Overview

The service checks addresses in real time to help reduce bounces and protect sender reputation. Browser checks, CSV uploads and a REST API cover individual validation as well as larger list-cleaning jobs, making it a practical fit for teams that need both workflows.

Each verification uses one credit when the result is Passed or Failed; unknown catch-all results are not billed. Credits do not expire, and purchases do not renew automatically. That billing is forgiving for intermittent use, though teams with steady demand must keep an eye on their balance and buy another pack when it runs low.

Key features

Verification and list cleaning

The verification engine performs 16 checks, including syntax, SMTP, MX and DNS validation, along with detection for spam traps, disposable addresses, role accounts and catch-all addresses. This makes it useful for screening beyond basic formatting, but a catch-all address may still return an unknown result rather than a definitive pass or fail. CSV upload supports bulk list cleaning.

API and connected workflows

The REST API accepts GET or POST requests and returns JSON by default; an xml parameter enables XML. Language guides cover C#, Go, Java, Node.js, PHP, Python, Ruby and Swift, giving developers several documented entry points. The service also says users can verify lists in Excel and Google Sheets and upload CSV files compatible with HubSpot, Salesforce and Pipedrive.

Privacy and security

The privacy policy says submitted email addresses are purged after each check, while SHA512 hashes are deleted automatically after 30 days. It also says data is transmitted over HTTPS and encrypted while communicating with verification servers. The site claims ISO 27001 and SOC 2 Type II certification and GDPR and CCPA compliance.

Pricing

The free plan provides 100 credits as a one-time allocation, with no credit card required and no expiry. The browser tool also allows five checks per day without an account, a modest way to try individual lookups; the account credits are more useful for sustained evaluation or API and bulk workflows.

Paid plans are one-time purchases: 1,000 credits for 9.95 USD, 5,000 for 34.95 USD, 10,000 for 49.95 USD, 25,000 for 124.95 USD, 50,000 for 249.95 USD, 100,000 for 399.95 USD, 250,000 for 749.95 USD, 500,000 for 1499.95 USD, and 1,000,000 for 2499.95 USD. The per-email rate falls from $0.0100 on the 1,000-credit pack to $0.0025 on the largest pack. Smaller packs limit the upfront commitment, while the lowest unit prices require a much larger purchase; all credits remain available until used.

Because unknown catch-all results are not charged, actual credit use can be lower than the number of addresses submitted. There is no automatic renewal, so buyers retain control over spending but must replenish credits themselves.

Platforms

Email Verifier API runs on the web and through an API. Its CSV workflow and stated Excel and Google Sheets use cover spreadsheet-based list cleaning, while the API is the route for application integration and real-time form checks.

Who it's for

This is a sensible choice for developers adding real-time signup checks and businesses that periodically clean lists without wanting a recurring bill. The no-expiry packs and non-billable unknown results suit uneven or unpredictable volumes. Teams that need a monthly allowance or prefer not to manage credit balances may be better served by a subscription-based alternative.

Pros and cons

Pros: One-time credits never expire and do not renew automatically, which suits occasional verification work.
Pros: Unknown catch-all results are not billed, reducing charges for inconclusive checks.
Pros: The API, CSV uploads and spreadsheet workflows support both application validation and list cleanup.
Cons: The free browser tool is limited to five daily checks; larger trials depend on the account's 100 free credits.
Cons: The lowest stated unit rate requires a 1,000,000-credit purchase, a substantial upfront commitment for smaller teams.

Alternatives

Bounceless is worth considering if a monthly free allowance is more useful: its free plan includes 1,000 credits per month, and its paid options include a one-time 5,000-credit pack for 19.00 USD. Voila Norbert is another option for readers who want an extension alongside API and web access. Mailbeam may suit teams who prefer a monthly plan; its free tier includes 1,000 verifications per month, REST API, bulk CSV upload, batch API and webhooks. MyEmailVerifier is an alternative with daily free credits and API, extension and web platforms.

QuickEmailVerification offers a daily-resetting free tier of 100 credits and a one-time 500-credit option for 4.00 USD. VerifyAnyEmail is an option for readers who want iOS access as well as API and web; its free plan includes 1,000 monthly credits with stated request, batch and concurrency limits. DeBounce may fit buyers who want one-time credit options with all features included. ZeroBounce is another alternative.

For a broader shortlist, see Email Verification Services.

Verdict

Email Verifier API is a strong fit for developers and businesses that need both real-time validation and bulk list cleaning, especially when usage varies from month to month. Its clearest advantage is flexible, non-expiring credit billing that excludes unknown catch-all results. Look elsewhere if a predictable monthly allowance, rather than self-managed one-time packs, better matches how your team works.

	Email Verifier API	MailboxValidator
Free plan	Yes	Yes
Free trial	Yes	Yes
Paid from	Free	Free
Platforms	api, Web	api, Web
Free plan	Yes	No
Bulk list upload	Yes	Yes
API access	Yes	Yes
Real-time form checks	Yes	Yes
Disposable detection	Yes	Yes
Credit rollover	Yes	No

Email Verifier API vs MailboxValidator

Email Verifier API

MailboxValidator