AbstractAPI Email Validation API

Best for: Prototypes and side projects - free to start, no sales call; Regulated or enterprise workloads - compliance attestations and an enterprise plan; AI agents and automation - an agent-ready surface (MCP / llms.txt)

• █████▒░░░░
  55 / 100
  Agent friendliness
• ██████████
  100 / 100
  Pricing transparency
• ██████████
  100 / 100
  Setup speed
• ████▒░░░░░
  45 / 100
  Docs quality
• ██████████
  100 / 100
  Procurement ease
• ██████░░░░
  60 / 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]abstractapi.com/api/email-verification-validation-apiabstractapi.com/legal/legal

Published pricing

✓ Yes [3]abstractapi.com/api/email-verification-validation-api

Free tier

✓ Yes [4]abstractapi.com/api/email-verification-validation-api

Free tier details

$0 / month, 100 requests / month, full API response. Note: 'free tiers… may not be used in commercial projects.' [5]abstractapi.com/api/email-verification-validation-apiabstractapi.com/api

Self-serve signup

✓ Yes [6]abstractapi.com/api/email-verification-validation-api

Requires sales call

✗ No [7]abstractapi.com/api/email-verification-validation-api

Enterprise plan

✓ Yes [8]abstractapi.com/api/email-verification-validation-api

• Real-time / single
• Bulk / list
• Disposable detection
• Role-account detection
• SMTP / mailbox check
• Quality scoring

Supported actions

validate_email, bulk_validate_csv [9]docs.abstractapi.com/api/email-validation“emailvalidation.abstractapi.com/v1”

Regions

Global [10]abstractapi.com/api/email-verification-validation-api

Input types

email address (string via query parameter), CSV (bulk upload) [11]docs.abstractapi.com/api/email-validation“email”

Output types

JSON [12]docs.abstractapi.com/api/email-validationgithub.com/abstractapi/php-email-validation“RESTful JSON API for determining the validity and other details of email”

Webhooks

✗ No [13]docs.abstractapi.com/api/email-validation

Sandbox / test mode

✓ Yes [14]abstractapi.com/api/email-verification-validation-api

SDK languages

Node.js, Python, PHP [15]github.com/abstractapigithub.com/abstractapi/php-email-validation“Abstract's Email Validation and Verification API is a fast, lightweight, modern, and RESTful JSON API”

MCP server

✗ No [16]github.com/abstractapigithub.com/avivshafir/abstractapi-mcp-server“A Model Context Protocol (MCP) server that provides email and phone validation tools using Abstract API services.”

SOC 2

SOC 2 Type II [17]abstractapi.com/api/email-verification-validation-api

HIPAA

✗ No [18]abstractapi.com/legal/legal

GDPR

✓ Yes [19]abstractapi.com/api/email-verification-validation-apiabstractapi.com/legal/legal

ISO 27001

– Unknown [20]abstractapi.com/legal/legalabstractapi.com/api/email-verification-validation-api

PCI DSS

– Unknown [21]abstractapi.com/api/email-verification-validation-apiabstractapi.com/legal/legal

Published SLA

✓ Yes [22]abstractapi.com/legal/legal“This SLA”

Rate limits

Free plans: 'requests are limited to 1 per second'; Paid plans (Starter/Standard/Professional): '3 requests / second'; Enterprise: 'Flexible requests / second' [23]abstractapi.com/api/email-verification-validation-apiabstractapi.com/legal/legaldocs.abstractapi.com/api/email-validation“requests are limited to 1 per second”

Known restrictions

'is_mx_found' - 'Only available on paid plans. Will return null and UNKNOWN on free plans.', Free plans limited to 1 request per second., Bulk CSV upload maximum: '50,000 rows'., 'The free tiers… may not be used in commercial projects.', 'If you exceed your plan's limit by 40% or more in overages, you will be automatically upgraded to the next higher-tier plan.', 'Each individual email you submit counts as a credit used. Credits are also counted per request, not per successful response.' [24]docs.abstractapi.com/api/email-validation“nly available on paid plans. Will return `null` and `UNKNOWN` on free pla”abstractapi.com/legal/legalabstractapi.com/api

• Docs
• API reference
• llms.txt
• Status page

Docs rendering: static · llms.txt present

API style

rest

Base URL

https://emailvalidation.abstractapi.com/v1

Version

v1

Versioning

url

Stability

ga

Auth methods

api_key

Error format

vendor-specific

Rate limit

3 / second

SDKs

• Node.js @abstractapi/javascript-email-validation · repo
• Python abstract-python-email-validation · repo
• PHP abstractapi/php-email-validation · repo

• Auth docs
• Quickstart

Notable customers

Compass, Wolters Kluwer, Salesforce, Google, PepsiCo, Wells Fargo, LinkedIn, Paramount, United Airlines, McKinsey

• ZeroBounce

  Accurate, fast and secure email verification service

  Usage · free tier · public pricing · self-serve

• Hunter

  A free email checker to instantly spot risky or fake email addresses. Verify emails with thorough checks: format, domain information, servers response, accept-all.

  Hybrid · 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

AbstractAPI Email Validation API alternatives · AbstractAPI Email Validation API vs ZeroBounce · All Email Verification APIs APIs

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

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

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

1. 2026-06-15 Score Docs Quality: 25 → 45
2. 2026-06-15 Score Agent Friendliness: 35 → 55
3. 2026-06-15 Llms Txt URL: https://www.abstractapi.com/llms.txt → https://docs.abstractapi.com/llms.txt
4. 2026-06-15 API Reference URL: (none) → https://docs.abstractapi.com/api
5. 2026-06-15 Robots Allows Agents: (none) → Yes
6. 2026-06-15 Has Structured Data: (none) → Yes
7. 2026-06-14 Score Docs Quality: 0 → 25
8. 2026-06-14 Best For: Prototypes and side projects - free to start, no sales call, Regulated or enter… → Prototypes and side projects - free to start, no sales call, Regulated or enter…
9. 2026-06-14 Score Agent Friendliness: 20 → 35
10. 2026-06-14 Llms Txt URL: (none) → https://www.abstractapi.com/llms.txt
11. 2026-06-14 Llms Txt Present: (none) → Yes
12. 2026-06-14 Rendering: (none) → static
13. 2026-06-14 Status Page URL: (none) → https://status.abstractapi.com
14. 2026-06-14 Docs URL: (none) → https://docs.abstractapi.com
15. 2026-06-10 Known Restrictions: 'is_mx_found' — 'Only available on paid plans. Will return null and UNKNOWN on … → 'is_mx_found' - 'Only available on paid plans. Will return null and UNKNOWN on …
16. 2026-06-09 Score Agent Friendliness: (none) → 20
17. 2026-06-09 Score Setup Speed: (none) → 100
18. 2026-06-09 Scoring Methodology: (none) → Scores are computed deterministically from this profile's published, sourced fi…
19. 2026-06-09 Score Pricing Transparency: (none) → 100
20. 2026-06-09 Best For: (none) → Prototypes and side projects - free to start, no sales call, Regulated or enter…
21. 2026-06-09 Score Trust Readiness: (none) → 60
22. 2026-06-09 Score Procurement Friction: (none) → 100
23. 2026-06-09 Score Docs Quality: (none) → 0
24. 2026-06-09 Capabilities: {} → {"bulk":true,"scoring":true,"realtime":true,"disposable":true,"smtp_check":true…
25. 2026-06-09 Starting Price Usd: 17 → 17
26. 2026-06-09 SDK Packages: Node.js, Python, PHP → Node.js, Python, PHP
27. 2026-06-09 SLA Published: set to Yes
28. 2026-06-09 SLA URL: set to https://www.abstractapi.com/legal/legal
29. 2026-06-09 Data Retention Policy URL: set to https://www.abstractapi.com/legal/legal
30. 2026-06-09 Documented Rate Limits: set to Free plans: 'requests are limited to 1 per second'; Paid plans (Starter/Standar…
31. 2026-06-09 Rate Limit Requests: set to 3
32. 2026-06-09 Rate Limit Window: set to second
33. 2026-06-09 Known Restrictions: set to 'is_mx_found' — 'Only available on paid plans. Will return null and UNKNOWN on …
34. 2026-06-09 Auth Methods: set to api_key
35. 2026-06-09 Auth Docs URL: set to https://docs.abstractapi.com/api/email-validation
36. 2026-06-09 API Style: set to rest
37. 2026-06-09 Base URL: set to https://emailvalidation.abstractapi.com/v1
38. 2026-06-09 API Version: set to v1
39. 2026-06-09 Versioning Scheme: set to url
40. 2026-06-09 Stability: set to ga
41. 2026-06-09 Quickstart URL: set to https://docs.abstractapi.com/api/email-validation
42. 2026-06-09 Error Format: set to vendor-specific
43. 2026-06-09 Requires Verification: set to No
44. 2026-06-09 Starting Price Usd: set to 17
45. 2026-06-09 Price Basis: set to month
46. 2026-06-09 Free Tier Limit: set to 100 requests/month
47. 2026-06-09 Notable Customers: set to Compass, Wolters Kluwer, Salesforce, Google, PepsiCo, Wells Fargo, LinkedIn, Pa…
48. 2026-06-09 Fields Not Found: set to iso_27001, pci_dss, ga_date, launched_at, deprecation_policy_url, idempotency_s…
49. 2026-06-09 Slug: set to abstractapi-email
50. 2026-06-09 Extractor: set to parallel:ultra

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/abstractapi-email \
  -H 'Content-Type: application/json' \
  -d '{"kind":"review","rating":5,"body":"Your experience with this API…"}'

curl -X POST https://apio.sh/api/suggest/abstractapi-email/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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