# NoBounce, free sandbox, POST /api/validate-bulk: Email verification API

> NoBounce runs syntax, MX, disposable, catch-all, and zero-send SMTP handshakes from clean verification infrastructure and answers inside your pipeline in under 100ms.

NoBounce's email verification API on its Free Sandbox plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
In [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt), the best plan from NoBounce scores 0.0 out of 100. NoBounce ranks 171st 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/nobounce/free-sandbox-post-api-validate-bulk
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://nobounceapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://nobounceapi.com/api/validate-bulk`
- API key: with the plan, on https://nobounceapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://nobounceapi.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Sold by: NoBounce (https://nobounceapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-05

## In the answer

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

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Validate a single email address (GET)

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## In their words

- Their pitch: NoBounce runs syntax, MX, disposable, catch-all, and zero-send SMTP handshakes from clean verification infrastructure and answers inside your pipeline in under 100ms.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: Our services are provided under a fair usage policy. Users are expected to utilize our services in good faith and within reasonable limits. Abusive or excessive usage that negatively impacts the system or other users may result in temporary or permanent restriction or termination of service.

## Plan

- Pay: $0
- You get: 100 credits a month
- Enough for: 100 results a month

## Rate limit

- Batch: 5,000

## Speed

- Answer: in the call

## The call

- You send: one of emails or file. Optional: format
- Method: POST
- Path: /api/validate-bulk

## About the plan

- Plan: Free Sandbox
- Who can get it: anyone

## The 34 fields the plan's answer can hold

success, enriched CSV, truncated, warning, skipped count, usage limit, usage remaining, usage used, valid count, invalid count, disposable count, free email count, role-based count, typos detected count, processed count, total count, total submitted, email, status, sub-status, valid, format valid, MX record found, SMTP check, SMTP status, free email, free provider, did you mean, suggested email, verification time, verification time in ms, catch-all, disposable, role-based

## NoBounce's plans (7)

- [NoBounce, free sandbox, POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/free-sandbox-post-api-validate-bulk/llms.txt): $0.00 per 1,000, 33% complete, live
- [NoBounce, $9 monthly, Starter, POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/9-monthly-starter-post-api-validate-bulk/llms.txt): $9.00 per 1,000, 33% complete, live
- [NoBounce, $39 monthly, Pro, POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/39-monthly-pro-post-api-validate-bulk/llms.txt): $3.90 per 1,000, 33% complete, live
- [NoBounce, $99 monthly, Scale, POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/99-monthly-scale-post-api-validate-bulk/llms.txt): $0.99 per 1,000, 33% complete, live
- [NoBounce, $84 yearly, Starter (annual), POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/84-yearly-starter-annual-post-api-validate-bulk/llms.txt): $7.00 per 1,000, 33% complete, live
- [NoBounce, $372 yearly, Pro (annual), POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/372-yearly-pro-annual-post-api-validate-bulk/llms.txt): $3.10 per 1,000, 33% complete, live
- [NoBounce, $948 yearly, Scale (annual), POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/948-yearly-scale-annual-post-api-validate-bulk/llms.txt): $0.79 per 1,000, 33% complete, live

## NoBounce's calls (2)

- `GET /api/validate`: [NoBounce, free sandbox, GET /api/validate](https://datacircle.dev/validate-email-apis/nobounce/free-sandbox-get-api-validate/llms.txt)
- `POST /api/validate-bulk`: [NoBounce, free sandbox, POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/free-sandbox-post-api-validate-bulk/llms.txt)

## NoBounce's APIs (1)

- [NoBounce: email verification API pricing, 7 plans, POST /api/validate-bulk](https://datacircle.dev/validate-email-apis/nobounce/free-sandbox-post-api-validate-bulk/llms.txt)

## NoBounce: email verification API alternatives

- [Verimail, $79 monthly](https://datacircle.dev/validate-email-apis/verimail/79-monthly/llms.txt): $0.79 per 1,000, 50% complete, live
- [WarmySender, $79 pack, 100,000 verification credits, POST /verification/batches](https://datacircle.dev/validate-email-apis/warmysender/79-pack-100000-verification-credits-post-verification-batches/llms.txt): $0.79 per 1,000, 33% complete, live
- [TryVerifyEmail, $949 yearly, Growth (annual), POST /v1/bulk-verifications/{jobId}/items](https://datacircle.dev/validate-email-apis/tryverifyemail/949-yearly-growth-annual-post-v1-bulk-verifications-jobid-items/llms.txt): $0.791 per 1,000, 67% complete, live
- [emailvalidation.io, $949.90 yearly, Large, POST /v1/bulk](https://datacircle.dev/validate-email-apis/emailvalidation-io/949-90-yearly-large-post-v1-bulk/llms.txt): $0.792 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 2026-11-05.

- https://nobounceapi.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://nobounceapi.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://nobounceapi.com/llms.txt?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://nobounceapi.com/openapi.json?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://nobounceapi.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://nobounceapi.com/terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing