ContactOut
ContactOut is a B2B email finder and professional contact data platform (ContactOut Pty Ltd, founded 2015, San Francisco) that provides verified personal and work emails, phone numbers and enriched people and company profiles for 350M professionals across 40M companies, delivered through a Chrome extension, search portal, bulk tools, a REST API at api.contactout.com and a hosted MCP server at contactout.com/mcp. Used by recruiters and sales teams; GDPR and CCPA compliant with a published opt-out, and intended for professional B2B use only.
Real signal across most facets with visible, nameable gaps — the contract exists but is thin, or the portal is good while governance and commercial terms are absent.
API Evangelist profiles ContactOut the way a machine reads it — 30 machine-readable artifacts across 15 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 — ContactOut scores 53.5/100 (developing), with a separate agent-readiness read of 44/100 (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. Every facet and dimension name is a link: it opens that measurement's page on APIs.io, where the rating runs across the whole catalog — the exact checks that feed it, how every profiled provider distributes on it, and who is at the top of it.
Put this on your own site. The badge is drawn live from ContactOut's current Kin Score — paste it once and it updates itself every time the score is recomputed. It follows your visitor's light or dark setting, and it links back here so anyone who sees it can read the full breakdown.
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/contactout/"
title="ContactOut on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/contactout.svg"
alt="ContactOut Kin Score — API readiness rating by API Evangelist" width="150" height="150" loading="lazy">
</a>
[](https://providers.apievangelist.com/providers/contactout/)
<!-- Kin Score · API Evangelist -->
<a href="https://providers.apievangelist.com/providers/contactout/"
title="ContactOut on API Evangelist — API profile and Kin Score">
<img src="https://apis.io/badge/contactout/card.svg"
alt="ContactOut Kin Score — API readiness rating by API Evangelist" width="340" height="120" loading="lazy">
</a>
More shapes, themes and sizes → · Score as JSON · How badges work
How we profile ContactOut
Each block below is one kind of artifact we hold for ContactOut. 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 15
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.
ContactOut API Usage Stats API
The API Usage Stats API from ContactOut — 1 operation(s) for api usage stats.
ContactOut Campaigns API
The Campaigns API API from ContactOut — 5 operation(s) for campaigns api.
ContactOut Company information from domains API
The Company information from domains API from ContactOut — 1 operation(s) for company information from domains.
ContactOut Company Search API
The Company Search API API from ContactOut — 1 operation(s) for company search api.
ContactOut Contact Checker API
The Contact Checker API API from ContactOut — 3 operation(s) for contact checker api.
ContactOut Contact Info API - Bulk API
The Contact Info API - Bulk API from ContactOut — 3 operation(s) for contact info api - bulk.
ContactOut Contact Info API - Single API
The Contact Info API - Single API from ContactOut — 1 operation(s) for contact info api - single.
ContactOut Decision Makers API
The Decision Makers API API from ContactOut — 1 operation(s) for decision makers api.
ContactOut Email to LinkedIn API
The Email to LinkedIn API API from ContactOut — 1 operation(s) for email to linkedin api.
ContactOut Email Verifier API
The Email Verifier API API from ContactOut — 3 operation(s) for email verifier api.
ContactOut Hashed Email API
The Hashed Email API API from ContactOut — 1 operation(s) for hashed email api.
ContactOut LinkedIn Profile API
The LinkedIn Profile API API from ContactOut — 2 operation(s) for linkedin profile api.
ContactOut People Count API
The People Count API API from ContactOut — 1 operation(s) for people count api.
ContactOut People Enrich API
The People Enrich API API from ContactOut — 1 operation(s) for people enrich api.
ContactOut People Search API
The People Search API API from ContactOut — 1 operation(s) for people search api.
Scroll within the panel for all 15 ·
MCP Servers 1
Model Context Protocol servers expose these APIs directly to AI agents. We profile them because agent-native access is the fastest-growing way this provider's capabilities actually get used.
Model Context Protocol servers that expose these APIs to AI agents.
ContactOut MCP
ContactOut provides an MCP (Model Context Protocol) server that lets AI assistants like Claude, Cursor, and other MCP-compatible clients call ContactOut APIs directly. Use natur...
MCP SERVERPricing 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 things the Kin Score reads for access clarity — renamed from commercial clarity in rubric 0.12, because a free statutory interface has access terms and no commercial ones.
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.
Contactout Rate Limits
RATE LIMITSEvent Specifications 1
Not every API is request/response. AsyncAPI describes the event-driven and streaming side — the webhooks and channels — so the asynchronous half of the interface is documented the same way the synchronous half is.
AsyncAPI definitions for this provider's event-driven and streaming APIs.
Contactout Webhooks
ASYNCAPISemantic Vocabularies 1
JSON-LD contexts give the data shared meaning across APIs. We profile them because semantics are what let a machine reconcile 'customer' here with 'customer' somewhere else.
JSON-LD contexts and semantic vocabularies used across these APIs.
Contactout Context
JSON-LDSpectral Rules 1
Governance rulesets we run against this provider's specs — the automated checks behind parts of the score. Profiling them makes the quality bar explicit and re-runnable, not a matter of opinion.
ContactOut API Rules
SPECTRALJSON Schema 6
Standalone JSON Schema definitions describe the data models behind the API. We profile them so the shapes are validatable on their own — useful long after a single request is forgotten.
Standalone JSON Schema definitions for this provider's data models.
CompanyInformationFromDomainsResponse
JSON SCHEMACompanySearchRequest
JSON SCHEMALinkedinProfileFromEmailAddressResponse
JSON SCHEMALinkedinProfileFromLinkedinUrlResponse
JSON SCHEMAPeopleEnrichResponse
JSON SCHEMAPeopleSearchRequest
JSON SCHEMASecurity Posture 2
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.
Scopes 1
OAuth scopes are the vocabulary of least-privilege access. Profiling them shows exactly what an integration — or an agent acting on a user's behalf — is allowed to do.
OAuth scopes governing access to this provider's APIs.
Resources
Every other property we hold for ContactOut — 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.
Get Started 2
Portal, sign-up, and the first successful call
Documentation 2
Reference material describing how the API behaves
Agent Surfaces 5
MCP servers, agent skills, and machine-readable catalogs
Design & Contract 9
Pagination, idempotency, versioning, errors, and events
Scroll within the panel for all 9 ·
Build 4
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Operate 3
Status, limits, changes, and where to get help
Commercial 4
Pricing, plans, and the legal terms of use
Company 2
The organization behind the API
Other 3
Properties that don't map to a standard resource type
← All providers · Data indexed from github.com/api-evangelist/contactout · machine-readable index on apis.io
This is an independent, third-party profile of ContactOut, published by API Evangelist. We do not operate, host, resell, or support these APIs, and we are not affiliated with or endorsed by the company unless stated above. Everything here is built from publicly available information — the company's own site, developer portal, documentation, public repositories, and the specifications it publishes for public use. Nothing is obtained by breaching a system, defeating an access control, or using credentials.
The Kin Score and Agent Readiness rating are independently calculated assessments of a company's public API artifacts, scored against a published rubric. They are not certifications, endorsements, security assessments, or audits.
Corrections, re-scores, and removal are free — no partnership or purchase required, and you do not need to justify the request. A removed company is recorded as unrated, never scored zero for having asked. Acknowledgement within one business day; removal within two.
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