# LookTwice, free: Email verification API

> Catch broken, disposable, role-based, and free-provider addresses before they pollute your workflow.

LookTwice's Free plan for the email verification API costs $0.00 per 1,000 emails. We check each provider's docs for 6 fields. LookTwice's docs list 2: Address, Deliverability.
We haven't run LookTwice 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/looktwice/free
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://looktwice.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.looktwice.dev/v1/email/check`
- API key: with the plan, on https://looktwice.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://looktwice.dev/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: LookTwice (https://looktwice.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

- Also pays for: from the same budget: VAT Check · IBAN Check · CPSC Recall Match · Knowledge Watch

## Not found

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

## In their words

- Their pitch: Catch broken, disposable, role-based, and free-provider addresses before they pollute your workflow.

## Data

- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no limit
- Use data: You must comply with the LookTwice Acceptable Use Policy and applicable law. You may not interfere with the Service, bypass usage or security controls, access private networks, resell access to the Service as a standalone competing API, or use results to make prohibited high-impact decisions. [...] You may use LookTwice inside your own product or workflow, but may not sublicense API keys, sell raw access to the Service, pool allowances between unrelated customers, or reproduce LookTwice as a standalone competing API without written permission. [...] Do not use LookTwice for spam, harassment, stalking, surveillance, skip tracing, unlawful discrimination, credential attacks, malware, security exploitation, sanctions evasion, or decisions about employment, housing, credit, insurance, medical treatment, or other high-impact rights.

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: 50 calls a month
- Expires: the allowance refreshes every month

## Rate limit

- Per second: 0.5 (30 a minute)
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email, Idempotency-Key header, Content-Type header "application/json"
- Method: POST
- Path: /v1/email/check

## About the plan

- Plan: Free
- Who can get it: anyone legally able to enter into a contract

## The 7 fields the plan's answer can hold

syntax, mail exchange, address type, mailbox status, source, check time, request evidence

## LookTwice's plans (4)

- [LookTwice, free](https://datacircle.dev/validate-email-apis/looktwice/free/llms.txt): $0.00 per 1,000, 33% complete
- [LookTwice, $49 monthly](https://datacircle.dev/validate-email-apis/looktwice/49-monthly/llms.txt): $17.818 per 1,000, 33% complete
- [LookTwice, $199 monthly](https://datacircle.dev/validate-email-apis/looktwice/199-monthly/llms.txt): $16.583 per 1,000, 33% complete
- [LookTwice, $499 monthly](https://datacircle.dev/validate-email-apis/looktwice/499-monthly/llms.txt): $15.354 per 1,000, 33% complete

## LookTwice's calls for this API (1)

- `POST /v1/email/check`: [LookTwice, free](https://datacircle.dev/validate-email-apis/looktwice/free/llms.txt)

## LookTwice's APIs (2)

- [LookTwice Business verification API pricing, 4 plans](https://datacircle.dev/business-verification-apis/looktwice/free/llms.txt)
- [LookTwice Email verification API pricing, 4 plans](https://datacircle.dev/validate-email-apis/looktwice/free/llms.txt)

## LookTwice: email verification API alternatives

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

We list LookTwice's cheapest paid plan first. Next we list other providers' plans closest to LookTwice in price per 1,000 emails.

- [LookTwice, $499 monthly](https://datacircle.dev/validate-email-apis/looktwice/499-monthly/llms.txt): $15.354 per 1,000, 33% complete
- [SendPulse, $182.40 yearly, Subscription 1,000, Yearly, POST /verifier-service/send-list-to-verify/](https://datacircle.dev/validate-email-apis/sendpulse/182-40-yearly-subscription-1000-yearly-post-verifier-service-send-list-to-verify/llms.txt): $15.20 per 1,000, 33% complete
- [OrigoID, MX$56,000 monthly](https://datacircle.dev/validate-email-apis/origoid/mx-56000-monthly/llms.txt): $15.231 per 1,000, 67% complete
- [IPQualityScore, $1,149.99 monthly](https://datacircle.dev/validate-email-apis/ipqualityscore/1149-99-monthly/llms.txt): $15.333 per 1,000, 67% complete, live
- [Sparkle, $29 monthly, Starter, POST /email-verifier/bulk/clever](https://datacircle.dev/validate-email-apis/sparkle/29-monthly-starter-post-email-verifier-bulk-clever/llms.txt): $15.467 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 2026-11-11.

- https://looktwice.dev?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://looktwice.dev/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://looktwice.dev/legal/acceptable-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://looktwice.dev/legal/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://looktwice.dev/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing