Hunter

Hunter.io is an email-intelligence and outbound platform that finds, verifies, and enriches professional email addresses at scale. Its public APIs cover Domain Search, Email Finder, Email Verifier, Email Count, Discover (company prospecting), Person/Company/Combined Enrichment, Leads management, and Account/usage inspection. Credit-based metering, plan-tiered monthly allowances, and per-endpoint rate limits make it a reference example of a usage-based B2B data API.

Hunter publishes 8 APIs on the APIs.io network, including Account API, Discover API, Domain Search API, and 5 more. Tagged areas include Email Finder, Email Verifier, Lead Generation, Outreach, and Prospecting.

The Hunter catalog on APIs.io includes 1 JSON-LD context and 2 Spectral governance rulesets.

Hunter’s developer surface includes authentication, developer portal, documentation, getting-started guide, changelog, engineering blog, signup flow, and 44 more developer resources.

🌐 Visit website 📡 Source on GitHub

65.7/100 strong ▬ flat Agent 34/100 agent ready Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemiumSelf serve⚡ Free to try

8 APIs 17 Features

Email FinderEmail VerifierLead GenerationOutreachProspectingEnrichmentSalesMarketing

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 65.7/100 · strong

Contract Quality 18.7 / 25

Developer Ergonomics 11.3 / 20

Commercial Clarity 12.1 / 20

Operational Transparency 8.9 / 13

Governance 8.3 / 12

Discoverability 6.5 / 10

Agent readiness — 34/100 · agent ready

Machine-Readable Contract 18 / 18

Agentic Access Contract 10 / 10

MCP Server 0 / 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 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/hunter-io: 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 8

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

Hunter Account API

Account metadata and usage counters.

Hunter Discover API

Company discovery and prospecting.

Hunter Domain Search API

Discover all emails for a domain or company.

Hunter Email Count API

Count emails for a domain.

Hunter Email Finder API

Find the email address of a person at a company.

Hunter Email Verifier API

Verify the deliverability of an email address.

Hunter Enrichment API

Person, company, and combined enrichment.

Hunter Leads API

Lead management.

Scroll for all 8

Postman Collections 8

Ready-to-run Postman collections for exercising this provider's APIs.

Hunter Account API

POSTMAN

Hunter Discover API

POSTMAN

Hunter Domain Search API

POSTMAN

Hunter Email Count API

POSTMAN

Hunter Email Finder API

POSTMAN

Hunter Email Verifier API

POSTMAN

Hunter Enrichment API

POSTMAN

Hunter Leads API

POSTMAN

Scroll for all 8

Open Collections 8

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

Hunter Account API

OPEN COLLECTION

Hunter Discover API

OPEN COLLECTION

Hunter Domain Search API

OPEN COLLECTION

Hunter Email Count API

OPEN COLLECTION

Hunter Email Finder API

OPEN COLLECTION

Hunter Email Verifier API

OPEN COLLECTION

Hunter Enrichment API

OPEN COLLECTION

Hunter Leads API

OPEN COLLECTION

Scroll for all 8

Arazzo Workflows 11

Multi-step API workflows described with the Arazzo specification.

Hunter Add Verified Lead To List

Verify an email, upsert it as a lead, then assign the lead to a target leads list.

ARAZZO

Hunter Author Finder

Resolve an author's email from their name and publication domain, verify it, then enrich their profile.

ARAZZO

Hunter Campaign Lead Builder

Find a contact, verify it, and seed a campaign by creating a verified lead in a target list.

ARAZZO

Hunter Count Gated Domain Search

Use the free Email Count to confirm coverage before spending a credit on Domain Search.

ARAZZO

Hunter Credit Guarded Domain Search

Check account search credits first and run a Domain Search only when credits remain.

ARAZZO

Hunter Discover To Domain Emails

Discover companies matching a target profile, then pull the email list for the top match's domain.

ARAZZO

Hunter Domain To Verified Email

Discover a domain's email pattern, find a specific person's email, then verify its deliverability.

ARAZZO

Hunter Enrich Email To Lead

Combined-enrich an email into person and company data, then upsert a fully populated lead.

ARAZZO

Hunter Find Verify Create Lead

Find a person's email, verify it, and create a lead only when the address is deliverable.

ARAZZO

Hunter Reverify Lead

Retrieve a stored lead, re-verify its email, and update or delete it based on the result.

ARAZZO

Hunter Verify Existing Email

Verify a known email and upsert it into Hunter as a lead with its verification status.

ARAZZO

Scroll for all 11

GraphQL 1

GraphQL schemas published by this provider.

Hunter.io GraphQL Schema

Conceptual GraphQL schema for the Hunter.io email intelligence and outbound platform, derived from the Hunter.io REST API (https://hunter.io/api-documentation/v2).

GRAPHQL

Pricing Plans 1

Published pricing tiers and plan structures.

Hunter Io Plans Pricing

5 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Hunter Io Rate Limits

8 limits

RATE LIMITS

FinOps 1

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

Hunter Io Finops

FINOPS

Features 17

Notable capabilities this provider offers.

Domain Search returns all emails for a domain with sources, confidence, department, and seniority

Email Finder predicts the most likely address for a person at a company with 0-100 confidence

Email Verifier runs MX, SMTP, regex, disposable, webmail, accept-all, and block checks plus database lookup

Email Count is free and unauthenticated for pre-flight sizing of a domain's email footprint

Discover API for company prospecting via natural language or structured filters

Person, company, and combined enrichment with optional Clearbit-shape response for drop-in migration

Leads API with CRUD, upsert, filtered list, custom attributes, and lead-list scoping

Campaigns API for outbound sequences, recipients, opens, clicks, replies, and unsubscribes

Account API returns plan, reset date, and per-meter usage counters for FinOps

{"Three auth modes" => "api_key query, X-API-KEY header, or Authorization Bearer"}

Token-bucket-style per-endpoint rate limits with 429 responses (5-15 rps, 50-500 rpm)

Monthly credit allowances per plan with reset_date semantics

Chrome and Firefox browser extensions, Google Sheets add-on, and Bulk Tasks UI

Native integrations with Salesforce, HubSpot, Zapier, Pipedrive, Zoho CRM, and many outbound tools

Hunter MCP server and ChatGPT MCP server for agentic email-finder workflows

Hunter Claude Plugin for find, verify, and enrich workflows inside Claude

GDPR-aligned data handling with 451 responses on restricted personal data

Scroll for all 17

JSON Schema 3

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

Examples 3

Example request and response payloads for these APIs.

Get Started 3

Portal, sign-up, and the first successful call

Portal

Portal

GettingStarted

GettingStarted

Signup

Signup

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess

AgenticAccess

Design & Contract 15

Pagination, idempotency, versioning, errors, and events

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

Arazzo

ErrorCodes

Vocabulary

SpectralRules

JSONStructure

Scroll for all 15

Build 15

SDKs, sample code, and the tooling you integrate with

PostmanWorkspace

PostmanWorkspace

GitHubOrganization

Plugin

Plugin

Tools

Tools

Tools

Tools

Tools

Plugin

Tools

Tools

Tools

Tools

SDKs

Scroll for all 15

Access & Security 3

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Authentication

Authentication

Authentication

Authentication

Operate 5

Status, limits, changes, and where to get help

RateLimits

ChangeLog

StatusPage

Support

RateLimits

Commercial 4

Pricing, plans, and the legal terms of use

PrivacyPolicy

TermsOfService

Plans

FinOps

Company 1

The organization behind the API

Blog

Blog

Other 2

Properties that don't map to a standard resource type

Resource

Resource

Glossary

Glossary

Source (apis.yml)

aid: hunter-io
url: https://raw.githubusercontent.com/api-evangelist/hunter-io/refs/heads/main/apis.yml
apis:
- aid: hunter-io:hunter-io-account-api
  name: Hunter Account API
  description: Account metadata and usage counters.
  humanURL: https://hunter.io/api-documentation/v2#domain-search
  tags:
  - Account
  properties:
  - type: OpenAPI
    url: openapi/hunter-io-account-api-openapi.yml
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#domain-search
  - type: JSONSchema
    url: json-schema/hunter-email-schema.json
  - type: JSONLD
    url: json-ld/hunter-io-context.jsonld
  - type: Examples
    url: examples/hunter-domain-search-example.json
  - type: GraphQL
    url: graphql/hunter-io-graphql.md
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-finder
  - type: Examples
    url: examples/hunter-email-finder-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-verifier
  - type: JSONSchema
    url: json-schema/hunter-verification-schema.json
  - type: Examples
    url: examples/hunter-email-verifier-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-count
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#discover
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#enrichment
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#account
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#leads
  - type: JSONSchema
    url: json-schema/hunter-lead-schema.json
- aid: hunter-io:hunter-io-discover-api
  name: Hunter Discover API
  description: Company discovery and prospecting.
  humanURL: https://hunter.io/api-documentation/v2#domain-search
  tags:
  - Discover
  properties:
  - type: OpenAPI
    url: openapi/hunter-io-discover-api-openapi.yml
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#domain-search
  - type: JSONSchema
    url: json-schema/hunter-email-schema.json
  - type: JSONLD
    url: json-ld/hunter-io-context.jsonld
  - type: Examples
    url: examples/hunter-domain-search-example.json
  - type: GraphQL
    url: graphql/hunter-io-graphql.md
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-finder
  - type: Examples
    url: examples/hunter-email-finder-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-verifier
  - type: JSONSchema
    url: json-schema/hunter-verification-schema.json
  - type: Examples
    url: examples/hunter-email-verifier-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-count
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#discover
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#enrichment
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#account
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#leads
  - type: JSONSchema
    url: json-schema/hunter-lead-schema.json
- aid: hunter-io:hunter-io-domain-search-api
  name: Hunter Domain Search API
  description: Discover all emails for a domain or company.
  humanURL: https://hunter.io/api-documentation/v2#domain-search
  tags:
  - Domain Search
  properties:
  - type: OpenAPI
    url: openapi/hunter-io-domain-search-api-openapi.yml
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#domain-search
  - type: JSONSchema
    url: json-schema/hunter-email-schema.json
  - type: JSONLD
    url: json-ld/hunter-io-context.jsonld
  - type: Examples
    url: examples/hunter-domain-search-example.json
  - type: GraphQL
    url: graphql/hunter-io-graphql.md
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-finder
  - type: Examples
    url: examples/hunter-email-finder-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-verifier
  - type: JSONSchema
    url: json-schema/hunter-verification-schema.json
  - type: Examples
    url: examples/hunter-email-verifier-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-count
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#discover
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#enrichment
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#account
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#leads
  - type: JSONSchema
    url: json-schema/hunter-lead-schema.json
- aid: hunter-io:hunter-io-email-count-api
  name: Hunter Email Count API
  description: Count emails for a domain.
  humanURL: https://hunter.io/api-documentation/v2#domain-search
  tags:
  - Email Count
  properties:
  - type: OpenAPI
    url: openapi/hunter-io-email-count-api-openapi.yml
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#domain-search
  - type: JSONSchema
    url: json-schema/hunter-email-schema.json
  - type: JSONLD
    url: json-ld/hunter-io-context.jsonld
  - type: Examples
    url: examples/hunter-domain-search-example.json
  - type: GraphQL
    url: graphql/hunter-io-graphql.md
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-finder
  - type: Examples
    url: examples/hunter-email-finder-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-verifier
  - type: JSONSchema
    url: json-schema/hunter-verification-schema.json
  - type: Examples
    url: examples/hunter-email-verifier-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-count
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#discover
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#enrichment
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#account
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#leads
  - type: JSONSchema
    url: json-schema/hunter-lead-schema.json
- aid: hunter-io:hunter-io-email-finder-api
  name: Hunter Email Finder API
  description: Find the email address of a person at a company.
  humanURL: https://hunter.io/api-documentation/v2#domain-search
  tags:
  - Email Finder
  properties:
  - type: OpenAPI
    url: openapi/hunter-io-email-finder-api-openapi.yml
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#domain-search
  - type: JSONSchema
    url: json-schema/hunter-email-schema.json
  - type: JSONLD
    url: json-ld/hunter-io-context.jsonld
  - type: Examples
    url: examples/hunter-domain-search-example.json
  - type: GraphQL
    url: graphql/hunter-io-graphql.md
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-finder
  - type: Examples
    url: examples/hunter-email-finder-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-verifier
  - type: JSONSchema
    url: json-schema/hunter-verification-schema.json
  - type: Examples
    url: examples/hunter-email-verifier-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-count
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#discover
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#enrichment
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#account
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#leads
  - type: JSONSchema
    url: json-schema/hunter-lead-schema.json
- aid: hunter-io:hunter-io-email-verifier-api
  name: Hunter Email Verifier API
  description: Verify the deliverability of an email address.
  humanURL: https://hunter.io/api-documentation/v2#domain-search
  tags:
  - Email Verifier
  properties:
  - type: OpenAPI
    url: openapi/hunter-io-email-verifier-api-openapi.yml
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#domain-search
  - type: JSONSchema
    url: json-schema/hunter-email-schema.json
  - type: JSONLD
    url: json-ld/hunter-io-context.jsonld
  - type: Examples
    url: examples/hunter-domain-search-example.json
  - type: GraphQL
    url: graphql/hunter-io-graphql.md
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-finder
  - type: Examples
    url: examples/hunter-email-finder-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-verifier
  - type: JSONSchema
    url: json-schema/hunter-verification-schema.json
  - type: Examples
    url: examples/hunter-email-verifier-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-count
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#discover
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#enrichment
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#account
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#leads
  - type: JSONSchema
    url: json-schema/hunter-lead-schema.json
- aid: hunter-io:hunter-io-enrichment-api
  name: Hunter Enrichment API
  description: Person, company, and combined enrichment.
  humanURL: https://hunter.io/api-documentation/v2#domain-search
  tags:
  - Enrichment
  properties:
  - type: OpenAPI
    url: openapi/hunter-io-enrichment-api-openapi.yml
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#domain-search
  - type: JSONSchema
    url: json-schema/hunter-email-schema.json
  - type: JSONLD
    url: json-ld/hunter-io-context.jsonld
  - type: Examples
    url: examples/hunter-domain-search-example.json
  - type: GraphQL
    url: graphql/hunter-io-graphql.md
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-finder
  - type: Examples
    url: examples/hunter-email-finder-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-verifier
  - type: JSONSchema
    url: json-schema/hunter-verification-schema.json
  - type: Examples
    url: examples/hunter-email-verifier-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-count
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#discover
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#enrichment
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#account
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#leads
  - type: JSONSchema
    url: json-schema/hunter-lead-schema.json
- aid: hunter-io:hunter-io-leads-api
  name: Hunter Leads API
  description: Lead management.
  humanURL: https://hunter.io/api-documentation/v2#domain-search
  tags:
  - Leads
  properties:
  - type: OpenAPI
    url: openapi/hunter-io-leads-api-openapi.yml
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#domain-search
  - type: JSONSchema
    url: json-schema/hunter-email-schema.json
  - type: JSONLD
    url: json-ld/hunter-io-context.jsonld
  - type: Examples
    url: examples/hunter-domain-search-example.json
  - type: GraphQL
    url: graphql/hunter-io-graphql.md
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-finder
  - type: Examples
    url: examples/hunter-email-finder-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-verifier
  - type: JSONSchema
    url: json-schema/hunter-verification-schema.json
  - type: Examples
    url: examples/hunter-email-verifier-example.json
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#email-count
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#discover
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#enrichment
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#account
  - type: Documentation
    url: https://hunter.io/api-documentation/v2#leads
  - type: JSONSchema
    url: json-schema/hunter-lead-schema.json
name: Hunter
tags:
- Email Finder
- Email Verifier
- Lead Generation
- Outreach
- Prospecting
- Enrichment
- Sales
- Marketing
kind: contract
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/hunter-io.png
access: 3rd-Party
common:
- type: AgenticAccess
  url: agentic-access/hunter-io-agentic-access.yml
- type: DomainSecurity
  url: security/hunter-io-domain-security.yml
- type: Authentication
  url: authentication/hunter-io-authentication.yml
- type: PostmanWorkspace
  url: https://www.postman.com/kinlaneapi/hunter/overview
- type: Arazzo
  url: arazzo/hunter-io-add-verified-lead-to-list-workflow.yml
  name: Hunter Add Verified Lead To List
- type: Arazzo
  url: arazzo/hunter-io-author-finder-workflow.yml
  name: Hunter Author Finder
- type: Arazzo
  url: arazzo/hunter-io-campaign-lead-builder-workflow.yml
  name: Hunter Campaign Lead Builder
- type: Arazzo
  url: arazzo/hunter-io-count-gated-domain-search-workflow.yml
  name: Hunter Count Gated Domain Search
- type: Arazzo
  url: arazzo/hunter-io-credit-guarded-domain-search-workflow.yml
  name: Hunter Credit Guarded Domain Search
- type: Arazzo
  url: arazzo/hunter-io-discover-to-domain-emails-workflow.yml
  name: Hunter Discover To Domain Emails
- type: Arazzo
  url: arazzo/hunter-io-domain-to-verified-email-workflow.yml
  name: Hunter Domain To Verified Email
- type: Arazzo
  url: arazzo/hunter-io-enrich-email-to-lead-workflow.yml
  name: Hunter Enrich Email To Lead
- type: Arazzo
  url: arazzo/hunter-io-find-verify-create-lead-workflow.yml
  name: Hunter Find Verify Create Lead
- type: Arazzo
  url: arazzo/hunter-io-reverify-lead-workflow.yml
  name: Hunter Reverify Lead
- type: Arazzo
  url: arazzo/hunter-io-verify-existing-email-workflow.yml
  name: Hunter Verify Existing Email
- type: Portal
  url: https://hunter.io
- type: Documentation
  url: https://hunter.io/api-documentation
- type: Documentation
  url: https://hunter.io/api-documentation/v2
- type: GettingStarted
  url: https://hunter.io/api-documentation/v2#introduction
- type: Authentication
  url: https://hunter.io/api-documentation/v2#authentication
- type: RateLimits
  url: https://hunter.io/api-documentation/v2#rate-limiting
- type: ErrorCodes
  url: https://hunter.io/api-documentation/v2#errors
- type: ChangeLog
  url: https://hunter.io/api-documentation/v2#changelog
- type: Blog
  url: https://hunter.io/blog
- type: Signup
  url: https://hunter.io/users/sign_up
- type: PrivacyPolicy
  url: https://hunter.io/privacy
- type: TermsOfService
  url: https://hunter.io/terms
- type: StatusPage
  url: https://status.hunter.io
- type: Support
  url: https://hunter.io/contact
- type: GitHubOrganization
  url: https://github.com/hunter-io
- url: https://chrome.google.com/webstore/detail/hunter-find-email-address/hgmhmanijnjhaffoampdlllchpolkdnj
  name: Hunter Chrome Extension
  type: Plugin
- url: https://addons.mozilla.org/en-US/firefox/addon/hunterio/
  name: Hunter Firefox Add-on
  type: Plugin
- url: https://hunter.io/integrations/salesforce
  name: Salesforce Integration
  type: Integrations
- url: https://hunter.io/integrations/hubspot
  name: HubSpot Integration
  type: Integrations
- url: https://hunter.io/integrations/zapier
  name: Zapier Integration
  type: Integrations
- url: https://hunter.io/integrations/pipedrive
  name: Pipedrive Integration
  type: Integrations
- url: https://hunter.io/integrations/zoho
  name: Zoho CRM Integration
  type: Integrations
- url: https://hunter.io/email-pattern
  name: Email Pattern Finder
  type: Tools
- url: https://hunter.io/email-verifier
  name: Email Verifier Tool
  type: Tools
- url: https://hunter.io/email-finder
  name: Email Finder Tool
  type: Tools
- url: https://hunter.io/bulks
  name: Bulk Tasks
  type: Tools
- url: https://hunter.io/companies
  name: Hunter Companies Directory
  type: Tools
- url: https://hunter.io/templates
  name: Cold Email Templates
  type: Resource
- url: https://hunter.io/email-marketing-glossary
  name: Email Marketing Glossary
  type: Glossary
- url: https://github.com/hunter-io/claude-plugin
  name: Hunter Claude Plugin
  type: Plugin
- url: https://github.com/hunter-io/chatgpt-mcp
  name: Hunter MCP Server for ChatGPT
  type: Tools
- url: https://github.com/hunter-io/hunter-mcp
  name: Hunter MCP Integration (archived)
  type: Tools
- url: https://github.com/hunter-io/mcp-oauth-proxy
  name: MCP OAuth Proxy
  type: Tools
- url: https://github.com/hunter-io/baseimage-ruby
  name: Hunter Ruby Base Image
  type: Tools
- url: https://github.com/hunter-io/sentry-ruby
  name: Sentry Ruby (Hunter fork)
  type: SDKs
- url: plans/hunter-io-plans-pricing.yml
  type: Plans
- url: rate-limits/hunter-io-rate-limits.yml
  type: RateLimits
- url: finops/hunter-io-finops.yml
  type: FinOps
- url: vocabulary/hunter-io-vocabulary.yml
  type: Vocabulary
- url: rules/hunter-io-rules.yml
  type: SpectralRules
- url: json-structure/hunter-io-structure.json
  type: JSONStructure
- type: Features
  data:
  - Domain Search returns all emails for a domain with sources, confidence, department, and seniority
  - Email Finder predicts the most likely address for a person at a company with 0-100 confidence
  - Email Verifier runs MX, SMTP, regex, disposable, webmail, accept-all, and block checks plus database lookup
  - Email Count is free and unauthenticated for pre-flight sizing of a domain's email footprint
  - Discover API for company prospecting via natural language or structured filters
  - Person, company, and combined enrichment with optional Clearbit-shape response for drop-in migration
  - Leads API with CRUD, upsert, filtered list, custom attributes, and lead-list scoping
  - Campaigns API for outbound sequences, recipients, opens, clicks, replies, and unsubscribes
  - Account API returns plan, reset date, and per-meter usage counters for FinOps
  - Three auth modes: api_key query, X-API-KEY header, or Authorization Bearer
  - Token-bucket-style per-endpoint rate limits with 429 responses (5-15 rps, 50-500 rpm)
  - Monthly credit allowances per plan with reset_date semantics
  - Chrome and Firefox browser extensions, Google Sheets add-on, and Bulk Tasks UI
  - Native integrations with Salesforce, HubSpot, Zapier, Pipedrive, Zoho CRM, and many outbound tools
  - Hunter MCP server and ChatGPT MCP server for agentic email-finder workflows
  - Hunter Claude Plugin for find, verify, and enrich workflows inside Claude
  - GDPR-aligned data handling with 451 responses on restricted personal data
  sources:
  - https://hunter.io/api-documentation
  - https://hunter.io/pricing
  - https://hunter.io/api
  - https://github.com/hunter-io
  updated: '2026-05-25'
created: '2026-05-25T00:00:00.000Z'
modified: '2026-05-25'
position: Consuming
description: Hunter.io is an email-intelligence and outbound platform that finds, verifies, and enriches professional email
  addresses at scale. Its public APIs cover Domain Search, Email Finder, Email Verifier, Email Count, Discover (company prospecting),
  Person/Company/Combined Enrichment, Leads management, and Account/usage inspection. Credit-based metering, plan-tiered monthly
  allowances, and per-endpoint rate limits make it a reference example of a usage-based B2B data API.
maintainers:
- FN: Kin Lane
  email: info@apievangelist.com
  X: apievangelist
  url: https://apievangelist.com
specificationVersion: '0.16'

Hunter

APIs 8

Postman Collections 8

Open Collections 8

Arazzo Workflows 11

GraphQL 1

Pricing Plans 1

Rate Limits 1

FinOps 1

Features 17

Semantic Vocabularies 1

Spectral Rules 2

JSON Schema 3

JSON Structure 1

Examples 3

Security Posture 2

Agentic Access 1

Get Started 3

Documentation 2

Agent Surfaces 1

Design & Contract 15

Build 15

Access & Security 3

Operate 5

Commercial 4

Company 1

Other 2

Source (apis.yml)