OpenCorporates

OpenCorporates is the world's largest open database of companies, providing a REST API for searching and retrieving company registration data, officer information, and corporate filings globally across more than 140 jurisdictions. The API enables access to company details, director and officer records, statutory filings, and corporate groupings, making it a primary resource for compliance, due diligence, investigative journalism, and corporate transparency.

OpenCorporates publishes 1 API on the APIs.io network. Tagged areas include Companies, Corporate Data, Business Intelligence, Compliance, and Due Diligence.

OpenCorporates’ developer surface includes documentation, engineering blog, pricing, and 9 more developer resources.

🌐 Visit website 📡 Source on GitHub

30.5/100 thin ▬ flat Agent 19/100 agent aware Full breakdown ↓
scored 2026-08-05 · rubric v0.9.1

AccessFreemium

1 APIs

CompaniesCorporate DataBusiness IntelligenceComplianceDue DiligenceOfficersFilingsCorporate TransparencyOpen Data

Kin Score

Kin Score How this is scored →
scored 2026-08-05 · rubric v0.9.1

Composite quality — 30.5/100 · thin

Contract Quality 8.1 / 25

Developer Ergonomics 2.2 / 20

Commercial Clarity 10.0 / 20

Operational Transparency 6.8 / 13

Governance 0.0 / 12

Discoverability 6.9 / 10

Agent readiness — 19/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

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 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

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/open-corporates: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

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

Rate Limits 1

Documented rate limits and quota policies.

Open Corporates Rate Limits

9 limits

RATE LIMITS

FinOps 1

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

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrg

GitHubOrg

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

StatusPage

StatusPage

RateLimits

RateLimits

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

Plans

Plans

FinOps

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: open-corporates
name: OpenCorporates
description: OpenCorporates is the world's largest open database of companies, providing a REST API for searching and retrieving
  company registration data, officer information, and corporate filings globally across more than 140 jurisdictions. The API
  enables access to company details, director and officer records, statutory filings, and corporate groupings, making it a
  primary resource for compliance, due diligence, investigative journalism, and corporate transparency.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/open-corporates.png
url: https://raw.githubusercontent.com/api-evangelist/open-corporates/refs/heads/main/apis.yml
created: 2026-06-13
modified: 2026-06-13
specificationVersion: '0.19'
tags:
- Companies
- Corporate Data
- Business Intelligence
- Compliance
- Due Diligence
- Officers
- Filings
- Corporate Transparency
- Open Data
apis:
- aid: open-corporates:open-corporates-api
  name: OpenCorporates API
  description: REST API providing access to the world's largest open database of companies. Search and retrieve company registration
    data, officer information, corporate filings, and jurisdiction data across more than 140 jurisdictions globally.
  image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/apis-json-logo.jpg
  humanURL: https://opencorporates.com
  baseURL: https://api.opencorporates.com/v0.4
  tags:
  - Companies
  - Officers
  - Filings
  - Corporate Data
  properties:
  - type: Documentation
    url: https://api.opencorporates.com/documentation/API-Reference
  - type: OpenAPI
    url: https://api.opencorporates.com/documentation/API-Reference
  contact:
  - FN: OpenCorporates API Support
    email: api@opencorporates.com
    url: https://opencorporates.com/contact
common:
- type: DomainSecurity
  url: security/open-corporates-domain-security.yml
- type: Website
  url: https://opencorporates.com
- type: Documentation
  url: https://api.opencorporates.com/documentation/API-Reference
- type: GitHubOrg
  url: https://github.com/openc
- type: LinkedIn
  url: https://www.linkedin.com/company/opencorporates
- type: Blog
  url: https://blog.opencorporates.com
- type: Pricing
  url: https://opencorporates.com/pricing/
- type: StatusPage
  url: https://status.opencorporates.com/
- type: X
  url: https://twitter.com/opencorporates
- type: Plans
  url: plans/open-corporates-plans-pricing.yml
- type: RateLimits
  url: rate-limits/open-corporates-rate-limits.yml
- type: FinOps
  url: finops/open-corporates-finops.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

OpenCorporates

Kin Score

APIs 1

OpenCorporates API

Pricing Plans 1

Open Corporates Plans Pricing