The Companies API website screenshot

The Companies API

The Companies API is a company data and enrichment platform offering programmatic access to firmographic, technographic, and web-intelligence data on 50M+ companies. Its REST API (base https://api.thecompaniesapi.com, all resources under /v2) covers company search and segmentation, company enrichment by domain, email, or social profile, similar-company lookup, industry and technology reference data, location reference data, saved lists, and asynchronous bulk actions. Requests are authenticated with an API token passed in the Authorization header, billing is credit-based, and the full OpenAPI 3.1 description is published at /v2/openapi.

The Companies API publishes 12 API contracts indexed on the APIs.io network, including Actions API, Analytics API, Companies API, and 9 more. Tagged areas include Company Data, Data Enrichment, Firmographics, Web Intelligence, and B2B Data.

The The Companies API catalog on APIs.io includes 1 event-driven AsyncAPI specification and 1 Spectral governance ruleset.

The Companies API’s developer surface includes authentication, documentation, changelog, API reference, getting-started guide, support, pricing, and 27 more developer resources.

67.7/100 exemplar ▬ flat Agent 28/100 agent aware Front door AI 3/6 light Heartbeat 17/100 dormant saas Full breakdown ↓
scored 2026-11-06 · rubric v0.27.0 · Show this score on your site →
AccessPaid
1 published contract 4 Agent Skills
Company DataData EnrichmentFirmographicsWeb IntelligenceB2B DataReference DataCompany Search

What this lets a business do 1

Business capabilities this provider's published APIs can perform, derived from its own contracts. Browse all capabilities →

Data & Reference Information Services
AE-230
AnalyticsCompanies
GET /v2/companies GET /v2/companies/{domain} GET /v2/companies/similar GET /v2/companies/by-email

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-11-06 · rubric v0.27.0
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 applies to this provider. This API accepts writes, so it carries 10 points of the composite. It is scored from the published contracts themselves: whether a caller can create-or-update in one call, whether the write accepts a key the caller already holds, and whether the response says which branch ran. Without that, every write needs a search-and-branch in front of it, and the first time that check is skipped a duplicate record is created. Scored against the observed mean rather than raw — a provider at the catalog average is unchanged by this facet, not penalised by it.
The six quality facets above are damped to 75 points between them, because the conditional facet above carries the other 25. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 75% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.
Show this score on your site. Kin Score badge preview for The Companies API It updates itself when the score changes. Paste this where you link to your API docs:
<a href="https://apis.io/providers/thecompaniesapi/"><img src="https://apis.io/badge/thecompaniesapi/card.svg" alt="The Companies API on APIs.io — Kin Score by API Evangelist"></a>
Other styles, a README pill and a shields.io endpoint are on the badge page.
Raise your score.
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
  • 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)
  • A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
  • Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link
  • Registration Without a Human +6 pts — a `registration_endpoint` in the served RFC 8414 / OIDC discovery document
  • Delegated User Identity +6 pts — a served discovery document listing authorization_code in grant_types_supported (served), else an oauth2 authorizationCode flow or openIdConnect declared in an OpenAPI (documented)
7 more unmet checks in the Agent Readiness table above.
Kin Score — facets with the most composite points still available (weight × headroom):
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/thecompaniesapi/apis.yml: open an issue on github.com/api-evangelist/thecompaniesapi 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.

MarketPositionDepthRegistered MCP serverDeclares compatibility
Official SDKs on Packagist, pub.dev and Hex distribution 28.7 - -

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.

measured — observed by APIs.io (published)

APIs 12

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

The Companies API Actions API

The actions API from The Companies API — 2 operation(s) for actions.

The Companies API Analytics API

The analytics API from The Companies API — 2 operation(s) for analytics.

The Companies API Companies API

The companies API from The Companies API — 13 operation(s) for companies.

The Companies API Industries API

The industries API from The Companies API — 2 operation(s) for industries.

The Companies API Job Titles API

The job-titles API from The Companies API — 1 operation(s) for job-titles.

The Companies API Lists API

The lists API from The Companies API — 5 operation(s) for lists.

The Companies API Locations API

The locations API from The Companies API — 5 operation(s) for locations.

The Companies API Prompts API

The prompts API from The Companies API — 4 operation(s) for prompts.

The Companies API Teams API

The teams API from The Companies API — 1 operation(s) for teams.

The Companies API Technologies API

The technologies API from The Companies API — 1 operation(s) for technologies.

The Companies API Users API

The users API from The Companies API — 1 operation(s) for users.

The Companies API Utilities API

The utilities API from The Companies API — 2 operation(s) for utilities.

Scroll for all 12

Open Collections 13

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

The Companies actions API

OPEN COLLECTION

The actions companies API

OPEN COLLECTION

The Companies API

OPEN COLLECTION

Scroll for all 13

Agent Skills 4

Packaged agent skills for driving this provider's APIs from an AI assistant.

The Companies API pricing

Prices published by The Companies API, read 2026-10-28 from www.thecompaniesapi.com/pricing.

PlanPrice
Startup $95/ month
Includes: 50000 credits per month
Scaleup $295/ month
Includes: 250000 credits per month
Enterprise $595/ month
Includes: 500000 credits per month

Plan details, limits and sources →

Rate limits

All 5 limits →

Billed by: credits · FinOps profile →

Pricing Plans 2

Published pricing tiers and plan structures.

Rate Limits 1

Documented rate limits and quota policies.

Thecompaniesapi Rate Limits

5 limits

RATE LIMITS

Service Levels 1

Uptime the provider promises or reports, as SLA4OAI. Read from its own pages; APIs.io runs no monitors.

FinOps 1

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

Event Specifications 1

AsyncAPI definitions for this provider's event-driven and streaming APIs.

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

The Companies API API Rules

70 rules · 62 errors 7 warnings 1 info

SPECTRAL

OpenAPI Overlays 12

Overlays applied on top of this provider's contracts. Each card says who wrote it: a document the provider publishes, or one API Evangelist derived or generated.

Thecompaniesapi Actions Api Overlay

5 actions · update · thecompaniesapi-actions-api-openapi.yml

DERIVED

Thecompaniesapi Analytics Api Overlay

5 actions · update · thecompaniesapi-analytics-api-openapi.yml

DERIVED

Thecompaniesapi Companies Api Overlay

5 actions · update · thecompaniesapi-companies-api-openapi.yml

DERIVED

Thecompaniesapi Industries Api Overlay

5 actions · update · thecompaniesapi-industries-api-openapi.yml

DERIVED

Thecompaniesapi Job Titles Api Overlay

5 actions · update · thecompaniesapi-job-titles-api-openapi.yml

DERIVED

Thecompaniesapi Lists Api Overlay

5 actions · update · thecompaniesapi-lists-api-openapi.yml

DERIVED

Thecompaniesapi Locations Api Overlay

5 actions · update · thecompaniesapi-locations-api-openapi.yml

DERIVED

Thecompaniesapi Prompts Api Overlay

5 actions · update · thecompaniesapi-prompts-api-openapi.yml

DERIVED

Thecompaniesapi Teams Api Overlay

5 actions · update · thecompaniesapi-teams-api-openapi.yml

DERIVED

Thecompaniesapi Technologies Api Overlay

5 actions · update · thecompaniesapi-technologies-api-openapi.yml

DERIVED

Thecompaniesapi Users Api Overlay

5 actions · update · thecompaniesapi-users-api-openapi.yml

DERIVED

Thecompaniesapi Utilities Api Overlay

5 actions · update · thecompaniesapi-utilities-api-openapi.yml

DERIVED

Scroll for all 12

Security Posture 2

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

Thecompaniesapi Authentication

apiKey · 1 scheme

SECURITY

Thecompaniesapi Domain Security

TLSv1.3 · DMARC

SECURITY

Agentic Access 1

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

Thecompaniesapi Agentic Access

46 operations · 13 acting

46 operations · 13 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

Documentation 2

Reference material describing how the API behaves

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Build 4

SDKs, sample code, and the tooling you integrate with

Access & Security 2

Authentication, authorization, and security posture

Operate 6

Status, limits, changes, and where to get help

Commercial 5

Pricing, plans, and the legal terms of use

Company 2

The organization behind the API

Other 1

Properties that don't map to a standard resource type

Source (apis.yml)

apis.yml Raw ↑
aid: thecompaniesapi
url: https://raw.githubusercontent.com/api-evangelist/thecompaniesapi/refs/heads/main/apis.yml
name: The Companies API
kind: company
description: The Companies API is a company data and enrichment platform offering programmatic access to firmographic, technographic,
  and web-intelligence data on 50M+ companies. Its REST API (base https://api.thecompaniesapi.com, all resources under /v2)
  covers company search and segmentation, company enrichment by domain, email, or social profile, similar-company lookup,
  industry and technology reference data, location reference data, saved lists, and asynchronous bulk actions. Requests are
  authenticated with an API token passed in the Authorization header, billing is credit-based, and the full OpenAPI 3.1 description
  is published at /v2/openapi.
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: medium
  source:
  - plans
  - authentication
  - security
  generated: '2026-11-06'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/thecompaniesapi.png
tags:
- Company Data
- Data Enrichment
- Firmographics
- Web Intelligence
- B2B Data
- Reference Data
- Company Search
created: '2026-07-11'
modified: '2026-08-14'
specificationVersion: '0.23'
apis:
- aid: thecompaniesapi:thecompaniesapi-actions-api
  name: The Companies API Actions API
  description: The actions API from The Companies API — 2 operation(s) for actions.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Actions
  tags_raw:
  - actions
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-actions-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-actions-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-analytics-api
  name: The Companies API Analytics API
  description: The analytics API from The Companies API — 2 operation(s) for analytics.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Analytics
  tags_raw:
  - analytics
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-analytics-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-analytics-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-companies-api
  name: The Companies API Companies API
  description: The companies API from The Companies API — 13 operation(s) for companies.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Companies
  tags_raw:
  - companies
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-companies-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-companies-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-industries-api
  name: The Companies API Industries API
  description: The industries API from The Companies API — 2 operation(s) for industries.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Industries
  tags_raw:
  - industries
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-industries-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-industries-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-job-titles-api
  name: The Companies API Job Titles API
  description: The job-titles API from The Companies API — 1 operation(s) for job-titles.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Job Titles
  tags_raw:
  - job-titles
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-job-titles-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-job-titles-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-lists-api
  name: The Companies API Lists API
  description: The lists API from The Companies API — 5 operation(s) for lists.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - List
  tags_raw:
  - lists
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-lists-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-lists-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-locations-api
  name: The Companies API Locations API
  description: The locations API from The Companies API — 5 operation(s) for locations.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Location
  tags_raw:
  - locations
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-locations-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-locations-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-prompts-api
  name: The Companies API Prompts API
  description: The prompts API from The Companies API — 4 operation(s) for prompts.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Prompts
  tags_raw:
  - prompts
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-prompts-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-prompts-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-teams-api
  name: The Companies API Teams API
  description: The teams API from The Companies API — 1 operation(s) for teams.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Team
  tags_raw:
  - teams
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-teams-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-teams-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-technologies-api
  name: The Companies API Technologies API
  description: The technologies API from The Companies API — 1 operation(s) for technologies.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - technologies
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-technologies-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-technologies-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-users-api
  name: The Companies API Users API
  description: The users API from The Companies API — 1 operation(s) for users.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - User
  tags_raw:
  - users
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-users-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-users-api-overlay.yaml
- aid: thecompaniesapi:thecompaniesapi-utilities-api
  name: The Companies API Utilities API
  description: The utilities API from The Companies API — 2 operation(s) for utilities.
  humanURL: https://www.thecompaniesapi.com/api
  baseURL: https://api.thecompaniesapi.com/v2
  tags:
  - Utilities
  tags_raw:
  - utilities
  properties:
  - type: OpenAPI
    url: openapi/thecompaniesapi-utilities-api-openapi.yml
  - type: Documentation
    url: https://www.thecompaniesapi.com/api
  - type: APIReference
    url: https://www.thecompaniesapi.com/api
  - type: Overlay
    url: overlays/thecompaniesapi-utilities-api-overlay.yaml
common:
- type: CapabilityMap
  url: capabilities/thecompaniesapi-capability-edges.yml
  name: The Companies API Business Capability Map
- type: DomainSecurity
  url: security/thecompaniesapi-domain-security.yml
- type: AgenticAccess
  url: agentic-access/thecompaniesapi-agentic-access.yml
- type: Authentication
  url: authentication/thecompaniesapi-authentication.yml
- type: GitHubOrganization
  url: https://github.com/thecompaniesapi
- type: LinkedIn
  url: https://www.linkedin.com/company/thecompaniesapi
- type: Website
  url: https://www.thecompaniesapi.com
- type: Documentation
  url: https://www.thecompaniesapi.com/api
- type: Plans
  url: plans/thecompaniesapi-plans-pricing.yml
- type: RateLimits
  url: rate-limits/thecompaniesapi-rate-limits.yml
- type: FinOps
  url: finops/thecompaniesapi-finops.yml
- type: Packages
  url: packages/thecompaniesapi-packages.yml
- type: SDKs
  url: packages/thecompaniesapi-packages.yml
- type: LLMsTxt
  url: llms/thecompaniesapi-llms.txt
- type: Conformance
  url: conformance/thecompaniesapi-conformance.yml
- type: ErrorCatalog
  url: errors/thecompaniesapi-problem-types.yml
- type: Lifecycle
  url: lifecycle/thecompaniesapi-lifecycle.yml
- type: StatusPage
  url: https://status.thecompaniesapi.com/en/
- type: Conventions
  url: conventions/thecompaniesapi-conventions.yml
- type: ChangeLog
  url: changelog/thecompaniesapi-changelog.yml
- type: DataModel
  url: data-model/thecompaniesapi-data-model.yml
- type: Webhooks
  url: asyncapi/thecompaniesapi-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Roadmap
  url: https://updates.thecompaniesapi.com/roadmap
- type: DeveloperPortal
  url: https://www.thecompaniesapi.com/api
- type: APIReference
  url: https://www.thecompaniesapi.com/api
- type: GettingStarted
  url: https://www.thecompaniesapi.com/api
- type: Support
  url: mailto:support@thecompaniesapi.com
- type: HelpCenter
  url: https://www.thecompaniesapi.com/product/faq
- type: Pricing
  url: https://www.thecompaniesapi.com/pricing
- type: Login
  url: https://www.thecompaniesapi.com/auth/login
- type: TermsOfService
  url: https://www.thecompaniesapi.com/product/terms
- type: PrivacyPolicy
  url: https://www.thecompaniesapi.com/product/privacy
- type: Collection
  url: collections/thecompaniesapi.opencollection.json
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-enrichment:
  date: '2026-08-14'
  status: enriched
  artifacts_added: 30
  pass: local-v1

The Companies API — frequently asked questions

Does The Companies API have an API?

Yes. APIs.io lists 12 APIs from The Companies API, including The Companies API Actions API, The Companies API Analytics API and The Companies API Companies API, and 9 more.

Is there an OpenAPI specification for the The Companies API?

Yes. APIs.io indexes 12 OpenAPI specifications for The Companies API, each linked for download from this page.

How do I authenticate with the The Companies API?

The Companies API uses bearer-token authentication (apiKey · 1 scheme). The details are profiled on APIs.io as Thecompaniesapi Authentication.

How much does the The Companies API cost?

The Companies API publishes its prices; its Startup plan is $95/ month as of 2026-10-28. APIs.io lists 3 pricing plans for The Companies API, with each plan's price, limits and inclusions under Pricing on this page.

Is the The Companies API ready for AI agents?

The Companies API has a Kin Score of 67.7 out of 100 (exemplar) and an Agent Readiness score of 28.4 (agent-aware), scored by API Evangelist on 2026-11-06.

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