# StopBouncing, free: Email verification API

> Add real-time email verification to any app with a single GET request. Bearer token authentication, predictable JSON responses, and credits from €0.0006 per verification.

StopBouncing's email verification API on its 100 free verifications plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
We rank 3,215 plans by price. [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.
[MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt), [Enrich.so](https://datacircle.dev/validate-email-apis/enrich-so/499-monthly/llms.txt) and [GetProspect](https://datacircle.dev/validate-email-apis/getprospect/369-pack/llms.txt) are the best email verification API providers in our benchmark.

- This page: https://datacircle.dev/validate-email-apis/stopbouncing/free
- [Best email verification API in 2026: providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.stopbouncing.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://www.stopbouncing.com/api/v1/verify`
- API key: with the plan, on https://www.stopbouncing.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://www.stopbouncing.com/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: StopBouncing (https://www.stopbouncing.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-02

## In the answer

- Completeness: 33%
- Address: ✓
- Deliverability: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: nothing else

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Add real-time email verification to any app with a single GET request. Bearer token authentication, predictable JSON responses, and credits from €0.0006 per verification.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: You may use the Service only for lawful purposes. You must not: Upload lists obtained without the knowledge or consent of the address holders where required by law. Use verification results to send unsolicited commercial email (spam). Attempt to reverse-engineer, scrape, or overload the Service or its underlying API. Resell or redistribute access to the Service without a written reseller agreement. Use the Service in any way that violates applicable law, including GDPR and the CAN-SPAM Act. [...] You must not use StopBouncing to: Resell, sublicense, or redistribute StopBouncing services or verification results to third parties without our prior written consent.

## Plan

- Pay: €0
- You get: 100 credits
- Enough for: 100 calls, once
- Expires: never

## Rate limit

- Per second: 1
- Batch: 1

## Speed

- Answer: in the call

## The call

- You send: email
- Method: POST
- Path: /verify

## About the plan

- Plan: 100 free verifications
- Who can get it: anyone who verifies their email address

## The 3 fields the plan's answer can hold

email address, status, credits remaining

## StopBouncing's plans (8)

- [StopBouncing, free](https://datacircle.dev/validate-email-apis/stopbouncing/free/llms.txt): $0.00 per 1,000, 33% complete, live
- [StopBouncing, €18 pack](https://datacircle.dev/validate-email-apis/stopbouncing/18-pack/llms.txt): $2.026 per 1,000, 33% complete, live
- [StopBouncing, €35 pack](https://datacircle.dev/validate-email-apis/stopbouncing/35-pack/llms.txt): $1.575 per 1,000, 33% complete, live
- [StopBouncing, €52 pack](https://datacircle.dev/validate-email-apis/stopbouncing/52-pack/llms.txt): $1.17 per 1,000, 33% complete, live
- [StopBouncing, €99 pack](https://datacircle.dev/validate-email-apis/stopbouncing/99-pack/llms.txt): $1.114 per 1,000, 33% complete, live
- [StopBouncing, €180 pack](https://datacircle.dev/validate-email-apis/stopbouncing/180-pack/llms.txt): $0.81 per 1,000, 33% complete, live
- [StopBouncing, €600 pack](https://datacircle.dev/validate-email-apis/stopbouncing/600-pack/llms.txt): $0.675 per 1,000, 33% complete, live
- [StopBouncing, contact us](https://datacircle.dev/validate-email-apis/stopbouncing/contact-us/llms.txt): 33% complete, live

## StopBouncing's calls (1)

- `POST /verify`: [StopBouncing, free](https://datacircle.dev/validate-email-apis/stopbouncing/free/llms.txt)

## StopBouncing's APIs (1)

- [StopBouncing: email verification API pricing, 8 plans](https://datacircle.dev/validate-email-apis/stopbouncing/free/llms.txt)

## StopBouncing: email verification API alternatives

- [No2Bounce, $8,148 yearly](https://datacircle.dev/validate-email-apis/no2bounce/8148-yearly/llms.txt): $0.679 per 1,000, 0% complete, live
- [Valid Email Checker, $690 pack, 1,015,000 credits, POST /verify-bulk](https://datacircle.dev/validate-email-apis/valid-email-checker/690-pack-1015000-credits-post-verify-bulk/llms.txt): $0.68 per 1,000, 67% complete, live
- [SafetyMails, $1,360 monthly](https://datacircle.dev/validate-email-apis/safetymails/1360-monthly/llms.txt): $0.68 per 1,000, 33% complete, live
- [Giggal, $680 pack, 1,000,000 credits, POST /v1/verify-batch](https://datacircle.dev/validate-email-apis/giggal/680-pack-1000000-credits-post-v1-verify-batch/llms.txt): $0.68 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 2026-11-02.

- https://www.stopbouncing.com/api-docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.stopbouncing.com/email-verification-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.stopbouncing.com/faq?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.stopbouncing.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.stopbouncing.com/refund-policy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.stopbouncing.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing