Ohloh

aid: ohloh
name: Ohloh
description: Ohloh is the open source directory and analytics service that was rebranded as Black Duck Open Hub (openhub.net)
  after Black Duck Software acquired it. It tracks hundreds of thousands of open source projects, their code, contributors,
  languages, licenses and activity, and exposes this data through a public REST API. The Open Hub / Ohloh API returns XML,
  authenticates with an api_key HTTP parameter (plus OAuth 2.0 for write access and private account data), is rate limited
  to 1,000 requests per key per day, and covers resources such as projects, accounts, organizations, analyses, languages,
  stacks, factoids and contributor facts. This profile was added to the API Evangelist network as a stub and enriched from
  the provider's public documentation.
url: https://raw.githubusercontent.com/api-evangelist/ohloh/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://avatars.githubusercontent.com/blackducksoftware
x-type: company
x-source: vc-portfolio
x-backed-by:
- uncork-capital
x-tier: profile
x-tier-reason: enriched-from-docs
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Open-Source
- Open Source Directory
- Code Analytics
- Software Composition
- Developer Data
- Project
- Contributors
- Black Duck
tags_raw:
- Company
- Open Source
- Open Source Directory
- Code Analytics
- Software Composition
- Developer Data
- Projects
- Contributors
- Black Duck
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
apis:
- aid: ohloh:open-hub-api
  name: Open Hub API (Ohloh)
  humanURL: https://github.com/blackducksoftware/ohloh_api
  baseURL: https://www.openhub.net
  description: The REST API for Black Duck Open Hub (formerly Ohloh). Returns XML wrapped in a <response> root element that
    always carries a <status> (success/failed) and an <error> on failure. Requests append .xml to a resource URL and pass
    the api_key HTTP parameter; write operations and private account data use OAuth 2.0. Collections return at most 25 items
    per page (page parameter, one-based; query and sort parameters) and report items_returned, items_available and first_item_position.
    Resources include projects, accounts, organizations, analyses, languages, stacks, factoids, kudos, positions and contributor
    facts.
  tags:
  - Open-Source
  - Project
  - Contributors
  - Code Analytics
  tags_raw:
  - Open Source
  - Projects
  - Contributors
  - Code Analytics
  properties:
  - type: Documentation
    url: https://github.com/blackducksoftware/ohloh_api
  - type: APIReference
    url: https://github.com/blackducksoftware/ohloh_api/tree/master/reference
  - type: Authentication
    url: authentication/ohloh-authentication.yml
  - type: Conventions
    url: conventions/ohloh-conventions.yml
  - type: RateLimits
    url: rate-limits/ohloh-rate-limits.yml
common:
- type: DomainSecurity
  url: security/ohloh-domain-security.yml
- type: Website
  url: https://www.openhub.net
- type: DeveloperPortal
  url: https://github.com/blackducksoftware/ohloh_api
- type: Documentation
  url: https://github.com/blackducksoftware/ohloh_api
- type: APIReference
  url: https://github.com/blackducksoftware/ohloh_api/tree/master/reference
- type: GettingStarted
  url: https://github.com/blackducksoftware/ohloh_api/blob/master/README.md
- type: GitHubOrganization
  url: https://github.com/blackducksoftware
- type: SignUp
  url: https://www.openhub.net/accounts/me/api_keys/new
- type: TermsOfService
  url: https://community.blackduck.com/s/article/Black-Duck-Open-Hub-API-Use-Agreement
- type: Authentication
  url: authentication/ohloh-authentication.yml
- type: Conventions
  url: conventions/ohloh-conventions.yml
- type: RateLimits
  url: rate-limits/ohloh-rate-limits.yml
- type: Conformance
  url: conformance/ohloh-conformance.yml
- type: X-MCPServerCandidate
  url: mcp/ohloh-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- type: WellKnown
  url: well-known/ohloh-well-known.yml
- type: LLMsTxt
  url: llms/ohloh-llms.txt
x-enrichment:
  date: '2026-07-20'
  status: enriched
  artifacts_added: 8
  pass: local-v1
rate_limits:
- name: Open Hub API default
  limit_count: 1000
  interval: day
  scope: api_key
  source: https://github.com/blackducksoftware/ohloh_api/blob/master/README.md