# Kleanmail, free: Email verification API

> Kleanmail email validation API is a simple but powerful tool that opens up a world of possibilities for your company to validate any email address.

Kleanmail's email verification API on its Free trial plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
We haven't run Kleanmail 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/kleanmail/free
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.kleanmail.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.kleanmail.com/record_verification/api_record`
- API key: with the plan, on https://www.kleanmail.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://www.kleanmail.com/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Kleanmail (https://www.kleanmail.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Kleanmail email validation API is a simple but powerful tool that opens up a world of possibilities for your company to validate any email address.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, mailbox
- Keep data: no limit
- Use data: solely for its own internal business purposes and use only [...] Customer agrees not to: license, sublicense, sell, resell, transfer, assign, distribute, provide access to, or otherwise make the Kleanmail Hosted Service available to any third party [...] Customer will not: knowingly or unknowingly use the Kleanmail Hosted Service or Provider Technology to send unsolicited email, including, without limitation, promotions, or advertisements for products or services

## Plan

- Pay: $0
- Expires: never

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: record, Content-Type header "application/json"
- Method: POST
- Path: /record_verification/api_record

## About the plan

- Plan: Free trial
- Who can get it: registered Kleanmail users, for their own internal business purposes

## The 13 fields the plan's answer can hold

email address, valid format, free email provider, disposable, catch-all, mailbox exists, greylisted, spam trap, deliverable, delivery status, error, message, status

## Kleanmail's plans (9)

- [Kleanmail, free](https://datacircle.dev/validate-email-apis/kleanmail/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [Kleanmail, top-up from $9](https://datacircle.dev/validate-email-apis/kleanmail/top-up-from-9/llms.txt): $4.50 per 1,000, 33% complete, live
- [Kleanmail, top-up from $57](https://datacircle.dev/validate-email-apis/kleanmail/top-up-from-57/llms.txt): $3.80 per 1,000, 33% complete, live
- [Kleanmail, top-up from $230](https://datacircle.dev/validate-email-apis/kleanmail/top-up-from-230/llms.txt): $2.30 per 1,000, 33% complete, live
- [Kleanmail, top-up from $240](https://datacircle.dev/validate-email-apis/kleanmail/top-up-from-240/llms.txt): $3.00 per 1,000, 33% complete, live
- [Kleanmail, top-up from $750](https://datacircle.dev/validate-email-apis/kleanmail/top-up-from-750/llms.txt): $1.50 per 1,000, 33% complete, live
- [Kleanmail, top-up from $1,100](https://datacircle.dev/validate-email-apis/kleanmail/top-up-from-1100/llms.txt): $1.10 per 1,000, 33% complete, live
- [Kleanmail, top-up from $1,600](https://datacircle.dev/validate-email-apis/kleanmail/top-up-from-1600/llms.txt): $0.80 per 1,000, 33% complete, live
- [Kleanmail, contact us](https://datacircle.dev/validate-email-apis/kleanmail/contact-us/llms.txt): 33% complete, live

## Kleanmail's calls (1)

- `POST /record_verification/api_record`: [Kleanmail, free](https://datacircle.dev/validate-email-apis/kleanmail/free/llms.txt)

## Kleanmail's APIs (1)

- [Kleanmail: email verification API pricing, 9 plans](https://datacircle.dev/validate-email-apis/kleanmail/free/llms.txt)

## Kleanmail: email verification API alternatives

- [BillionVerify, $80 pack, Professional, POST /verify/bulk](https://datacircle.dev/validate-email-apis/billionverify/80-pack-professional-post-verify-bulk/llms.txt): $0.80 per 1,000, 67% complete, live
- [Verimail, $200 pack](https://datacircle.dev/validate-email-apis/verimail/200-pack/llms.txt): $0.80 per 1,000, 50% complete, live
- [validTo, $200 monthly, 250,000 Verifications (Monthly), GET /verify](https://datacircle.dev/validate-email-apis/validto/200-monthly-250000-verifications-monthly-get-verify/llms.txt): $0.80 per 1,000, 50% complete, live
- [Zuhal, $20 monthly, Monthly: 25,000 Credits, POST /bulk/upload](https://datacircle.dev/validate-email-apis/zuhal/20-monthly-monthly-25000-credits-post-bulk-upload/llms.txt): $0.80 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 2026-11-02.

- https://www.kleanmail.com/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.kleanmail.com/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.kleanmail.com/email-validation-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.kleanmail.com/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.kleanmail.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.kleanmail.com/privacy-policy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing