# ValidKit, free, POST /v1/verify: Email verification API

> Catch typos, disposable emails, and broken domains at signup before they become junk accounts, failed confirmations, or wasted onboarding steps.

ValidKit'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.
In [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt), the best plan from ValidKit scores 0.0 out of 100. ValidKit ranks 180th of 181 providers.
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/validkit/free-post-v1-verify
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://validkit.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.validkit.com/v1/verify`
- API key: with the plan, on https://validkit.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.validkit.com/?section=api-reference&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: ValidKit (https://validkit.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: Verify multiple email addresses

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Catch typos, disposable emails, and broken domains at signup before they become junk accounts, failed confirmations, or wasted onboarding steps.

## Data

- Freshness: stored
- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no limit
- Use data: You agree NOT to use the Service to: Validate email addresses for spam or unsolicited communications, Violate any applicable laws or regulations, Infringe on the privacy rights of individuals, Attempt to reverse engineer or compromise our Service, Exceed your rate limits through distributed requests, Share or resell access to the Service without permission, Use the Service for any illegal or harmful purposes

## Plan

- Pay: $0
- You get: 1,000 requests a month
- Enough for: 1,000 calls a month

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email. Optional: share_signals, debug
- Method: POST
- Path: /v1/verify

## About the plan

- Plan: Free
- Who can get it: anyone

## The 21 fields the plan's answer can hold

email address, valid, status, reason, known valid fallback, DNS fallback, reserved domain, syntax valid, DNS valid, MX valid, disposable, role, free, from pool, pool confidence, pool validations, credits earned, unique contribution, domain, email provider, did you mean

## ValidKit's plans (4)

- [ValidKit, free, POST /v1/verify](https://datacircle.dev/validate-email-apis/validkit/free-post-v1-verify/llms.txt): $0.00 per 1,000, 50% complete, stored
- [ValidKit, $20 monthly, Starter, POST /v1/verify](https://datacircle.dev/validate-email-apis/validkit/20-monthly-starter-post-v1-verify/llms.txt): $2.00 per 1,000, 50% complete, stored
- [ValidKit, $50 monthly, Growth, POST /v1/verify](https://datacircle.dev/validate-email-apis/validkit/50-monthly-growth-post-v1-verify/llms.txt): $1.00 per 1,000, 50% complete, stored
- [ValidKit, contact us, Enterprise, POST /v1/verify](https://datacircle.dev/validate-email-apis/validkit/contact-us-enterprise-post-v1-verify/llms.txt): 50% complete, stored

## ValidKit's calls (2)

- `POST /v1/verify`: [ValidKit, free, POST /v1/verify](https://datacircle.dev/validate-email-apis/validkit/free-post-v1-verify/llms.txt)
- `POST /v1/verify/batch`: [ValidKit, free, POST /v1/verify/batch](https://datacircle.dev/validate-email-apis/validkit/free-post-v1-verify-batch/llms.txt)

## ValidKit's APIs (1)

- [ValidKit: email verification API pricing, 4 plans, POST /v1/verify](https://datacircle.dev/validate-email-apis/validkit/free-post-v1-verify/llms.txt)

## ValidKit: email verification API alternatives

- [OneShot, pay as you go](https://datacircle.dev/validate-email-apis/oneshot/pay-as-you-go/llms.txt): $1.00 per 1,000, 33% complete, stored
- [Emailit, top-up from $20, Pay as you go, POST /email-verifications, Verify an address](https://datacircle.dev/validate-email-apis/emailit/top-up-from-20-pay-as-you-go-post-email-verifications-verify-an-address/llms.txt): $1.00 per 1,000, 67% complete, stored (has MX records: live)
- [apipick, $5 pack](https://datacircle.dev/validate-email-apis/apipick/5-pack/llms.txt): $1.00 per 1,000, 50% complete, stored
- [Elastic Email, $1,500 monthly, Email Marketing Pro (300,000 contacts), POST /verifications/files](https://datacircle.dev/validate-email-apis/elastic-email/1500-monthly-email-marketing-pro-300000-contacts-post-verifications-files/llms.txt): $1.00 per 1,000, 50% complete, stored

## 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://api.validkit.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://api.validkit.com/api/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.validkit.com/?section=api-reference&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.validkit.com/?section=quickstart&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.validkit.com/?section=rate-limiting&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://validkit.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://validkit.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://validkit.com/roi-calculator?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://validkit.com/sla?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://validkit.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing