Integrate real-time email verification into any workflow. BounceZero API returns a full verification result in under a second - valid, invalid, risky, catch-all, disposable, role-based - with a single REST call.
100 free verifications every month. No credit card required.
Cleaning your list once a quarter treats the symptom. Typos, disposable addresses, and fake signups get in through your forms every single day - real-time API verification stops them at the door.
Users mistype "gamil.com" and "hotmial.com" at signup constantly. Each one becomes a hard bounce that drags down your sender reputation. Email lists decay at roughly 22% per year - and every new day of unverified signups accelerates it.
Throwaway addresses from temporary inbox services inflate your user counts, burn free-trial abuse into your funnel metrics, and never convert. An API check at the form blocks them before they ever hit your database.
By the time a quarterly cleanup runs, invalid addresses have already received campaigns, triggered bounces, and hurt deliverability. Real-time verification means every address in your CRM was valid the moment it arrived.
One REST request, one JSON response - and behind it, a full verification pipeline completing in 340ms on average. Each response includes a status, a confidence score, and the individual check results.
SMTP-level probe confirms the exact mailbox exists and accepts mail - not just that the domain resolves.
A 3-probe test identifies domains that accept everything. Around 23% of B2B domains are catch-all - the API flags them as risky instead of falsely valid.
Flags info@, sales@, admin@ and other role-based addresses that engage poorly and trigger spam complaints.
Blocks temporary inbox services in real time using a continuously updated provider database.
Confirms the domain has live, correctly configured mail servers before deeper checks run.
Screens for known and suspected spam trap patterns so one bad signup never lands you on a blocklist.
A single authenticated GET or POST request. No SDK lock-in, no webhooks required for single verifications, no complicated setup.
Sign up at app.bouncezero.io - no credit card needed. Your account includes 100 free verifications every month.
Create a key from your dashboard in one click. Keys are scoped per project, so staging and production stay cleanly separated.
Call the verify endpoint with an email address and your key. Copy-paste examples for cURL, Python, PHP, Node.js, and Ruby are in the API docs.
You receive a status (valid, invalid, risky, catch-all, disposable, role-based), a confidence score, and per-check details - in 340ms on average.
Block invalid addresses at your signup form, suggest typo corrections, route risky addresses to double opt-in, and let clean signups straight through.
API calls cost exactly the same as bulk verifications - $3 per 1,000. No monthly platform fee, no per-seat pricing, and your credits never expire.
Pair the API with bulk verification for your back catalog. Upload up to 500,000 emails per batch - a 10K list finishes in 5-10 minutes at the same $3 per 1,000 rate.
Not sure what cleaning is worth to you? Estimate your deliverability savings with our free calculator.
Everything developers ask before integrating BounceZero.
The BounceZero API responds in 340ms on average, including SMTP-level mailbox checks. Some corporate mail servers respond slower, but the vast majority of verifications complete well under one second - fast enough to run inline on a signup form without hurting UX.
Every call returns a JSON object with an overall status (valid, invalid, risky, catch-all, disposable, or role-based), a confidence score, and the result of each individual check: mailbox existence, catch-all detection, role account, disposable provider, MX records, and spam trap screening.
BounceZero delivers 99.8% verification accuracy, versus an industry benchmark of roughly 95%. The biggest difference is catch-all handling: our 3-probe detection correctly flags catch-all domains - around 23% of all B2B domains - instead of marking them falsely valid.
API verifications cost $3 per 1,000 emails - the same rate as bulk verification, with no monthly platform fee and no API surcharge. Every account also includes 100 free verifications per month, no credit card required.
Yes. Alongside single real-time calls, the API supports bulk jobs of up to 500,000 emails per batch. A 10,000-email list typically completes in 5-10 minutes, and you can poll job status or download results programmatically.
Yes - every account gets 100 free verifications per month with full API access and no credit card required. That is enough to integrate, test against real addresses, and validate the response format before you buy credits.
Get your API key, make your first call in minutes, and stop bad emails at the point of capture. 100 free verifications every month - no credit card required.
Get Your Free API Key99.8% accuracy - $3 per 1,000 verifications - 340ms average response
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