# Sendkit, free: Email verification API

> Your AI agent can validate every email address before you send. Catch disposable domains, invalid addresses, and bad MX records before they hurt your deliverability.

Sendkit's Free plan for the email verification API costs $0.00 per 1,000 emails. We check each provider's docs for 6 fields. Sendkit's docs list 2: Address, Deliverability.
We haven't run Sendkit through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
This plan is free. We rank 4,767 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. [728 email verification API plans on our price sheet are free.](https://datacircle.dev/best-email-verification-api.txt) [pingutil's free plan](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) scores highest of the free plans in our benchmark, at 82.3 out of 100.
[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. [StableEnrich's pay-as-you-go plan](https://datacircle.dev/validate-email-apis/stableenrich/pay-as-you-go-pay-per-request-with-x402-or-mpp-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.05.
[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, and costs less up front than treg's top-up from $10.
[Validemail.co](https://datacircle.dev/validate-email-apis/validemail-co/9-90-monthly-9-90-month-get-api-v1-validate/llms.txt), [pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) and [looot](https://datacircle.dev/validate-email-apis/looot/top-up/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/sendkit/free
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://sendkit.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.sendkit.dev/emails/validate`
- API key: with the plan, on https://sendkit.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.sendkit.dev/api-reference/endpoint/validate-email?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Sendkit (https://sendkit.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-11

## In the answer

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

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Repeat free: 90 days
- Also pays for: Send email

## Not found

- $ per 1,000 calls that find nothing: $0.00

## In their words

- Their pitch: Your AI agent can validate every email address before you send. Catch disposable domains, invalid addresses, and bad MX records before they hurt your deliverability.

## Data

- Freshness: 180 days
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no API terms
- Use data: no API terms

## Plan

- Pay: $0

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: POST
- Path: /emails/validate

## About the plan

- Plan: Free
- Who can get it: anyone at least 18 years old or duly authorized by a legal guardian, individual or legal entity

## The 11 fields the plan's answer can hold

email, valid, valid syntax, valid DNS, mailbox exists, role address, disposable, random input, should block, block reason, validated at

## Sendkit's plans (25)

- [Sendkit, free](https://datacircle.dev/validate-email-apis/sendkit/free/llms.txt): $0.00 per 1,000, 33% complete, 180 days
- [Sendkit, $15 monthly](https://datacircle.dev/validate-email-apis/sendkit/15-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $25 monthly](https://datacircle.dev/validate-email-apis/sendkit/25-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $30 monthly](https://datacircle.dev/validate-email-apis/sendkit/30-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $45 monthly](https://datacircle.dev/validate-email-apis/sendkit/45-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $50 monthly](https://datacircle.dev/validate-email-apis/sendkit/50-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $60 monthly](https://datacircle.dev/validate-email-apis/sendkit/60-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $75 monthly](https://datacircle.dev/validate-email-apis/sendkit/75-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $80 monthly](https://datacircle.dev/validate-email-apis/sendkit/80-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $100 monthly, Marketing 75K](https://datacircle.dev/validate-email-apis/sendkit/100-monthly-marketing-75k/llms.txt): 33% complete, 180 days
- [Sendkit, $100 monthly, Transactional 150K](https://datacircle.dev/validate-email-apis/sendkit/100-monthly-transactional-150k/llms.txt): 33% complete, 180 days
- [Sendkit, $130 monthly](https://datacircle.dev/validate-email-apis/sendkit/130-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $150 monthly](https://datacircle.dev/validate-email-apis/sendkit/150-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $170 monthly](https://datacircle.dev/validate-email-apis/sendkit/170-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $250 monthly, Marketing 250K](https://datacircle.dev/validate-email-apis/sendkit/250-monthly-marketing-250k/llms.txt): 33% complete, 180 days
- [Sendkit, $250 monthly, Transactional 500K](https://datacircle.dev/validate-email-apis/sendkit/250-monthly-transactional-500k/llms.txt): 33% complete, 180 days
- [Sendkit, $350 monthly](https://datacircle.dev/validate-email-apis/sendkit/350-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $400 monthly](https://datacircle.dev/validate-email-apis/sendkit/400-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $450 monthly](https://datacircle.dev/validate-email-apis/sendkit/450-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $550 monthly](https://datacircle.dev/validate-email-apis/sendkit/550-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $700 monthly](https://datacircle.dev/validate-email-apis/sendkit/700-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $750 monthly](https://datacircle.dev/validate-email-apis/sendkit/750-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $1,150 monthly](https://datacircle.dev/validate-email-apis/sendkit/1150-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $1,500 monthly](https://datacircle.dev/validate-email-apis/sendkit/1500-monthly/llms.txt): 33% complete, 180 days
- [Sendkit, $2,250 monthly](https://datacircle.dev/validate-email-apis/sendkit/2250-monthly/llms.txt): 33% complete, 180 days

## Sendkit's calls (1)

- `POST /emails/validate`: [Sendkit, free](https://datacircle.dev/validate-email-apis/sendkit/free/llms.txt)

## Sendkit's APIs (1)

- [Sendkit Email verification API pricing, 25 plans](https://datacircle.dev/validate-email-apis/sendkit/free/llms.txt)

## Sendkit: email verification API alternatives

[Sendkit alternatives: other email verification API providers by price](https://datacircle.dev/sendkit-alternatives.txt)

We list other providers' plans closest to this plan in price per 1,000 emails. Each plan in the list gives live data or data at most a year old.

- [Validemail.co, free, POST /api/v1/bulk](https://datacircle.dev/validate-email-apis/validemail-co/free-post-api-v1-bulk/llms.txt): $0.00 per 1,000, 67% complete, live
- [pingutil, free API key, POST /v1/verify](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt): $0.00 per 1,000, 50% complete, 30 days
- [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
- [Giggal, free trial, POST /v1/verify-batch](https://datacircle.dev/validate-email-apis/giggal/free-trial-post-v1-verify-batch/llms.txt): $0.00 per 1,000, 67% complete, live
- [Lordevo, free](https://datacircle.dev/validate-email-apis/lordevo/free/llms.txt): $0.00 per 1,000, 33% complete, 10 minutes

## Sources

From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-11.

- https://docs.sendkit.dev/api-reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.sendkit.dev/api-reference/endpoint/validate-email.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.sendkit.dev/knowledge-base/email-validation.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendkit.dev/en/email-validations/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendkit.dev/en/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendkit.dev/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sendkit.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing