 4.3 / 20

Access Clarity 1.6 / 20

Operational Transparency 6.8 / 13

Contract Governance 1.2 / 12

Discoverability 6.1 / 10

Agent readiness — 26/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

Documented Reversibility 6 / 6

MCP Server 0 / 12

Machine-Readable Auth 10 / 10

Idempotency 9 / 9

Stable Error Semantics 0 / 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 4 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics does not apply to this provider. The published contracts declare no write operations, and a read-only API cannot create-or-update. The facet is excluded from this provider's denominator entirely — not scored zero. A reference or data API is not deficient for being unable to upsert.

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/clojars: 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 5

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

Clojars Artifacts API

Operations related to Clojars artifacts and releases

Clojars Feeds API

Release feed and bulk data operations

Clojars Groups API

Operations related to Clojars artifact groups

Clojars Search API

Search operations across the Clojars artifact index

Clojars Users API

Operations related to Clojars user profiles and group memberships

Open Collections 6

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

API Collection

OPEN COLLECTION

Clojars REST Artifacts API

OPEN COLLECTION

Clojars REST Artifacts Feeds API

OPEN COLLECTION

Clojars REST Artifacts Groups API

OPEN COLLECTION

Clojars REST Artifacts Search API

OPEN COLLECTION

Clojars REST Artifacts Users API

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Free

0 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Default

4 limits

RATE LIMITS

FinOps 1

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

Overview

FINOPS

Semantic Vocabularies 1

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

context Context

0 classes · 17 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

Clojars API Rules

6 rules · 5 warnings 1 info

SPECTRAL

JSON Schema 3

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

Artifact

9 properties

JSON SCHEMA

ReleaseFeed

2 properties

JSON SCHEMA

User

2 properties

JSON SCHEMA

Examples 4

Example request and response payloads for these APIs.

Get Artifact By Group

9 fields

EXAMPLE

Get Release Feed

2 fields

EXAMPLE

Get User

2 fields

EXAMPLE

Search Artifacts

2 fields

EXAMPLE

Security Posture 2

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

Clojars Authentication

http · 1 scheme

SECURITY

Clojars Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Agentic Access 1

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

Clojars Agentic Access

9 operations

9 operations · 0 acting

AGENTIC

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Build 2

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

GitHubRepo

GitHubRepo

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Operate 2

Status, limits, changes, and where to get help

IssueTracker

IssueTracker

StatusPage

StatusPage

Commercial 1

Pricing, plans, and the legal terms of use

License

License

Other 3

Properties that don't map to a standard resource type

Wiki

Wiki

MavenRepository

MavenRepository

Sponsor

Sponsor

Source (apis.yml)

name: Clojars
description: Clojars is a community repository for open source Clojure libraries, providing a REST API for searching artifacts,
  retrieving version information, accessing user and group data, and managing deployment credentials via deploy tokens.
deliveryModel:
  model: self-hosted
  license: EPL-1.0
  open_source: true
  commercial: false
  callable_host: true
  label: Self-hosted open source · you run it yourself
  confidence: high
  source:
  - license
  - openapi
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  generated: '2026-09-03'
  method: derived
image: https://clojars.org/images/clojars-logo.png
url: https://clojars.org/
tags:
- Clojure
- Package Registry
- Artifact Repository
- Open-Source
tags_raw:
- Clojure
- Package Registry
- Artifact Repository
- Open Source
created: '2026-06-13'
modified: '2026-06-13'
specificationVersion: '0.23'
apis:
- aid: clojars:clojars-artifacts-api
  name: Clojars Artifacts API
  description: Operations related to Clojars artifacts and releases
  humanURL: https://github.com/clojars/clojars-web/wiki/Data
  baseURL: https://clojars.org/api
  tags:
  - Artifacts
  properties:
  - type: OpenAPI
    url: openapi/clojars-artifacts-api-openapi.yml
  - type: Documentation
    url: https://github.com/clojars/clojars-web/wiki/Data
  - type: Authentication
    url: https://github.com/clojars/clojars-web/wiki/Deploy-Tokens
- aid: clojars:clojars-feeds-api
  name: Clojars Feeds API
  description: Release feed and bulk data operations
  humanURL: https://github.com/clojars/clojars-web/wiki/Data
  baseURL: https://clojars.org/api
  tags:
  - Feeds
  properties:
  - type: OpenAPI
    url: openapi/clojars-feeds-api-openapi.yml
  - type: Documentation
    url: https://github.com/clojars/clojars-web/wiki/Data
  - type: Authentication
    url: https://github.com/clojars/clojars-web/wiki/Deploy-Tokens
- aid: clojars:clojars-groups-api
  name: Clojars Groups API
  description: Operations related to Clojars artifact groups
  humanURL: https://github.com/clojars/clojars-web/wiki/Data
  baseURL: https://clojars.org/api
  tags:
  - Group
  tags_raw:
  - Groups
  properties:
  - type: OpenAPI
    url: openapi/clojars-groups-api-openapi.yml
  - type: Documentation
    url: https://github.com/clojars/clojars-web/wiki/Data
  - type: Authentication
    url: https://github.com/clojars/clojars-web/wiki/Deploy-Tokens
- aid: clojars:clojars-search-api
  name: Clojars Search API
  description: Search operations across the Clojars artifact index
  humanURL: https://github.com/clojars/clojars-web/wiki/Data
  baseURL: https://clojars.org/api
  tags:
  - Search
  properties:
  - type: OpenAPI
    url: openapi/clojars-search-api-openapi.yml
  - type: Documentation
    url: https://github.com/clojars/clojars-web/wiki/Data
  - type: Authentication
    url: https://github.com/clojars/clojars-web/wiki/Deploy-Tokens
- aid: clojars:clojars-users-api
  name: Clojars Users API
  description: Operations related to Clojars user profiles and group memberships
  humanURL: https://github.com/clojars/clojars-web/wiki/Data
  baseURL: https://clojars.org/api
  tags:
  - User
  tags_raw:
  - Users
  properties:
  - type: OpenAPI
    url: openapi/clojars-users-api-openapi.yml
  - type: Documentation
    url: https://github.com/clojars/clojars-web/wiki/Data
  - type: Authentication
    url: https://github.com/clojars/clojars-web/wiki/Deploy-Tokens
common:
- type: IssueTracker
  url: https://github.com/clojars/clojars-web/issues
- type: License
  name: EPL-1.0
  url: https://github.com/clojars/clojars-web/blob/main/LICENSE
- type: AgenticAccess
  url: agentic-access/clojars-agentic-access.yml
- type: DomainSecurity
  url: security/clojars-domain-security.yml
- type: Authentication
  url: authentication/clojars-authentication.yml
- type: StatusPage
  url: https://clojars.statuspage.io
- type: GitHubOrg
  url: https://github.com/clojars
- type: GitHubRepo
  url: https://github.com/clojars/clojars-web
- type: Wiki
  url: https://github.com/clojars/clojars-web/wiki
- type: MavenRepository
  url: https://repo.clojars.org
- type: Sponsor
  url: https://www.clojuriststogether.org/
maintainers:
- FN: Clojurists Together
  url: https://www.clojuriststogether.org/

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