# Qualisend, free, POST /verify/bulk: Email verification API

> A simple REST API that checks real mailboxes and hands back a clear verdict for every address - one at a time or a million at once.

Qualisend'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 Qualisend scores 61.1 out of 100. Qualisend ranks 29th of 181 providers.
This plan is free. We rank 3,753 plans for email verification APIs by price. Half the plans cost $1.98 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.
[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 the Datacircle benchmark.

- This page: https://datacircle.dev/validate-email-apis/qualisend/free-post-verify-bulk
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://www.qualisend.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://app.qualisend.com/api/v1/verify/bulk`
- API key: with the plan, on https://www.qualisend.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://www.qualisend.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#tag/verification/POST/verify/bulk
- Sold by: Qualisend (https://qualisend.com?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-05

## In the answer

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

## Price

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

## Aggregators

- Aggregators: none

## Charges

- Also pays for: from the same budget: Verify a single address · Get a job · Check available credits · Get webhook signing secret

## Overage

- Units cap: hard

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: A simple REST API that checks real mailboxes and hands back a clear verdict for every address - one at a time or a million at once.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: only lawful purposes: "You agree to use the services only for lawful purposes and in compliance with these Terms, our Acceptable Use Policy, and all applicable laws and regulations. You agree not to use the services to submit email addresses or lists that you do not have a lawful basis or right to process, [...] to send unsolicited commercial communications (spam) or violate applicable anti-spam laws including CAN-SPAM, GDPR, and CASL, [...] to transfer or share your account with any third party, or to use verification results to facilitate harassment, phishing, fraud, or unlawful contact." Its Acceptable Use Policy: "You may not: Submit email addresses you do not have a lawful basis or right to process, Harvest or collect email addresses without consent, Use purchased or rented email lists, Use verification results to send unsolicited commercial email (spam), Use our Services to enable harassment, doxxing, or unlawful contact, Impersonate others or misrepresent your identity, Interfere with or disrupt our Services or verification infrastructure, Attempt unauthorized access to our systems, Use automated tools to scrape our Services, Resell or redistribute our Services without permission, Violate CAN-SPAM, GDPR, or other applicable regulations." "If you use Qualisend to prepare or clean lists for email campaigns, you must: Obtain proper consent before sending emails, Provide clear unsubscribe mechanisms, Honor opt-out requests promptly (within 10 business days), Include accurate sender information, Comply with anti-spam laws in recipient jurisdictions."

## Plan

- Pay: $0
- You get: 100 credits
- Enough for: 100 results, once
- Expires: never

## Rate limit

- Per second: 1
- Batch: 1,000,000

## Speed

- Answer: by polling or webhook

## The call

- You send: expected_count, one of text or storage_path. Optional: email_column, callback_url, filename, Idempotency-Key
- Method: POST
- Path: /verify/bulk

## About the plan

- Plan: Free
- Who can get it: anyone aged 18 or over

## The 19 fields the plan's answer can hold

job ID, job type, job status, total, processed, progress, deliverable count, risky count, undeliverable count, unknown count, created at, completed at, email address, status, score, reason, did you mean, row index, total results

## Qualisend's plans (18)

- [Qualisend, free, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/free-post-verify-bulk/llms.txt): $0.00 per 1,000, 50% complete, live
- [Qualisend, $6 pack, Pay as you go, 1,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/6-pack-pay-as-you-go-1000-credits-post-verify-bulk/llms.txt): $6.00 per 1,000, 50% complete, live
- [Qualisend, $28 pack, Pay as you go, 5,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/28-pack-pay-as-you-go-5000-credits-post-verify-bulk/llms.txt): $5.60 per 1,000, 50% complete, live
- [Qualisend, $49 pack, Pay as you go, 10,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/49-pack-pay-as-you-go-10000-credits-post-verify-bulk/llms.txt): $4.90 per 1,000, 50% complete, live
- [Qualisend, $199 pack, Pay as you go, 50,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/199-pack-pay-as-you-go-50000-credits-post-verify-bulk/llms.txt): $3.98 per 1,000, 50% complete, live
- [Qualisend, $329 pack, Pay as you go, 100,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/329-pack-pay-as-you-go-100000-credits-post-verify-bulk/llms.txt): $3.29 per 1,000, 50% complete, live
- [Qualisend, $600 pack, Pay as you go, 250,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/600-pack-pay-as-you-go-250000-credits-post-verify-bulk/llms.txt): $2.40 per 1,000, 50% complete, live
- [Qualisend, $1,000 pack, Pay as you go, 500,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/1000-pack-pay-as-you-go-500000-credits-post-verify-bulk/llms.txt): $2.00 per 1,000, 50% complete, live
- [Qualisend, $1,600 pack, Pay as you go, 1,000,000 credits, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/1600-pack-pay-as-you-go-1000000-credits-post-verify-bulk/llms.txt): $1.60 per 1,000, 50% complete, live
- [Qualisend, $5 monthly, Pro, 1,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/5-monthly-pro-1000-credits-a-month-post-verify-bulk/llms.txt): $5.00 per 1,000, 50% complete, live
- [Qualisend, $22 monthly, Pro, 5,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/22-monthly-pro-5000-credits-a-month-post-verify-bulk/llms.txt): $4.40 per 1,000, 50% complete, live
- [Qualisend, $39 monthly, Pro, 10,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/39-monthly-pro-10000-credits-a-month-post-verify-bulk/llms.txt): $3.90 per 1,000, 50% complete, live
- [Qualisend, $159 monthly, Pro, 50,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/159-monthly-pro-50000-credits-a-month-post-verify-bulk/llms.txt): $3.18 per 1,000, 50% complete, live
- [Qualisend, $263 monthly, Pro, 100,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/263-monthly-pro-100000-credits-a-month-post-verify-bulk/llms.txt): $2.63 per 1,000, 50% complete, live
- [Qualisend, $480 monthly, Pro, 250,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/480-monthly-pro-250000-credits-a-month-post-verify-bulk/llms.txt): $1.92 per 1,000, 50% complete, live
- [Qualisend, $800 monthly, Pro, 500,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/800-monthly-pro-500000-credits-a-month-post-verify-bulk/llms.txt): $1.60 per 1,000, 50% complete, live
- [Qualisend, $1,280 monthly, Pro, 1,000,000 credits a month, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/1280-monthly-pro-1000000-credits-a-month-post-verify-bulk/llms.txt): $1.28 per 1,000, 50% complete, live
- [Qualisend, contact us, Enterprise, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/contact-us-enterprise-post-verify-bulk/llms.txt): 50% complete, live

## Qualisend's calls (2)

- `POST /verify/bulk`: [Qualisend, free, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/free-post-verify-bulk/llms.txt)
- `POST /verify`: [Qualisend, free, POST /verify](https://datacircle.dev/validate-email-apis/qualisend/free-post-verify/llms.txt)

## Qualisend's APIs (1)

- [Qualisend: email verification API pricing, 18 plans, POST /verify/bulk](https://datacircle.dev/validate-email-apis/qualisend/free-post-verify-bulk/llms.txt)

## Qualisend: email verification API alternatives

- [Zuhal, $32 pack, Pay As You Go: 25,000 Credits, POST /bulk/upload](https://datacircle.dev/validate-email-apis/zuhal/32-pack-pay-as-you-go-25000-credits-post-bulk-upload/llms.txt): $1.28 per 1,000, 33% complete, live
- [Invalid Bounce, $96 monthly](https://datacircle.dev/validate-email-apis/invalid-bounce/96-monthly/llms.txt): $1.28 per 1,000, 17% complete, live
- [Proofy, $32 pack, Pay-As-You-Go, 25,000 credits, GET /verify/single](https://datacircle.dev/validate-email-apis/proofy/32-pack-pay-as-you-go-25000-credits-get-verify-single/llms.txt): $1.28 per 1,000, 33% complete, live
- [CleanMyList, $77 monthly, Verify Growth, POST /v1/jobs](https://datacircle.dev/validate-email-apis/cleanmylist/77-monthly-verify-growth-post-v1-jobs/llms.txt): $1.283 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 2026-11-05.

- https://www.qualisend.com/_next/static/chunks/1747-3fb73ff7765c8554.js?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.qualisend.com/acceptable-use-policy?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.qualisend.com/developers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.qualisend.com/docs?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.qualisend.com/openapi.yaml?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.qualisend.com/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://www.qualisend.com/terms-of-service?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing