# MailValidation.io, free, Free, POST /api/validate/: Email validation API

> MailValidation.io checks every address in real time — catching typos, disposable domains, and fake signups before they cost you a bounce, a blocklist, or a wasted send.

MailValidation.io's email validation API on its Free plan, $0.00 per 1,000 emails. 2 of the 6 key fields: Address, Its check.

- This page: https://datacircle.dev/validate-email-apis/mailvalidation-io/free-free-post-api-validate
- Get it: https://mailvalidation.io/#pricing
- Its API docs: https://app.mailvalidation.io/docs/#validate
- Sold by: MailValidation.io (https://mailvalidation.io)
- Checked: 2026-10-19

## In the answer

- Completeness: 33%
- Address: ✓
- Its check: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Per: call
- Also pays for: from the same budget: validate_email_bulk (POST /a/{team_slug}/validate/api/bulk/) · Widget API endpoint (POST /api/widget/{widget_key}/validate/)

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: MailValidation.io checks every address in real time — catching typos, disposable domains, and fake signups before they cost you a bounce, a blocklist, or a wasted send.

## Data

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

## Plan

- Pay: $0
- You get: 100 credits
- Enough for: 100 calls

## Rate limit

- Per second: 0.28
- Batch: 1

## Speed

- Answer: in the call or by polling

## The call

- You send: email. Optional: verbose
- Method: POST
- Path: /api/validate/

## About the plan

- Plan: Free
- Who can get it: anyone

## The 17 fields the plan's answer can hold

verification ID, email, mailbox exists, blocklisted, syntax valid, DNS found, nameservers valid, DNS timeout, DNS config error, no MX, no valid MX, disposable, catch-all, role address, free email, processing, last validated

## MailValidation.io's plans (5)

- [MailValidation.io, free, Free, POST /api/validate/](https://datacircle.dev/validate-email-apis/mailvalidation-io/free-free-post-api-validate/llms.txt): $0.00 per 1,000, 33% complete, live
- [MailValidation.io, $10 monthly, Lite, POST /api/validate/](https://datacircle.dev/validate-email-apis/mailvalidation-io/10-monthly-lite-post-api-validate/llms.txt): $5.003 per 1,000, 33% complete, live
- [MailValidation.io, $45 monthly, Starter, POST /api/validate/](https://datacircle.dev/validate-email-apis/mailvalidation-io/45-monthly-starter-post-api-validate/llms.txt): $4.500 per 1,000, 33% complete, live
- [MailValidation.io, $80 monthly, Pro, POST /api/validate/](https://datacircle.dev/validate-email-apis/mailvalidation-io/80-monthly-pro-post-api-validate/llms.txt): $4.00 per 1,000, 33% complete, live
- [MailValidation.io, $330 monthly, Business+, POST /api/validate/](https://datacircle.dev/validate-email-apis/mailvalidation-io/330-monthly-business-post-api-validate/llms.txt): $3.30 per 1,000, 33% complete, live

## MailValidation.io's calls (2)

- `POST /api/validate/`: [MailValidation.io, free, Free, POST /api/validate/](https://datacircle.dev/validate-email-apis/mailvalidation-io/free-free-post-api-validate/llms.txt)
- `POST /a/{team_slug}/validate/api/bulk/`: [MailValidation.io, free, Free, POST /a/{team_slug}/validate/api/bulk/](https://datacircle.dev/validate-email-apis/mailvalidation-io/free-free-post-a-team-slug-validate-api-bulk/llms.txt)

## Similar plans of other providers

- [Melissa, free, Monthly Top-off, GET /V4/WEB/GlobalEmail/doGlobalEmail](https://datacircle.dev/validate-email-apis/melissa/free-monthly-top-off-get-v4-web-globalemail-doglobalemail/llms.txt): $0.00 per 1,000, 50% complete, live
- [Minelead, free](https://datacircle.dev/validate-email-apis/minelead/free/llms.txt): $0.00 per 1,000, 50% complete, live
- [Neutrino API, free, Free, GET /email-verify](https://datacircle.dev/validate-email-apis/neutrino-api/free-free-get-email-verify/llms.txt): $0.00 per 1,000, 50% complete, live
- [MyEmailVerifier, free, 100 free credits daily, GET /verifier/validate_single/{email}/{API_KEY}](https://datacircle.dev/validate-email-apis/myemailverifier/free-100-free-credits-daily-get-verifier-validate-single-email-api-key/llms.txt): $0.00 per 1,000, 33% 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 2026-10-19.

- https://app.mailvalidation.io/accounts/signup/
- https://app.mailvalidation.io/api/schema/
- https://app.mailvalidation.io/api/schema/swagger-ui/
- https://app.mailvalidation.io/docs/
- https://app.mailvalidation.io/terms/
- https://mailvalidation.io/