# Sparkle, free, POST /email-verifier/bulk/thorough: Email verification API

> This API provides real-time email address validation and verification to ensure that an email address is correctly formatted, valid, and deliverable. Use this service to improve email delivery rates, reduce bounce rates, and maintain the cleanliness of your email lists.

Sparkle's email verification API on its Free plan. It costs $0.00 per 1,000 emails. It returns 2 of the 6 key fields we check: Address, Deliverability.
We haven't run Sparkle through [our email verification API benchmark](https://datacircle.dev/best-email-verification-api.txt) yet.
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/sparkle/free-post-email-verifier-bulk-thorough
- [Email validation API: 180+ verification providers compared](https://datacircle.dev/best-email-verification-api.txt)
- Get it: https://sparkle.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Request: `POST https://api.sparkle.io/api/v1/email-verifier/bulk/thorough`
- API key: with the plan, on https://sparkle.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- Its API docs: https://developer.sparkle.io/?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing#be0e66c6-fdd5-41c5-9442-4e31b958e19b
- Sold by: Sparkle (https://sparkle.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing)
- Checked: 2026-11-03

## 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: Single Verify - Quick · Single Verify - Thorough · Single Verify - Catchall · Single Verify - Clever · Bulk Quick Verify · Bulk catchall Verify · Bulk Clever Verify

## Not found

- $ per 1,000: $0.00

## Catch-all

- $ per 1,000: $0.00

## In their words

- Their pitch: This API provides real-time email address validation and verification to ensure that an email address is correctly formatted, valid, and deliverable. Use this service to improve email delivery rates, reduce bounce rates, and maintain the cleanliness of your email lists.

## Data

- Freshness: live
- What it checks: format, mail servers, disposable domains, role addresses, mailbox
- Keep data: no limit
- Use data: A limited, non-exclusive, non-transferable, non-sublicensable, revocable license to access and use the API solely for the purpose of integrating with and using the Platform's features in connection with the User's account [...] The User shall NOT use the API to: (a) Build a competing product or service that replicates the core functionality of Sparkle.io, (b) Scrape, harvest, or systematically extract data from the Platform beyond what is necessary for the User's authorized use, (c) Resell, sublicense, or redistribute API access to third parties without Sparkle Technologies LLC's prior written consent, [...] (f) Use the API in any manner that violates the Anti-Spam & Email Acceptable Use Policy, Data License & Contribution Agreement, or any other incorporated policy, [...] All data accessed, transmitted, or processed via the API is subject to the Sparkle.io Terms and Conditions, Data License & Contribution Agreement, and Privacy Policy, The User shall not use the API to access, store, or process personal data in violation of any applicable data protection law [...] the User grants Sparkle Technologies LLC a worldwide, non-exclusive, royalty-free, fully paid-up, perpetual, irrevocable, sub-licensable, and transferable license to use, reproduce, modify, adapt, process, aggregate, analyze, distribute, commercialize, and create derivative works from such User Data [...] To license, sell, distribute, or otherwise make available aggregated, enriched, or derived datasets to third parties [...] There is no opt-out mechanism for data contribution

## Plan

- Pay: $0
- You get: 200 credits a day
- Enough for: 100 results a day

## Speed

- Answer: by polling

## The call

- You send: list_name, email_list[].email
- Method: POST
- Path: /email-verifier/bulk/thorough

## About the plan

- Plan: Free
- Who can get it: anyone

## The 27 fields the plan's answer can hold

error, status code, message, list ID, record ID, UUID, email address, verification error, result, result message, sub-status, valid syntax, disposable, valid domain, catch-all, role address, valid SMTP, valid email, tarpitting, greylisted, safe to send, deliverable, can connect SMTP, parked domain, free email account, MX record, verify status

## Sparkle's plans (5)

- [Sparkle, free, POST /email-verifier/bulk/thorough](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-bulk-thorough/llms.txt): $0.00 per 1,000, 33% complete, live
- [Sparkle, $29 monthly, Starter, POST /email-verifier/bulk/thorough](https://datacircle.dev/validate-email-apis/sparkle/29-monthly-starter-post-email-verifier-bulk-thorough/llms.txt): $3.867 per 1,000, 33% complete, live
- [Sparkle, $59 monthly, Business, POST /email-verifier/bulk/thorough](https://datacircle.dev/validate-email-apis/sparkle/59-monthly-business-post-email-verifier-bulk-thorough/llms.txt): $0.787 per 1,000, 33% complete, live
- [Sparkle, $290 yearly, Starter, POST /email-verifier/bulk/thorough](https://datacircle.dev/validate-email-apis/sparkle/290-yearly-starter-post-email-verifier-bulk-thorough/llms.txt): $3.222 per 1,000, 33% complete, live
- [Sparkle, $590 yearly, Business, POST /email-verifier/bulk/thorough](https://datacircle.dev/validate-email-apis/sparkle/590-yearly-business-post-email-verifier-bulk-thorough/llms.txt): $0.656 per 1,000, 33% complete, live

## Sparkle's calls (8)

- `POST /email-verifier/bulk/catchall`: [Sparkle, free, POST /email-verifier/bulk/catchall](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-bulk-catchall/llms.txt)
- `POST /email-verifier/bulk/clever`: [Sparkle, free, POST /email-verifier/bulk/clever](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-bulk-clever/llms.txt)
- `POST /email-verifier/bulk/quick`: [Sparkle, free, POST /email-verifier/bulk/quick](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-bulk-quick/llms.txt)
- `POST /email-verifier/bulk/thorough`: [Sparkle, free, POST /email-verifier/bulk/thorough](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-bulk-thorough/llms.txt)
- `POST /email-verifier/single/catchall`: [Sparkle, free, POST /email-verifier/single/catchall](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-single-catchall/llms.txt)
- `POST /email-verifier/single/clever`: [Sparkle, free, POST /email-verifier/single/clever](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-single-clever/llms.txt)
- `POST /email-verifier/single/quick`: [Sparkle, free, POST /email-verifier/single/quick](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-single-quick/llms.txt)
- `POST /email-verifier/single/thorough`: [Sparkle, free, POST /email-verifier/single/thorough](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-single-thorough/llms.txt)

## Sparkle's APIs (1)

- [Sparkle: email verification API pricing, 5 plans, POST /email-verifier/bulk/thorough](https://datacircle.dev/validate-email-apis/sparkle/free-post-email-verifier-bulk-thorough/llms.txt)

## Sparkle: email verification API alternatives

- [Mailnjoy, €290 pack, 500,000 credits, POST /v2/unitary, Unitary validation (simple)](https://datacircle.dev/validate-email-apis/mailnjoy/290-pack-500000-credits-post-v2-unitary-unitary-validation-simple/llms.txt): $0.653 per 1,000, 33% complete, live
- [Verifalia, $5,988 yearly](https://datacircle.dev/validate-email-apis/verifalia/5988-yearly/llms.txt): $0.656 per 1,000, 67% complete, live
- [Captain Verify, €585 monthly, 1,000,000 Email Verifications, subscription, GET /verify](https://datacircle.dev/validate-email-apis/captain-verify/585-monthly-1000000-email-verifications-subscription-get-verify/llms.txt): $0.658 per 1,000, 33% complete, live
- [EmailListVerify, top-up from $659, 1,000,000 credits, POST /api/verifyApiFile](https://datacircle.dev/validate-email-apis/emaillistverify/top-up-from-659-1000000-credits-post-api-verifyapifile/llms.txt): $0.659 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 2026-11-03.

- https://developer.sparkle.io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://developer.sparkle.io/api/collections/33653829/2sAY546e2E?segregateAuth=true&versionTag=latest&utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sparkle.io/api-terms?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sparkle.io/data-license?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sparkle.io/email-verifier?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sparkle.io/pricing?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://sparkle.io/product/email-verifier/our-numbers?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://support.sparkle.io/en/articles/10382958-sparkle-io-s-verification-accuracy-quick-thorough-catch-all-and-clever-mode-explained?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://support.sparkle.io/en/articles/10383000-how-do-sparkles-work-in-sparkle-io?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing
- https://support.sparkle.io/en/articles/10897114-getting-started-with-sparkle-io-s-email-verification-api?utm_source=datacircle.dev&utm_medium=referral&utm_campaign=email-verification-api-pricing