# APILayer, free, GET /check: Email verification API

> Mailboxlayer is a simple and powerful REST API that offers instant email address validation and verification.

APILayer'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.
We rank 2,467 plans by price. [treg's top-up from $10](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) costs the least per 1,000 emails: $0.00 on average. treg asks one provider after another until one answers. You pay $26.95 per 1,000 emails when no provider answers.
[Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/149-monthly/llms.txt), [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) and [treg](https://datacircle.dev/validate-email-apis/treg/top-up-from-10/llms.txt) are the best email verification API providers in our benchmark.

- This page: https://datacircle.dev/validate-email-apis/apilayer/free-free
- [Best email verification API in 2026](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://apilayer.com/products/mailboxlayer
- Request: `GET https://api.apilayer.net/mailboxlayer/api/check`, Single Email Validation
- API key: with the plan, on https://apilayer.com/products/mailboxlayer
- Its API docs: https://docs.apilayer.com/apilayer/docs/mailboxlayer#single-email-validation
- Sold by: APILayer (https://apilayer.com)
- Checked: 2026-10-26

## 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: nothing else

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Mailboxlayer is a simple and powerful REST API that offers instant email address validation and verification.

## Data

- Freshness: live
- Keep data: You shall not: [...] use, store, or access any mailboxlayer API Data & Services, or the mailboxlayer API after the termination of this Agreement, You do not permit Your end users to store [...] mailboxlayer API Data & Services for any other purposes
- Use data: You are hereby permitted to receive, process, and display mailboxlayer API Data & Services to individual end-users of your application(s), provided such end users use mailboxlayer API Data & Services strictly for their own personal use, You do not permit Your end users to store, distribute, or otherwise exploit mailboxlayer API Data & Services for any other purposes. [...] You are permitted solely to use mailboxlayer API Data & Services for reference by Your end users. Except as expressly provided herein, under no circumstances whatsoever may You transfer or permit the transfer of mailboxlayer API Data & Services outside of your application(s). [...] You shall not: reproduce, copy, modify, distribute, market, display, transfer, sublicense, assign, prepare derivative work(s) or adaptation(s) based on, sell, exchange, barter or transfer, rent, lease, loan, time-share, resell, or in any other manner exploit mailboxlayer API Data & Services or the mailboxlayer API, make access to mailboxlayer API Data & Services or the mailboxlayer API available to unauthorized parties, or otherwise post or distribute mailboxlayer API Data & Services in any public forum including, but not limited to, print, newsletters, radio, television, or internet, [...] use or permit others to use, market, distribute, or export mailboxlayer API Data & Services, or the mailboxlayer API, or, use mailboxlayer API Data & Services or the mailboxlayer API in any manner or for any purpose that violates any law, regulation or right of any person. [...] You also agree not to: [...] redistribute any Information And Content in any manner whatsoever [...] to any person, organization, corporation or other entity, including within your own organization or externally, except for the limited Permitted Uses, [...] present, archive, cache, frame, scrape, or mirror any Information And Content from any part of the Services within another web site, except with express written permission [...], [...] embed or import any data provided in, on or through the Services into any information services (whether or not web-based), data files, or application software, including without limitation accounting and payroll systems, except as specifically permitted in writing by apilayer.

## Plan

- Pay: $0
- You get: 100 requests
- Enough for: 100 calls

## Rate limit

- Batch: 1

## Speed

- Answer: in the call
- Median: 1.85 s

## The call

- You send: email
- Method: GET
- Path: /check

## About the plan

- Plan: Free
- Who can get it: anyone

## The 12 fields the plan's answer can hold

email, did you mean, local part, domain, syntax valid, MX found, SMTP check passed, catch-all, role address, disposable, free email, score

## APILayer's plans (12)

- [APILayer, free, GET /check](https://datacircle.dev/validate-email-apis/apilayer/free-free/llms.txt): $0.00 per 1,000, 67% complete, live
- [APILayer, free plan](https://datacircle.dev/validate-email-apis/apilayer/free/llms.txt): $0.00 per 1,000, 67% complete, live
- [APILayer, $14.99 monthly](https://datacircle.dev/validate-email-apis/apilayer/14-99-monthly/llms.txt): $2.998 per 1,000, 67% complete, live
- [APILayer, $74.99 monthly, Professional, GET /check](https://datacircle.dev/validate-email-apis/apilayer/74-99-monthly-professional-get-check/llms.txt): $1.50 per 1,000, 67% complete, live
- [APILayer, $74.99 monthly, Professional Plus Plan, GET /bulk_check](https://datacircle.dev/validate-email-apis/apilayer/74-99-monthly-professional-plus-plan-get-bulk-check/llms.txt): 67% complete, live
- [APILayer, $249.99 monthly, Enterprise, GET /check](https://datacircle.dev/validate-email-apis/apilayer/249-99-monthly-enterprise-get-check/llms.txt): 67% complete, live
- [APILayer, $249.99 monthly, Enterprise Plus Plan, GET /bulk_check](https://datacircle.dev/validate-email-apis/apilayer/249-99-monthly-enterprise-plus-plan-get-bulk-check/llms.txt): 67% complete, live
- [APILayer, $161.99 yearly](https://datacircle.dev/validate-email-apis/apilayer/161-99-yearly/llms.txt): $2.70 per 1,000, 67% complete, live
- [APILayer, $787.99 yearly, Professional Plus Plan, GET /bulk_check](https://datacircle.dev/validate-email-apis/apilayer/787-99-yearly-professional-plus-plan-get-bulk-check/llms.txt): 67% complete, live
- [APILayer, $2,549.99 yearly, Enterprise Plus Plan, GET /bulk_check](https://datacircle.dev/validate-email-apis/apilayer/2549-99-yearly-enterprise-plus-plan-get-bulk-check/llms.txt): 67% complete, live
- [APILayer, contact us, Custom](https://datacircle.dev/validate-email-apis/apilayer/contact-us-custom/llms.txt): 67% complete, live
- [APILayer, contact us, Custom Plan](https://datacircle.dev/validate-email-apis/apilayer/contact-us/llms.txt): 67% complete, live

## APILayer's calls for this API (4)

- `GET /check`, Single Email Validation: [APILayer, free, GET /check](https://datacircle.dev/validate-email-apis/apilayer/free-free/llms.txt)
- `GET /check`, Validate: [APILayer, free plan](https://datacircle.dev/validate-email-apis/apilayer/free/llms.txt)
- `GET /bulk_check`, Bulk Email Validation: [APILayer, $74.99 monthly, Professional, GET /bulk_check](https://datacircle.dev/validate-email-apis/apilayer/74-99-monthly-professional-get-bulk-check/llms.txt)
- `GET /bulk_check`, Bulk Validate: [APILayer, $74.99 monthly, Professional Plus Plan, GET /bulk_check](https://datacircle.dev/validate-email-apis/apilayer/74-99-monthly-professional-plus-plan-get-bulk-check/llms.txt)

## APILayer's APIs (2)

- [APILayer: phone validation API pricing, 13 plans](https://datacircle.dev/validate-phone-apis/apilayer/free-plan/llms.txt)
- [APILayer: email verification API pricing, 12 plans](https://datacircle.dev/validate-email-apis/apilayer/free-free/llms.txt)

## APILayer: email verification API alternatives

- [Sealch, $15 pack, Pay as you go 10,000 emails, POST /api/verify](https://datacircle.dev/validate-email-apis/sealch/15-pack-pay-as-you-go-10000-emails-post-api-verify/llms.txt): $1.50 per 1,000, 17% complete, live
- [Verimail, $15 monthly](https://datacircle.dev/validate-email-apis/verimail/15-monthly/llms.txt): $1.50 per 1,000, 50% complete, live
- [DeBounce, top-up from $75, 50K credits, GET /v1/, Single email validation](https://datacircle.dev/validate-email-apis/debounce/top-up-from-75-50k-credits-get-v1/llms.txt): $1.50 per 1,000, 50% complete, live
- [Mailerio, $150 monthly, Monthly 100,000 emails, GET /v{version}/validate](https://datacircle.dev/validate-email-apis/mailerio/150-monthly-monthly-100000-emails-get-v-version-validate/llms.txt): $1.50 per 1,000, 67% 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 2026-10-26.

- https://apilayer.com/llms.txt
- https://apilayer.com/products/mailboxlayer
- https://docs.apilayer.com/apilayer/docs/mailboxlayer
- https://mailboxlayer.com/permitted-prohibited-use
- https://mailboxlayer.com/terms
- https://www.ideracorp.com/Legal/APILayer/Marketplace-Terms-of-Use