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.
Limited machine-readable signal and partial portal coverage — documentation a human can read, but little a machine or agent can consume without scraping.
API Evangelist profiles The Companies API the way a machine reads it — 18 machine-readable artifacts across 12 APIs, pulled from the provider's own public surface and indexed so a developer, an analyst, or an AI agent can evaluate it against every other provider on the network.
Every provider in the network is reduced to the same set of machine-readable artifacts — OpenAPI contracts, event specifications, GraphQL schemas, runnable collections, pricing and rate-limit signals, security posture, OAuth scopes, and the agent surfaces (MCP servers and skills) that let software drive the API on its own. We profile them because the interface is the part of a company you can actually inspect: it is a truer signal of what a provider does than any marketing page. From those artifacts we compute the Kin Score — The Companies API scores 40.0/100 (thin), with a separate agent-readiness read of 48/100 (agent ready). The full breakdown is below, followed by every artifact we hold — each card links through to its machine-readable definition on apis.io.
Kin Score
This is the API Evangelist rating — a single, repeatable read computed from the artifacts on this page. Green fill is points earned; the red track is points possible, so every bar shows earned-versus-possible at a glance.
Kin Score
How this is scored →scored 2026-07-27 · rubric v0.5
How we profile The Companies API
Each block below is one kind of artifact we hold for The Companies API. For each we say what it is and why it earns a place in the profile, then list every one we've indexed — capped at two rows, scroll within the panel for the rest.
APIs 12
Each API is captured as its own OpenAPI definition — every operation, parameter, and response. This is the single most useful machine-readable description of what an API does, and it's what lets us score, lint, mock, and generate against it without asking the provider for anything.
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 within the panel for all 12 ·
Open Collections 1
Open, tool-agnostic collections carry the same runnable value as Postman without locking you to one client — the portable, forkable form of the same exercise.
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
The Companies API
OPEN COLLECTIONPricing Plans 1
Pricing is part of the interface. Machine-readable plans tell you what a tier costs and includes before you commit — one of the six things the Kin Score reads for commercial clarity.
Published pricing tiers and plan structures.
Rate Limits 1
Rate limits are the difference between a demo that works and a production integration that doesn't fall over. Publishing them is an operational-transparency signal — and a hard requirement for any agent that plans its own throughput.
Documented rate limits and quota policies.
Thecompaniesapi Rate Limits
RATE LIMITSFinOps 1
Cost, billing, and metering signals let a buyer model the financial operations of an API before it's live. We profile them for the same reason we profile pricing: the money is part of the contract.
Cost, billing, and metering signals for API financial operations.
Thecompaniesapi Finops
FINOPSSecurity Posture 1
Authentication, domain security, vulnerability disclosure, and trust-center signals — the evidence that a provider takes security seriously enough to document it. We profile it because you can't govern what you can't see.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Agentic Access 1
An x-agentic-access contract marks which operations are safe for an agent to run on its own and which need a human in the loop. It is the difference between an API an agent can use and one it can use safely.
Recommended x-agentic-access execution contracts for AI agents.
Resources
Every other property we hold for The Companies API — documentation, portals, status pages, policies, and corporate surface — grouped by the job it does, following the integrator's arc from getting started to running in production.
Documentation 1
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 1
SDKs, sample code, and the tooling you integrate with
Access & Security 1
Authentication, authorization, and security posture
Operate 1
Status, limits, changes, and where to get help
Commercial 2
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
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