# AddressZen, free: Email verification API

> Validates an email address and reports whether it is deliverable.

AddressZen's Free for 30 days plan for the email verification API costs $0.00 per 1,000 emails. We check each provider's docs for 6 fields. AddressZen's docs list 1: Deliverability.
In [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt), the best plan from AddressZen scores 39.6 out of 100. AddressZen ranks 160th of 249 providers.
This plan is free. We rank 4,721 plans for email verification APIs by price. Half the plans cost $2.00 or less per 1,000 emails. [734 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.
[PayPerQ's pay-as-you-go plan](https://datacircle.dev/validate-email-apis/payperq/pay-as-you-go-pay-per-request-with-l402-post-api-minerva-validate-emails/llms.txt) costs the least for 10,000 emails a month: $0.06.
[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.
[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/addresszen/free
- [Email validation API: best verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://addresszen.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `GET https://api.addresszen.com/v1/emails`
- API key: with the plan, on https://addresszen.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://docs.addresszen.com/docs/api/email-validation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: AddressZen (https://addresszen.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-11

## In the answer

- Completeness: 17%
- Deliverability: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: Find Address · from the same budget: Retrieve Address · Verify Address · Resolve Place · Phone Number Validation

## Not found

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

## In their words

- Their pitch: Validates an email address and reports whether it is deliverable.

## Data

- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no time limit in its terms, UPU postcode data: "You shall not: [...] Store or cache the data outside permitted systems"
- Use data: "Except to the extent expressly permitted by law or agreed in writing by IDDQD, the Client is prohibited from: re-selling (whether for free or by charging) the Service Output or Service, copying the Software Materials or any part [...], translating adapting, varying, or modifying the Software Materials or Services, disassembling, decompiling or reverse engineering the Software." "The Client may not (except to the extent expressly permitted by law or agreed in writing by IDDQD or in Third Party Contracts): use the Service to provide any software or a service which competes with the Software Materials or Service, undertake any data cleansing activities unless expressly permitted by the respective Third Party Contracts, use the Service, API data, or any content obtained through our platform to develop, train, improve, benchmark, enhance or evaluate any artificial intelligence, machine learning, or automated decision-making systems, whether directly or indirectly." "The Service and Software Materials are provided solely for the Client's own use. The Client may not resell or attempt to resell the Service Output [...] without IDDQD's express written permission." "Lookups are not transferable to third parties, nor may it be used for the benefit of third parties by the Client." "Any test balance disbursed on Your account (including Your initial free balance) may only be used for testing and evaluation purposes." US addresses: "in order to make use of the Service it must enter into a USPS Licence". UPU postcode data: "Usage is restricted to internal address validation, correction, and cleansing purposes only."

## Plan

- Pay: $0
- You get: 100 credits
- Enough for: 100 calls, once
- Expires: 30 days

## Rate limit

- Per second: 30
- Batch: 1

## Speed

- Answer: in the call
- Median: 0.23 s

## The call

- You send: query. Optional: tags
- Method: GET
- Path: /emails

## About the plan

- Plan: Free for 30 days
- Who can get it: an organisation: the terms' "Client means the organisation named as the 'Client' or 'Business' or 'Company' in the registration form"

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

result, deliverable, disposable, free, role, catch-all, suggestions

## AddressZen's plans (5)

- [AddressZen, free](https://datacircle.dev/validate-email-apis/addresszen/free/llms.txt): $0.00 per 1,000, 17% complete
- [AddressZen, $49 pack](https://datacircle.dev/validate-email-apis/addresszen/49-pack/llms.txt): $35.00 per 1,000, 17% complete
- [AddressZen, $149 pack](https://datacircle.dev/validate-email-apis/addresszen/149-pack/llms.txt): $29.80 per 1,000, 17% complete
- [AddressZen, $349 pack](https://datacircle.dev/validate-email-apis/addresszen/349-pack/llms.txt): $24.929 per 1,000, 17% complete
- [AddressZen, $1,000 pack](https://datacircle.dev/validate-email-apis/addresszen/1000-pack/llms.txt): $18.182 per 1,000, 17% complete

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

- `GET /emails`: [AddressZen, free](https://datacircle.dev/validate-email-apis/addresszen/free/llms.txt)

## AddressZen's APIs (2)

- [AddressZen Email verification API pricing, 5 plans](https://datacircle.dev/validate-email-apis/addresszen/free/llms.txt)
- [AddressZen Phone validation API pricing, 5 plans](https://datacircle.dev/validate-phone-apis/addresszen/free/llms.txt)

## AddressZen: email verification API alternatives

[AddressZen alternatives: every email verification API provider ranked](https://datacircle.dev/addresszen-alternatives.txt)

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

- [AddressZen, $1,000 pack](https://datacircle.dev/validate-email-apis/addresszen/1000-pack/llms.txt): $18.182 per 1,000, 17% complete
- [Clearout, $360 monthly, Pro 100K Credits, POST /email_verify/instant, Instant Verify, full](https://datacircle.dev/validate-email-apis/clearout/360-monthly-pro-100k-credits-post-email-verify-instant-instant-verify-full/llms.txt): $18.00 per 1,000, 50% complete, live
- [ListPlus, $60 pack](https://datacircle.dev/validate-email-apis/listplus/60-pack/llms.txt): $18.00 per 1,000, 33% complete
- [FindLeadEmails, $9 pack](https://datacircle.dev/validate-email-apis/findleademails/9-pack/llms.txt): $18.00 per 1,000, 33% complete, live
- [HiProspect, £205 monthly](https://datacircle.dev/validate-email-apis/hiprospect/205-monthly/llms.txt): $18.224 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://addresszen.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://addresszen.com/guides/what-is-a-lookup?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://addresszen.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.addresszen.com/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.addresszen.com/docs/api/api-reference?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.addresszen.com/docs/api/email-validation?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.addresszen.com/docs/cli/email.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://docs.addresszen.com/docs/sdks/python/endpoints/email-validation.md?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://openapi.addresszen.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://terms.addresszen.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://terms.addresszen.com/extended-terms-of-service/payg-lookup-licence?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://terms.addresszen.com/third-party-licences/UPU?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://terms.addresszen.com/third-party-licences/usps?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing