# Bouncebuster, free, POST /verify: Email verification API

> Verify a single address or millions. Authenticate with a Bearer key, get JSON back. The same account powers our command-line tool and a Model Context Protocol server for AI agents.

Bouncebuster'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, Confidence.
In [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt), the best plan from Bouncebuster scores 0.0 out of 100. Bouncebuster ranks 145th of 189 providers.
This plan is free. We rank 3,886 plans for email verification APIs by price. Half the plans cost $1.998 per 1,000 emails or less.
[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.
[email-validation.org](https://datacircle.dev/validate-email-apis/email-validation-org/450-pack-1000000-credits-post-v1-validate/llms.txt), [pingutil](https://datacircle.dev/validate-email-apis/pingutil/free-api-key-post-v1-verify/llms.txt) and [MailTester Ninja](https://datacircle.dev/validate-email-apis/mailtester-ninja/23-99-monthly/llms.txt) are the best email verification API providers in the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/bouncebuster/free-post-verify
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://bouncebuster.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://app.bouncebuster.io/api/v1/verify`
- API key: with the plan, on https://bouncebuster.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://bouncebuster.io/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: Bouncebuster (https://bouncebuster.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-04

## In the answer

- Completeness: 50%
- Address: ✓
- Deliverability: ✓
- Confidence: ✓

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Verify up to 100 emails synchronously · Create a bulk verification job

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: Verify a single address or millions. Authenticate with a Bearer key, get JSON back. The same account powers our command-line tool and a Model Context Protocol server for AI agents.

## Data

- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: You retain ownership of the lists you upload and the results we return. [...] You agree to use the Service only for lawful purposes and in line with our Acceptable Use Policy. In particular, you agree not to: Use the Service for illegal or fraudulent activity, Verify addresses to harass individuals or to send unsolicited bulk email, Circumvent anti-spam laws or the policies of mailbox providers, Attempt to bypass security, authentication or rate-limiting mechanisms, Reverse-engineer, copy, or redistribute the Service

## Plan

- Pay: $0
- You get: 250 credits a month
- Enough for: 250 calls a month
- Expires: end of the billing period, credits do not roll over

## Rate limit

- Batch: 1

## Speed

- Answer: in the call

## The call

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

## About the plan

- Plan: Free
- Who can get it: anyone

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

email, status, reason, catch-all, catch-all domain, role-based, free provider, disposable, SMTP provider, MX found, MX record, did you mean, domain age in days, confidence, tier, billable, cached, credits charged

## Bouncebuster's plans (10)

- [Bouncebuster, free, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/free-post-verify/llms.txt): $0.00 per 1,000, 50% complete
- [Bouncebuster, $19 monthly, Starter, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/19-monthly-starter-post-verify/llms.txt): $1.90 per 1,000, 50% complete
- [Bouncebuster, $39 monthly, Growth, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/39-monthly-growth-post-verify/llms.txt): $1.56 per 1,000, 50% complete
- [Bouncebuster, $69 monthly, Pro, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/69-monthly-pro-post-verify/llms.txt): $1.38 per 1,000, 50% complete
- [Bouncebuster, $99 monthly, Scale, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/99-monthly-scale-post-verify/llms.txt): $0.99 per 1,000, 50% complete
- [Bouncebuster, $199 monthly, Premium, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/199-monthly-premium-post-verify/llms.txt): $0.796 per 1,000, 50% complete
- [Bouncebuster, $349 monthly, Business, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/349-monthly-business-post-verify/llms.txt): $0.698 per 1,000, 50% complete
- [Bouncebuster, $599 monthly, Enterprise, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/599-monthly-enterprise-post-verify/llms.txt): $0.599 per 1,000, 50% complete
- [Bouncebuster, $1,299 monthly, Enterprise Plus, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/1299-monthly-enterprise-plus-post-verify/llms.txt): $0.52 per 1,000, 50% complete
- [Bouncebuster, $2,299 monthly, Enterprise Max, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/2299-monthly-enterprise-max-post-verify/llms.txt): $0.46 per 1,000, 50% complete

## Bouncebuster's calls (3)

- `POST /lists`: [Bouncebuster, free, POST /lists](https://datacircle.dev/validate-email-apis/bouncebuster/free-post-lists/llms.txt)
- `POST /verify`: [Bouncebuster, free, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/free-post-verify/llms.txt)
- `POST /verify/batch`: [Bouncebuster, free, POST /verify/batch](https://datacircle.dev/validate-email-apis/bouncebuster/free-post-verify-batch/llms.txt)

## Bouncebuster's APIs (1)

- [Bouncebuster: email verification API pricing, 10 plans, POST /verify](https://datacircle.dev/validate-email-apis/bouncebuster/free-post-verify/llms.txt)

## Bouncebuster: email verification API alternatives

- [ProspectAPIs, top-up from $2,000, Top-up of $2,000 or more, +120% bonus credit, POST /v1/email/verify, Verify email addresses, quick check](https://datacircle.dev/validate-email-apis/prospectapis/top-up-from-2000-top-up-of-2000-or-more-120-bonus-credit-post-v1-email-verify-verify-email-addresses-quick-check/llms.txt): $0.455 per 1,000, 50% complete, stored
- [Bounceless, $1,149 pack, 2,500,000 credit pack, POST /v1/requests, Create a batch (listId)](https://datacircle.dev/validate-email-apis/bounceless/1149-pack-2500000-credit-pack-post-v1-requests-create-a-batch-listid/llms.txt): $0.46 per 1,000, 50% complete, live
- [API League, $7 monthly](https://datacircle.dev/validate-email-apis/api-league/7-monthly/llms.txt): $0.467 per 1,000, 67% complete, live
- [PureChecker, $140 monthly, Monthly Subscription, 10,000 emails/day, POST /api/v1/bulk-check](https://datacircle.dev/validate-email-apis/purechecker/140-monthly-monthly-subscription-10000-emails-day-post-api-v1-bulk-check/llms.txt): $0.467 per 1,000, 50% 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 2026-11-04.

- https://app.bouncebuster.io/api/v1/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://bouncebuster.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://bouncebuster.io/_next/static/chunks/739-f31da44f225f9f5a.js?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://bouncebuster.io/docs/api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://bouncebuster.io/legal/acceptable-use?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://bouncebuster.io/legal/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://bouncebuster.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing