# UserCheck, free: Email verification API

> Check new signups, existing users, and imported lists with one API call that returns every signal you need, including disposable email detection that catches domains public blocklists miss.

UserCheck'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.
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/usercheck/free
- [Best email verification API in 2026](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.usercheck.com/#pricing
- Request: `GET https://api.usercheck.com/email/{email}`
- API key: with the plan, on https://www.usercheck.com/#pricing
- Its API docs: https://www.usercheck.com/docs/api/email-endpoint
- Sold by: UserCheck (https://www.usercheck.com)
- Checked: 2026-10-23

## 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: Domain endpoint

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Check new signups, existing users, and imported lists with one API call that returns every signal you need, including disposable email detection that catches domains public blocklists miss.

## Data

- Freshness: stored
- Keep data: no limit
- Use data: You may not use our Services: For unlawful purposes, To support spam or fraud, To damage or impair our services, In violation of any applicable laws. You may not resell, sublicense, share, or redistribute UserCheck data or API results to third parties without our written agreement. This includes incorporating our data into products or services used by others.

## Plan

- Pay: $0
- You get: 1,000 credits a month
- Enough for: 1,000 calls a month
- Expires: at the start of each billing cycle, unused credits do not roll over

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email. Optional: include_mx
- Method: GET
- Path: /email/{email}

## About the plan

- Plan: Free
- Who can get it: anyone aged 16 or over, or the age of consent in their jurisdiction

## The 18 fields the plan's answer can hold

status code, email address, normalized email address, domain, domain age in days, has MX records, MX records, MX providers, SPF posture, DMARC policy, disposable, public domain, relay domain, free subdomain, alias, role account, spam, did you mean

## UserCheck's plans (6)

- [UserCheck, free](https://datacircle.dev/validate-email-apis/usercheck/free/llms.txt): $0.00 per 1,000, 50% complete, stored
- [UserCheck, $50 monthly, Pro 200k, GET /email/{email}](https://datacircle.dev/validate-email-apis/usercheck/50-monthly-pro-200k-get-email-email/llms.txt): $0.25 per 1,000, 50% complete, stored
- [UserCheck, $100 monthly, Pro 500k, GET /email/{email}](https://datacircle.dev/validate-email-apis/usercheck/100-monthly-pro-500k-get-email-email/llms.txt): $0.20 per 1,000, 50% complete, stored
- [UserCheck, $250 monthly, Pro 1.5M, GET /email/{email}](https://datacircle.dev/validate-email-apis/usercheck/250-monthly-pro-1-5m-get-email-email/llms.txt): $0.167 per 1,000, 50% complete, stored
- [UserCheck, $500 monthly, Pro 3.5M, GET /email/{email}](https://datacircle.dev/validate-email-apis/usercheck/500-monthly-pro-3-5m-get-email-email/llms.txt): $0.143 per 1,000, 50% complete, stored
- [UserCheck, contact us, Enterprise, GET /email/{email}](https://datacircle.dev/validate-email-apis/usercheck/contact-us-enterprise-get-email-email/llms.txt): 50% complete, stored

## UserCheck's calls (3)

- `GET /email/{email}`: [UserCheck, free](https://datacircle.dev/validate-email-apis/usercheck/free/llms.txt)
- `POST /v1/gates/{gate_id}/decisions`, Decision endpoint: [UserCheck, $50 monthly, Pro 200k, POST /v1/gates/{gate_id}/decisions, Decision endpoint](https://datacircle.dev/validate-email-apis/usercheck/50-monthly-pro-200k-post-v1-gates-gate-id-decisions-decision-endpoint/llms.txt)
- `POST /v1/gates/{gate_id}/decisions`, Decision endpoint, full: [UserCheck, $50 monthly, Pro 200k, POST /v1/gates/{gate_id}/decisions, Decision endpoint, full](https://datacircle.dev/validate-email-apis/usercheck/50-monthly-pro-200k-post-v1-gates-gate-id-decisions-decision-endpoint-full/llms.txt)

## UserCheck's APIs (1)

- [UserCheck: email verification API pricing, 6 plans](https://datacircle.dev/validate-email-apis/usercheck/free/llms.txt)

## UserCheck: email verification API alternatives

- [IP-API.io, €10 monthly, Small, GET /api/v1/email/{email}](https://datacircle.dev/validate-email-apis/ip-api-io/10-monthly-small-get-api-v1-email-email/llms.txt): $0.113 per 1,000, 50% complete, stored
- [Antideo, $10 monthly](https://datacircle.dev/validate-email-apis/antideo/10-monthly/llms.txt): $0.139 per 1,000, 33% complete, stored
- [StopReg, $400 monthly](https://datacircle.dev/validate-email-apis/stopreg/400-monthly/llms.txt): $0.143 per 1,000, 50% complete, stored
- [Elastic Email, $1,099 monthly, Email API Pro (7,500,000 emails/month), POST /verifications/files](https://datacircle.dev/validate-email-apis/elastic-email/1099-monthly-email-api-pro-7500000-emails-month-post-verifications-files/llms.txt): $0.146 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 2026-10-23.

- https://www.usercheck.com/
- https://www.usercheck.com/docs/api/authentication.md
- https://www.usercheck.com/docs/api/email-endpoint.md
- https://www.usercheck.com/docs/api/rate-limits.md
- https://www.usercheck.com/docs/gates/overview.md
- https://www.usercheck.com/docs/get-started/credits.md
- https://www.usercheck.com/legal/terms.md