# StopReg, free: Email verification API

> Real-time email intelligence API to detect disposable, fake, and risky email addresses and enforce your signup policies in a single request

StopReg'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/stopreg/free
- [Best email verification API in 2026](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://stopreg.com/#pricing
- Request: `GET https://api.stopreg.com/api/v1/verify/email/{email}`
- API key: with the plan, on https://stopreg.com/#pricing
- Its API docs: https://stopreg.com/documentation.html
- Sold by: StopReg (https://stopreg.com)
- Checked: 2026-10-28

## 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: Domain Verification

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: Real-time email intelligence API to detect disposable, fake, and risky email addresses and enforce your signup policies in a single request

## Data

- Freshness: stored
- What it checks: format, mail servers, disposable domains, role addresses
- Keep data: no limit
- Use data: You agree to: Use the Services in compliance with all applicable laws and regulations, Not misuse, reverse-engineer, or disrupt the Services, Maintain the confidentiality of your API keys and account credentials [...] You may not copy, modify, or distribute our intellectual property without prior written consent

## Plan

- Pay: $0
- You get: 200 requests a month
- Enough for: 200 calls a month
- Expires: 30 days

## Rate limit

- Per second: 0.33
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email in path. Optional: x-api-token header
- Method: GET
- Path: /verify/email/{email}

## About the plan

- Plan: Free
- Who can get it: anyone

## The 28 fields the plan's answer can hold

HTTP status, message, description, email address, domain, normalized email, typo suggestion, root domain, subdomain, email provider, MX found, MX records, MX providers, disposable, relay, private domain, public provider, ISP, EDU, role address, alias, policy action, policy reason code, policy reason, risk, blocklisted, block source, allowlisted

## StopReg's plans (7)

- [StopReg, free](https://datacircle.dev/validate-email-apis/stopreg/free/llms.txt): $0.00 per 1,000, 50% complete, stored
- [StopReg, $20 monthly](https://datacircle.dev/validate-email-apis/stopreg/20-monthly/llms.txt): $0.333 per 1,000, 50% complete, stored
- [StopReg, $50 monthly](https://datacircle.dev/validate-email-apis/stopreg/50-monthly/llms.txt): $0.25 per 1,000, 50% complete, stored
- [StopReg, $100 monthly](https://datacircle.dev/validate-email-apis/stopreg/100-monthly/llms.txt): $0.20 per 1,000, 50% complete, stored
- [StopReg, $200 monthly](https://datacircle.dev/validate-email-apis/stopreg/200-monthly/llms.txt): $0.167 per 1,000, 50% complete, stored
- [StopReg, $400 monthly](https://datacircle.dev/validate-email-apis/stopreg/400-monthly/llms.txt): $0.143 per 1,000, 50% complete, stored
- [StopReg, contact us](https://datacircle.dev/validate-email-apis/stopreg/contact-us/llms.txt): 50% complete, stored

## StopReg's calls (1)

- `GET /verify/email/{email}`: [StopReg, free](https://datacircle.dev/validate-email-apis/stopreg/free/llms.txt)

## StopReg's APIs (1)

- [StopReg: email verification API pricing, 7 plans](https://datacircle.dev/validate-email-apis/stopreg/free/llms.txt)

## StopReg: 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
- [UserCheck, $500 monthly, Pro 3.5M, POST /v1/gates/{gate_id}/decisions, Decision endpoint](https://datacircle.dev/validate-email-apis/usercheck/500-monthly-pro-3-5m-post-v1-gates-gate-id-decisions-decision-endpoint/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 2026-10-28.

- https://stopreg.com
- https://stopreg.com/documentation.html
- https://stopreg.com/privacy-policy.html
- https://stopreg.com/terms.html