# ListCheckup, free, GET /v1/verify: Email verification API

> Check one address, or a list of any size, from your own code. Same credits as the dashboard, same verdicts.

ListCheckup's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 4 of the 6 key fields we check: Address, Deliverability, Confidence, Company.
In [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt), the best plan from ListCheckup scores 51.9 out of 100. ListCheckup ranks 65th of 189 providers.
This plan is free. We rank 3,886 plans for email verification APIs by price. Half the plans cost $1.998 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.
[email-validation.org](https://datacircle.dev/validate-email-apis/email-validation-org/450-pack-1000000-credits-post-v1-validate/llms.txt), [pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) and [MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/listcheckup/free-get-v1-verify
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://listcheckup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://listcheckup.com/v1/verify`
- API key: with the plan, on https://listcheckup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://listcheckup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: ListCheckup (https://listcheckup.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-05

## In the answer

- Completeness: 67%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓
- Company: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Verify a list

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Check one address, or a list of any size, from your own code. Same credits as the dashboard, same verdicts.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: You may not use the Service to: verify addresses you obtained without a lawful basis, including scraped or purchased lists you have no right to process, support the sending of unsolicited bulk email, or any activity that violates anti-spam law in the recipient's jurisdiction, enumerate, guess, or harvest addresses, including submitting generated permutations of a domain's addresses, circumvent credit limits, rate limits, or authentication, or resell the Service without a written agreement, interfere with the Service or attempt to gain unauthorised access to it.

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: 100 calls a month
- Expires: never

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call
- Median: 0.58 s

## The call

- You send: email
- Method: GET
- Path: /v1/verify

## About the plan

- Plan: Free
- Who can get it: anyone

## The 8 fields the plan's answer can hold

email address, normalized email address, local part, domain, status, reason, confidence score, duration

## ListCheckup's plans (6)

- [ListCheckup, free, GET /v1/verify](https://datacircle.dev/validate-email-apis/listcheckup/free-get-v1-verify/llms.txt): $0.00 per 1,000, 67% complete, live
- [ListCheckup, €5 pack, Trial, GET /v1/verify](https://datacircle.dev/validate-email-apis/listcheckup/5-pack-trial-get-v1-verify/llms.txt): $5.627 per 1,000, 67% complete, live
- [ListCheckup, €19 pack, Starter, GET /v1/verify](https://datacircle.dev/validate-email-apis/listcheckup/19-pack-starter-get-v1-verify/llms.txt): $4.276 per 1,000, 67% complete, live
- [ListCheckup, €55 pack, Growth, GET /v1/verify](https://datacircle.dev/validate-email-apis/listcheckup/55-pack-growth-get-v1-verify/llms.txt): $2.476 per 1,000, 67% complete, live
- [ListCheckup, €149 pack, Scale, GET /v1/verify](https://datacircle.dev/validate-email-apis/listcheckup/149-pack-scale-get-v1-verify/llms.txt): $1.677 per 1,000, 67% complete, live
- [ListCheckup, contact us, More than 100,000, GET /v1/verify](https://datacircle.dev/validate-email-apis/listcheckup/contact-us-more-than-100000-get-v1-verify/llms.txt): 67% complete, live

## ListCheckup's calls (2)

- `POST /v1/lists`: [ListCheckup, free, POST /v1/lists](https://datacircle.dev/validate-email-apis/listcheckup/free-post-v1-lists/llms.txt)
- `GET /v1/verify`: [ListCheckup, free, GET /v1/verify](https://datacircle.dev/validate-email-apis/listcheckup/free-get-v1-verify/llms.txt)

## ListCheckup's APIs (1)

- [ListCheckup: email verification API pricing, 6 plans, GET /v1/verify](https://datacircle.dev/validate-email-apis/listcheckup/free-get-v1-verify/llms.txt)

## ListCheckup: email verification API alternatives

- [WhoisXML API, $2,999 monthly](https://datacircle.dev/validate-email-apis/whoisxml-api/2999-monthly/llms.txt): $1.674 per 1,000, 50% complete, live
- [Enrow, $6,444 yearly, Scale, POST /email/verify/bulk](https://datacircle.dev/validate-email-apis/enrow/6444-yearly-scale-post-email-verify-bulk/llms.txt): $1.678 per 1,000, 33% complete, live
- [EmailMarker, $84 pack, 50,000 credits, POST /api/upload](https://datacircle.dev/validate-email-apis/emailmarker/84-pack-50000-credits-post-api-upload/llms.txt): $1.68 per 1,000, 17% complete, live
- [EmailListVerify, $168 monthly, 100,000 credits, POST /api/verifyApiFile](https://datacircle.dev/validate-email-apis/emaillistverify/168-monthly-100000-credits-post-api-verifyapifile/llms.txt): $1.68 per 1,000, 50% 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 2026-11-05.

- https://listcheckup.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://listcheckup.com/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://listcheckup.com/features?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://listcheckup.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://listcheckup.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing