# Mailrook, free, forever, GET /v1/validate/{email}, Validate a single email, full: Email verification API

> Simple REST API for real-time email validation. Sub-500ms response times, structured JSON responses, and comprehensive documentation. Integrate in minutes.

Mailrook's email verification API on its Free forever plan. It costs $0.00 per 1,000 emails. It returns 4 of the 6 key fields we check: Address, Deliverability, Confidence, Company.
The cheapest of the 1,712 plans we rank by price is [treg, top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt), at $0.00 per 1,000.

- This page: https://datacircle.dev/validate-email-apis/mailrook/free-forever-get-v1-validate-email-validate-a-single-email-full
- [Best email verification API in 2026](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://mailrook.com
- Its API docs: https://mailrook.com/docs/api
- Sold by: Mailrook (https://mailrook.com)
- Checked: 2026-10-20

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓
- Company: ✓

## Price

- $ per 1,000: $0.00
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Per: call
- Also pays for: from the same budget: Enrich a domain or email · Submit a batch of emails · Upload a file for batch validation

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Simple REST API for real-time email validation. Sub-500ms response times, structured JSON responses, and comprehensive documentation. Integrate in minutes.

## Data

- Freshness: live
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- You get: 25 credits a day
- Enough for: about 8 calls a day
- Expires: resets daily at midnight UTC

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email, include "enrichment"
- Method: GET
- Path: /v1/validate/{email}

## About the plan

- Plan: Free forever
- Who can get it: anyone

## The 39 fields the plan's answer can hold

validation ID, email, normalized email, username, domain, MX record, email provider, score, valid format, valid domain, deliverable, not catch-all, not generic address, not disposable, not free email provider, not university domain, result, reason, reason label, email security, protection level, domain status, did you mean, has SPF, has DMARC, has website, domain age days, domain created at, domain expires at, registrar, registrant organization, registrant country, nameserver hosts, A record IP, ASN, ASN organization, response code, response message, enrichment

## Mailrook's plans (6)

- [Mailrook, free, forever, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/free-forever-get-v1-validate-email-validate-a-single-email-full/llms.txt): $0.00 per 1,000, 67% complete, live
- [Mailrook, $39 pack, 10,000 credits, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/39-pack-10000-credits-get-v1-validate-email-validate-a-single-email-full/llms.txt): $11.70 per 1,000, 67% complete, live
- [Mailrook, $29 monthly, Starter, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/29-monthly-starter-get-v1-validate-email-validate-a-single-email-full/llms.txt): $11.60 per 1,000, 67% complete, live
- [Mailrook, $79 monthly, Business, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/79-monthly-business-get-v1-validate-email-validate-a-single-email-full/llms.txt): $5.925 per 1,000, 67% complete, live
- [Mailrook, $199 monthly, Scale, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/199-monthly-scale-get-v1-validate-email-validate-a-single-email-full/llms.txt): $3.98 per 1,000, 67% complete, live
- [Mailrook, contact us, Talk to us, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/contact-us-talk-to-us-get-v1-validate-email-validate-a-single-email-full/llms.txt): 67% complete, live

## Mailrook's calls (4)

- `POST /v1/validate/batch`: [Mailrook, free, forever, POST /v1/validate/batch](https://datacircle.dev/validate-email-apis/mailrook/free-forever-post-v1-validate-batch/llms.txt)
- `POST /v1/validate/batch/upload`: [Mailrook, free, forever, POST /v1/validate/batch/upload](https://datacircle.dev/validate-email-apis/mailrook/free-forever-post-v1-validate-batch-upload/llms.txt)
- `GET /v1/validate/{email}`, Validate a single email: [Mailrook, free, forever, GET /v1/validate/{email}, Validate a single email](https://datacircle.dev/validate-email-apis/mailrook/free-forever-get-v1-validate-email/llms.txt)
- `GET /v1/validate/{email}`, Validate a single email, full: [Mailrook, free, forever, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/free-forever-get-v1-validate-email-validate-a-single-email-full/llms.txt)

## Mailrook's APIs (2)

- [Mailrook: cached company enrichment API pricing, 6 plans](https://datacircle.dev/cached-company-enrichment-apis/mailrook/free/llms.txt)
- [Mailrook: email verification API pricing, 6 plans, GET /v1/validate/{email}, Validate a single email, full](https://datacircle.dev/validate-email-apis/mailrook/free-forever-get-v1-validate-email-validate-a-single-email-full/llms.txt)

## Mailrook: email verification API alternatives

- [Abstract API, $715 yearly](https://datacircle.dev/validate-email-apis/abstract-api/715-yearly/llms.txt): $3.972 per 1,000, 67% complete, live
- [Anymail Finder, $199 monthly](https://datacircle.dev/validate-email-apis/anymail-finder/199-monthly/llms.txt): $3.98 per 1,000, 17% complete, live
- [SafetyMails, $39.80 monthly](https://datacircle.dev/validate-email-apis/safetymails/39-80-monthly/llms.txt): $3.98 per 1,000, 33% complete, live
- [GetProspect, $399 monthly, Growth 50k, POST /v2/email-verifications](https://datacircle.dev/validate-email-apis/getprospect/399-monthly-growth-50k-post-v2-email-verifications/llms.txt): $3.99 per 1,000, 50% complete, live

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-10-20.

- https://mailrook.com
- https://mailrook.com/docs/api
- https://mailrook.com/domain-enrichment-api
- https://mailrook.com/email-validation-api
- https://mailrook.com/legal/privacy
- https://mailrook.com/legal/terms