# MailInput, free: Email verification API

> Prevent bounced emails and low-quality users with FREE professional-grade email verifier API

MailInput's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 3 of the 6 key fields we check: Address, Deliverability, Company.
We haven't run MailInput through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 3,753 plans for email verification APIs by price. Half the plans cost $1.98 per 1,000 emails or less.
[treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) is the cheapest paid plan per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $68.365 per 1,000 emails when no provider answers.
[Disify's $9 monthly plan (/email)](https://datacircle.dev/validate-email-apis/disify/9-monthly-starter-post-email/llms.txt) covers any number of emails. Disify's $9 monthly plan costs less up front than treg's top-up from $10.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/mailinput/free
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://mailinput.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://mailinput.com/api/v1/email-verifier/{email}`
- API key: with the plan, on https://mailinput.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://mailinput.com/api/email-verifier?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: MailInput (https://mailinput.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 50%
- Address: ✓
- Deliverability: ✓
- Company: ✓

## Price

- $ per 1,000 emails: $0.00
- Per: call
- Billing: free

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Disposable Email API

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Prevent bounced emails and low-quality users with FREE professional-grade email verifier API

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, mailbox
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0
- You get: 6,000 requests a month
- Enough for: 6,000 calls a month

## Rate limit

- Per day: 200
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: GET
- Path: /api/v1/email-verifier/{email}

## About the plan

- Plan: Free
- Who can get it: anyone

## The 14 fields the plan's answer can hold

email address, deliverable, status, regexp, disposable, catch-all, free email, role, MX records, SMTP server, SMTP check, block, username, domain

## MailInput's plans (1)

- [MailInput, free](https://datacircle.dev/validate-email-apis/mailinput/free/llms.txt): $0.00 per 1,000, 50% complete, live

## MailInput's calls (1)

- `GET /api/v1/email-verifier/{email}`: [MailInput, free](https://datacircle.dev/validate-email-apis/mailinput/free/llms.txt)

## MailInput's APIs (1)

- [MailInput: email verification API pricing, 1 plan](https://datacircle.dev/validate-email-apis/mailinput/free/llms.txt)

## MailInput: email verification API alternatives

- [MailTester Ninja, free, No token](https://datacircle.dev/validate-email-apis/mailtester-ninja/free-no-token/llms.txt): $0.00 per 1,000, 50% complete, live
- [Enrich.so, free, POST /email-validation](https://datacircle.dev/validate-email-apis/enrich-so/free/llms.txt): $0.00 per 1,000, 50% complete, live
- [GetProspect, free, POST /v2/email-verifications](https://datacircle.dev/validate-email-apis/getprospect/free-free-post-v2-email-verifications/llms.txt): $0.00 per 1,000, 50% complete, live
- [Sealch, free, POST /api/verify](https://datacircle.dev/validate-email-apis/sealch/free-free-post-api-verify/llms.txt): $0.00 per 1,000, 17% complete, live
- [Kitt AI, free](https://datacircle.dev/validate-email-apis/kitt-ai/free/llms.txt): $0.00 per 1,000, 17% 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 2026-11-02.

- https://mailinput.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://mailinput.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://mailinput.com/api/disposable-email?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://mailinput.com/api/email-verifier?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing