# Hunter

**Canonical:** https://apis.io/providers/hunter-io/  
**Website:** https://hunter.io  
**APIs profiled:** 8

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.

## Kin Score — 56.8 / 100 (strong)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 56.8).

| Facet | Score |
|---|---|
| Discoverability | 64.8 |
| Contract Quality | 71.5 |
| Governance | 25.0 |
| Contract Governance | 25.0 |
| Operational Transparency | 50.0 |
| Developer Ergonomics | 61.9 |
| Commercial Clarity | 52.6 |
| Access Clarity | 52.6 |

## Agent readiness — 32.5 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | yes |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (8)

- **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.

## Agentic access (1)

- **Hunter Io Agentic Access** — 15 operations · 5 acting

## Security (2)

- **Hunter Io Authentication** — apiKey/http · 3 schemes
- **Hunter Io Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Hunter Io Plans Pricing**

## Tags

Email Finder, Email Verifier, Lead Generation, Outreach, Prospecting, Enrichment, Sales, Marketing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/hunter-io/). Scores are computed from the provider's own public artifacts under a published rubric.