Hunter

Best for: Prototypes and side projects - free to start, no sales call; AI agents and automation - an agent-ready surface (MCP / llms.txt); Teams needing broad API coverage out of the box

Avoid if: You have strict compliance requirements

• ███████░░░
  70 / 100
  Agent friendliness
• ██████████
  100 / 100
  Pricing transparency
• ██████████
  100 / 100
  Setup speed
• ██████░░░░
  60 / 100
  Docs quality
• ██████████
  100 / 100
  Procurement ease
• █▒░░░░░░░░
  15 / 100
  Trust readiness

Scores are computed deterministically from this profile's published, sourced fields (pricing, compliance, capabilities, docs and developer-surface signals) - not from reviews or paid placement. Each axis is 0-100; an unknown signal scores 0 for that axis. Procurement ease is the inverse of buying friction (higher = easier to adopt).

Pricing model

Hybrid (base + usage) [2]help.hunter.io/en/articles/11738860-credit-packs-how-to-buy-extra-credits-in-hunter“How much do credit packs cost? Each credit pack costs €10 / $10 / £8.40. The number of credits you get depends on your plan:”hunter.io/pricing“Choose the best plan to grow your business with Hunter, or stay on the Free plan. You can cancel or change your subscription at any time.”

Published pricing

✓ Yes [3]help.hunter.io/en/articles/11738860-credit-packs-how-to-buy-extra-credits-in-hunter“How much do credit packs cost? Each credit pack costs €10 / $10 / £8.40.”hunter.io/pricing“Choose the best plan to grow your business with Hunter, or stay on the Free plan. You can cancel or change your subscription at any time.”

Free tier

✓ Yes [4]hunter.io/pricing“Choose the best plan to grow your business with Hunter, or stay on the Free plan.”help.hunter.io/en/articles/11060999-what-s-included-in-hunter-s-free-plan“Hunter offers a completely free plan with no time limit, giving you access to core tools for finding, verifying, and reaching”

Free tier details

50 credits/month on the Free plan, perpetual with no time limit, renews automatically every month. Includes email finding, verification, bulk functionalities, sequences (1 email account, 500 recipients/sequence), Discover access, API access, integrations, and unlimited team members. [5]help.hunter.io/en/articles/11060999-what-s-included-in-hunter-s-free-plan“Hunter offers a completely free plan with no time limit, giving you access to core tools for finding, verifying, and reaching”hunter.io/pricing“Choose the best plan to grow your business with Hunter, or stay on the Free plan. You can cancel or change your subscription at any time.”

Self-serve signup

✓ Yes [6]hunter.io/pricing“Choose the best plan to grow your business with Hunter, or stay on the Free plan. You can cancel or change your subscription at any time.”hunter.io/api“Get started with Hunter's API. Browse our documentation and write your first API call. Start using Hunter programmatically within minutes. Get my free API key.”

Requires sales call

✗ No [7]hunter.io/pricing“Choose the best plan to grow your business with Hunter, or stay on the Free plan.”hunter.io/api“Get started with Hunter's API. Browse our documentation and write your first API call. Start using Hunter programmatically within minutes. Get my free API key.”

Enterprise plan

✓ Yes [8]help.hunter.io/en/articles/1897850-cancel-your-subscription-s-renewal“Enterprise subscriptions can only be cancelled after the minimum committed duration specified on your contract.”hunter.io/pricing“Choose the best plan to grow your business with Hunter, or stay on the Free plan. You can cancel or change your subscription at any time.”

• Real-time / single
• Bulk / list
• Catch-all detection
• Disposable detection
• Role-account detection
• Quality scoring
• Data enrichment
• Native integrations

Supported actions

email_verifier, domain_search, email_finder, email_count, discover, email_enrichment, company_enrichment, combined_enrichment, list_leads, get_lead, create_lead, upsert_lead, update_lead, delete_lead, list_custom_attributes, get_custom_attribute, create_custom_attribute, update_custom_attribute, delete_custom_attribute, list_leads_lists, get_leads_list, create_leads_list, update_leads_list, delete_leads_list, list_campaigns, list_campaign_recipients, add_campaign_recipient, cancel_campaign_recipient, start_campaign, get_account_info, get_company_logo [9]hunter.io/api-documentation“The Discover API endpoint is rate limited to 5 requests per second and 50 requests per minute.”hunter.io/api/campaigns“Hunter's API can support your tool seamlessly, with fast response times and near 100% uptime.”hunter.io/api/email-verifier“The Email Verifier API allows you to verify the validity of an email address. It takes an email address as input.”

Input types

email address (query parameter in GET request) [10]hunter.io/api/email-verifier“The Email Verifier API allows you to verify the validity of an email address. It takes an email address as input.”

Output types

JSON [11]hunter.io/api-documentationhunter.io/api/email-verifier“The Email Verifier API allows you to verify the validity of an email address. It takes an email address as input. The Email Verifier API response contains”

Webhooks

✓ Yes [12]help.hunter.io/en/articles/1970956-hunter-api

Sandbox / test mode

✓ Yes [13]hunter.io/api-documentation

SDK languages

Ruby, Node.js, Python, Laravel, Go, R [14]hunter.io/api-documentation

MCP server

✓ Yes [15]hunter.io/integrations“Hunter MCP. Model Context Protocol (MCP). Use our remote MCP server to integrate with our API endpoints using natural language.”hunter.io/blog/hunter-mcp-server-bringing-ai-and-b2b-data-together/“We've launched our MCP Server to help you build software and apps faster with Hunter's data, email verification, and more. Try it today.”

SOC 2

– Unknown [16]hunter.io/security-policy“This Security Policy describes Hunter's security program and technical and organizational security controls to protect customer data from unauthorized use.”

HIPAA

– Unknown [17]hunter.io/security-policy“This Security Policy describes Hunter's security program and technical and organizational security controls to protect customer data from unauthorized use.”

GDPR

✓ Yes [18]hunter.io/data-processing-agreement“This EU and UK Data Processing Agreement (Agreement) supplements the Terms of Service (the TOS) entered into by and between the customer signing this Agreement.”help.hunter.io/en/articles/1890029-gdpr-compliance“Hunter complies with the General Data Protection Regulation (GDPR), and helps its users comply as well.”

ISO 27001

– Unknown [19]hunter.io/security-policy“This Security Policy describes Hunter's security program and technical and organizational security controls to protect customer data from unauthorized use.”

PCI DSS

– Unknown [20]hunter.io/security-policy“This Security Policy describes Hunter's security program and technical and organizational security controls to protect customer data from unauthorized use.”

Published SLA

✗ No [21]hunter.io/terms-of-service“Hunter's Terms of Service. By accessing or using any part of Hunter's services, you agree to the present agreement.”

Rate limits

The Email Verifier API endpoint is rate limited to 10 requests per second and 300 requests per minute. Domain Search and Email Finder are rate-limited to 15 requests per second / 500 per minute. Discover is rate limited to 5 requests per second and 50 requests per minute. [22]hunter.io/api-documentation“The Discover API endpoint is rate limited to 5 requests per second and 50 requests per minute.”help.hunter.io/en/articles/1970956-hunter-api“The Domain Search and Email Finder API calls, are both rate-limited to 15 requests per second/ 500 per minute (per API key or IP).”

Known restrictions

Each API call needs to be performed with one piece of data at a time (1 contact, 1 domain, 1 email, etc.). We don't currently offer 'bulk' API calls., Error 451: Request denied due to legal reasons (GDPR/claimed personal data)., Discover: max 100 companies per response; offset and limit parameters are Premium only., Credit packs are not available on Free, Data Platform, or Enterprise plans., Webhooks are not available on Data Plans; webhooks are limited to email sequence/campaign events only., Test API key (test-api-key) only works with Domain Search, Email Finder, and Email Verifier endpoints and returns dummy data. [23]hunter.io/api-documentation“The Discover API endpoint is rate limited to 5 requests per second and 50 requests per minute.”help.hunter.io/en/articles/11738860-credit-packs-how-to-buy-extra-credits-in-hunter“How much do credit packs cost? Each credit pack costs €10 / $10 / £8.40. The number of credits you get depends on your plan:”help.hunter.io/en/articles/1970956-hunter-api

• Docs
• API reference
• Changelog
• Status page

Docs rendering: static · markdown variants served

API style

rest

Base URL

https://api.hunter.io/v2

Version

v2

Versioning

url

Stability

ga

Auth methods

api_key

Error format

vendor-specific

Rate limit

10 / second

SDKs

• Ruby emailhunter · repo
• Node.js hunterio · repo
• Python PyHunter · repo
• Laravel hunterio · repo
• Go hunter · repo
• R hunteR · repo

• Quickstart
• MCP server

Launched

2015-01-01

Notable customers

Semrush, Vimeo, Cisco, Canva, Customer.io, Xero, Gartner, Cursor, Autodesk, CloudTalk, Hostinger, Darwinbox, Belkins, Moosend, Hepper

• ZeroBounce

  Accurate, fast and secure email verification service

  Usage · free tier · public pricing · self-serve

• Verifalia

  Email list cleaning and real-time email verification service

  Hybrid · free tier · public pricing · self-serve

• Clearout

  Clearout is a real-time data quality engine that helps sales, marketing, customer success, product, and operations (Go-To-Market) teams maintain their contact data in a clean, accurate, and conversion-ready state.

  Hybrid · public pricing · self-serve

• Emailable

  The most accurate email verification platform

  Usage · public pricing · self-serve

• Bouncer

  Bouncer Email Verification API lets you validate email address and verify its deliverability, in the way you want.

  Usage · public pricing · self-serve

• Kickbox

  Kickbox is your all-in-one email verification platform, packed with the features, integrations and security you need to keep your email data clean and deliverable.

  Usage · free tier · public pricing · self-serve

Hunter alternatives · Hunter vs ZeroBounce · All Email Verification APIs APIs

Each field above carries a numbered source - hover for a preview, click to jump here.

1. ↑Description: hunter.io
2. ↑Pricing model: help.hunter.io · hunter.io
3. ↑Published pricing: help.hunter.io · hunter.io
4. ↑Free tier: hunter.io · help.hunter.io
5. ↑Free tier details: help.hunter.io · hunter.io
6. ↑Self-serve signup: hunter.io · hunter.io
7. ↑Requires sales call: hunter.io · hunter.io
8. ↑Enterprise plan: help.hunter.io · hunter.io
9. ↑Supported actions: hunter.io · hunter.io · hunter.io
10. ↑Input types: hunter.io
11. ↑Output types: hunter.io · hunter.io
12. ↑Webhooks: help.hunter.io
13. ↑Sandbox: hunter.io
14. ↑SDK languages: hunter.io
15. ↑MCP server: hunter.io · hunter.io
16. ↑SOC 2: hunter.io
17. ↑HIPAA: hunter.io
18. ↑GDPR: hunter.io · help.hunter.io
19. ↑ISO 27001: hunter.io
20. ↑PCI DSS: hunter.io
21. ↑Published SLA: hunter.io
22. ↑Rate limits: hunter.io · help.hunter.io
23. ↑Known restrictions: hunter.io · help.hunter.io · help.hunter.io

Every field change, who made it, and when - from our audited data pipeline and editors.

1. 2026-06-15 Score Docs Quality: 40 → 60
2. 2026-06-15 Score Agent Friendliness: 50 → 70
3. 2026-06-15 Has Structured Data: (none) → Yes
4. 2026-06-15 Markdown Docs URL: https://hunter.io/email-verifier.md → https://hunter.io/api.md
5. 2026-06-15 API Reference URL: (none) → https://hunter.io/api
6. 2026-06-15 Robots Allows Agents: (none) → Yes
7. 2026-06-14 Score Docs Quality: 0 → 40
8. 2026-06-14 Score Agent Friendliness: 40 → 50
9. 2026-06-14 Rendering: (none) → static
10. 2026-06-14 Llms Txt Present: (none) → No
11. 2026-06-14 Status Page URL: (none) → https://status.hunter.io
12. 2026-06-14 Changelog URL: (none) → https://hunter.io/changelog
13. 2026-06-14 Markdown Docs Served: (none) → Yes
14. 2026-06-14 Markdown Docs URL: (none) → https://hunter.io/email-verifier.md
15. 2026-06-14 Docs URL: (none) → https://hunter.io/api
16. 2026-06-09 Score Setup Speed: (none) → 100
17. 2026-06-09 Score Agent Friendliness: (none) → 40
18. 2026-06-09 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
19. 2026-06-09 Score Docs Quality: (none) → 0
20. 2026-06-09 Score Pricing Transparency: (none) → 100
21. 2026-06-09 Score Trust Readiness: (none) → 15
22. 2026-06-09 Score Procurement Friction: (none) → 100
23. 2026-06-09 Best For: (none) → Prototypes and side projects - free to start, no sales call, AI agents and auto…
24. 2026-06-09 Avoid If: (none) → You have strict compliance requirements
25. 2026-06-09 Capabilities: {} → {"bulk":true,"scoring":true,"realtime":true,"catch_all":true,"disposable":true,…
26. 2026-06-09 Starting Price Usd: 49 → 49
27. 2026-06-09 SDK Packages: Ruby, Node.js, Python, Laravel, Go, R → Ruby, Node.js, Python, Laravel, Go, R
28. 2026-06-09 Rate Limit Requests: set to 10
29. 2026-06-09 Rate Limit Window: set to second
30. 2026-06-09 Known Restrictions: set to Each API call needs to be performed with one piece of data at a time (1 contact…
31. 2026-06-09 Auth Methods: set to api_key
32. 2026-06-09 API Style: set to rest
33. 2026-06-09 Base URL: set to https://api.hunter.io/v2
34. 2026-06-09 API Version: set to v2
35. 2026-06-09 Versioning Scheme: set to url
36. 2026-06-09 Stability: set to ga
37. 2026-06-09 MCP URL: set to https://mcp.hunter.io
38. 2026-06-09 Quickstart URL: set to https://help.hunter.io/en/articles/12633706-how-to-verify-emails-via-api-with-c…
39. 2026-06-09 Error Format: set to vendor-specific
40. 2026-06-09 Requires Verification: set to No
41. 2026-06-09 Starting Price Usd: set to 49
42. 2026-06-09 Price Basis: set to month
43. 2026-06-09 Free Tier Limit: set to 50 credits/month
44. 2026-06-09 Launched At: set to 2015-01-01
45. 2026-06-09 Notable Customers: set to Semrush, Vimeo, Cisco, Canva, Customer.io, Xero, Gartner, Cursor, Autodesk, Clo…
46. 2026-06-09 Fields Not Found: set to soc2, iso_27001, hipaa, pci_dss, idempotency_supported
47. 2026-06-09 Extractor: set to parallel:ultra
48. 2026-06-09 Slug: set to hunter-email-verifier
49. 2026-06-09 Status: set to published
50. 2026-06-09 Last Verified At: set to 2026-06-06T00:00:00.000Z

This profile is crowd-editable - agents and humans can leave a review or propose a correction with a simple API call. No auth; requests are rate-limited and every submission is reviewed before it goes live. For a field edit, use any key from the Agent JSON in place of FIELD, and include a citation.

curl -X POST https://apio.sh/api/feedback/hunter-email-verifier \
  -H 'Content-Type: application/json' \
  -d '{"kind":"review","rating":5,"body":"Your experience with this API…"}'

curl -X POST https://apio.sh/api/suggest/hunter-email-verifier/FIELD \
  -H 'Content-Type: application/json' \
  -d '{"value":"corrected value","citations":[{"url":"https://source.example/page","excerpt":"supporting quote"}],"note":"what changed and why"}'

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