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.

ContactOut is listed with 1 API on the APIs.io network. Tagged areas include Company, Contact Data, Email Finder, Data Enrichment, and People Search.

The ContactOut catalog on APIs.io includes 1 event-driven AsyncAPI specification, 1 JSON-LD context, and 1 Spectral governance ruleset.

ContactOut’s developer surface includes authentication, documentation, API reference, engineering blog, pricing, signup flow, and 31 more developer resources.

🌐 Visit website 📡 Source on GitHub

51.9/100 developing Agent 39/100 agent ready Full breakdown ↓
scored 2026-10-09 · rubric v0.23.0

1 API 1 MCP Servers

Company Contact Data Email Finder Data Enrichment People Search Company Search Email Verification Sales Intelligence Recruiting B2B Data

Kin Score

Kin Score How this is scored →
scored 2026-10-09 · rubric v0.23.0

Composite quality — 51.9/100 · developing

Contract Quality 6.4 / 21

Developer Ergonomics 7.6 / 17

Access Clarity 13.0 / 17

Operational Transparency 6.7 / 11

Contract Governance 2.0 / 10

Discoverability 6.1 / 9

Regulatory Posture 5.1 / 15

Agent readiness — 39/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 6 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 6 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 6 / 6

Agentic Commerce Well-Known Document 0 / 5

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 could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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 github.com/api-evangelist/contactout: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

ContactOut API

REST API for B2B contact data: enrich LinkedIn profiles and email addresses with verified work and personal emails, phone numbers and profile details; search and count people by...

MCP Servers 1

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 SERVER

Pricing Plans 1

Published pricing tiers and plan structures.

Contactout Plans Pricing

4 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Contactout Rate Limits

3 limits

RATE LIMITS

Event Specifications 1

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

Contactout Webhooks

ASYNCAPI

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Contactout Context

31 classes · 87 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

ContactOut API Rules

16 rules · 15 errors 1 info

SPECTRAL

OpenAPI Overlays 1

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.

Contactout Openapi Generated Overlay

27 actions · update · contactout-openapi-generated.yml

GENERATED

JSON Schema 6

Standalone JSON Schema definitions for this provider's data models.

CompanyInformationFromDomainsResponse

2 properties

JSON SCHEMA

CompanySearchRequest

12 properties

JSON SCHEMA

LinkedinProfileFromEmailAddressResponse

2 properties

JSON SCHEMA

LinkedinProfileFromLinkedinUrlResponse

2 properties

JSON SCHEMA

PeopleEnrichResponse

2 properties

JSON SCHEMA

PeopleSearchRequest

37 properties

JSON SCHEMA

Security Posture 2

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

Contactout Authentication

2 schemes

SECURITY

Contactout Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Contactout Scopes

1 scope

1 scopes

SCOPES

Resources

Get Started 2

Portal, sign-up, and the first successful call

Login

SignUp

SignUp

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 5

MCP servers, agent skills, and machine-readable catalogs

AgentSkill

LLMsTxt

MCPServer

WellKnown

LLMsTxt

Design & Contract 9

Pagination, idempotency, versioning, errors, and events

JSONLD

Vocabulary

Webhooks

DataModel

Conventions

Spectral

Lifecycle

ErrorCatalog

Conformance

Scroll for all 9

Build 4

SDKs, sample code, and the tooling you integrate with

ToolCrosswalk

ToolCrosswalk

SDKs

SDKs

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 3

Status, limits, changes, and where to get help

RateLimits

RateLimits

StatusPage

StatusPage

HelpCenter

HelpCenter

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Other 3

Properties that don't map to a standard resource type

Overlay

Overlay

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: contactout
name: ContactOut
description: 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.
url: https://raw.githubusercontent.com/api-evangelist/contactout/refs/heads/main/apis.yml
x-type: company
x-source: harvest:monid-connectors
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-07 (local-v5; was harvest)
specificationVersion: '0.20'
created: '2026-10-07'
modified: '2026-10-07'
tags:
- Company
- Contact Data
- Email Finder
- Data Enrichment
- People Search
- Company Search
- Email Verification
- Sales Intelligence
- Recruiting
- B2B Data
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
image: https://contactout.com/images/logo-square-200px.png
common:
- type: JSONLD
  url: json-ld/contactout-context.jsonld
- type: Vocabulary
  url: vocabulary/contactout-vocabulary.yml
- type: AgentSkill
  url: skills/_index.yml
- type: Webhooks
  url: asyncapi/contactout-webhooks.yml
- type: DataModel
  url: data-model/contactout-data-model.yml
- type: Conventions
  url: conventions/contactout-conventions.yml
- type: Overlay
  url: overlays/contactout-openapi-generated-overlay.yaml
- type: ToolCrosswalk
  url: mcp/contactout-tool-crosswalk.yml
- type: RateLimits
  url: rate-limits/contactout-rate-limits.yml
- type: Plans
  url: plans/contactout-plans-pricing.yml
- type: Spectral
  url: rules/contactout-rules.yml
- type: Authentication
  url: authentication/contactout-authentication.yml
- type: OAuthScopes
  url: scopes/contactout-scopes.yml
- type: Lifecycle
  url: lifecycle/contactout-lifecycle.yml
- type: ErrorCatalog
  url: errors/contactout-problem-types.yml
- type: Conformance
  url: conformance/contactout-conformance.yml
- type: LLMsTxt
  url: llms/contactout-llms.txt
- type: MCPServer
  url: mcp/contactout-mcp.yml
- type: WellKnown
  url: well-known/contactout-well-known.yml
- type: Hosts
  url: hosts/contactout-hosts.yml
- type: Vendors
  url: vendors/contactout-vendors.yml
- type: SDKs
  url: packages/contactout-packages.yml
- type: Packages
  url: packages/contactout-packages.yml
- type: DomainSecurity
  url: security/contactout-domain-security.yml
- type: Website
  url: https://contactout.com
- type: Documentation
  url: https://api.contactout.com
- type: APIReference
  url: https://api.contactout.com
- type: Blog
  url: https://blog.contactout.com/
- type: StatusPage
  url: https://status.contactout.com/
- type: Pricing
  url: https://contactout.com/pricing
- type: Login
  url: https://contactout.com/login
- type: SignUp
  url: https://contactout.com/register?from=home
- type: TermsOfService
  url: https://contactout.com/terms
- type: PrivacyPolicy
  url: https://contactout.com/privacy
- type: GitHubOrganization
  url: https://github.com/contactout
- type: HelpCenter
  url: https://contactout.freshdesk.com/support/home
- type: LLMsTxt
  url: https://contactout.com/llms.txt
apis:
- name: ContactOut API
  description: 'REST API for B2B contact data: enrich LinkedIn profiles and email addresses with verified work and personal
    emails, phone numbers and profile details; search and count people by criteria; search companies and enrich domains; find
    decision makers; check whether an email or phone exists for a profile without revealing it; verify email deliverability
    singly or in batch (with a webhook callback); manage outreach campaigns; and read API usage stats and remaining credits.
    Authenticated with an API token header; credit-metered per result.'
  humanURL: https://api.contactout.com
  baseURL: https://api.contactout.com
  tags:
  - Contact Data
  - Email Finder
  - Data Enrichment
  - People Search
  - Company Search
  - Email Verification
  - Sales Intelligence
  - Recruiting
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/contactout-openapi-generated.yml
  - type: Documentation
    url: https://api.contactout.com
  - type: APIReference
    url: https://api.contactout.com
  - type: JSONSchema
    url: json-schema/contactout-people-search-request-schema.json
  - type: JSONSchema
    url: json-schema/contactout-linkedin-profile-from-linkedin-url-response-schema.json
  - type: JSONSchema
    url: json-schema/contactout-linkedin-profile-from-email-address-response-schema.json
  - type: JSONSchema
    url: json-schema/contactout-people-enrich-response-schema.json
  - type: JSONSchema
    url: json-schema/contactout-company-search-request-schema.json
  - type: JSONSchema
    url: json-schema/contactout-company-information-from-domains-response-schema.json
  aid: contactout:contactout-api-2
  image: https://contactout.com/images/logo-square-200px.png
x-coverage:
  state: covered
  reason: covered
  detail: 'The API reference at api.contactout.com documents 27 REST operations and a hosted OAuth-gated MCP server at contactout.com/mcp;
    no provider-published machine-readable contract exists, so the OpenAPI was generated from that reference (x-generated-from:
    documentation).'
  evidence:
  - url: https://api.contactout.com
    status: 200
  - url: https://contactout.com/.well-known/oauth-authorization-server
    status: 200
  - url: https://contactout.com/mcp
    status: 401
  - url: https://api.contactout.com/openapi.json
    status: 404
  checked: '2026-10-07'
x-enrichment:
  date: '2026-10-07'
  status: enriched
  artifacts_added: 37
  pass: local-v5

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