01
Catch preventable input errors
Identify malformed addresses, missing domains, absent MX records, disposable inboxes, and role-based accounts before they spread.
Product / Single verification
One address. The right evidence. Right now.
Make the next email decision before the moment passes.
Verify one address in real time through a simple API. Choose a fast domain check or go all the way to mailbox evidence, based on the cost of getting the decision wrong.
- Real-time REST API
- 0.5, 1, or 2 credits
- Unknown outcomes refunded
Stop bad data at the point of entry
A list-cleaning job cannot prevent the mistake happening now.
When a user signs up, a teammate creates a CRM contact, or a critical email is about to send, the useful answer is the one your product can act on immediately.
02
Match evidence to the decision
Use inexpensive domain screening for low-risk moments and reserve mailbox-level Deepcheck for higher-value sends.
03
Route more than pass or fail
Treat invalid, risky, unknown, disposable, role-based, personal, and professional results according to your own policy.
Built for transactional moments
Use single verification when one record is blocking the next action.
The API fits decisions that happen inside a live product or operational workflow.
Signup and lead forms
Screen obvious errors and disposable addresses before creating a low-quality account or lead.
Invitations and password resets
Check the destination before a time-sensitive account email is queued.
CRM contact creation
Validate a new or edited address before it becomes part of reporting, routing, or automation.
High-value outbound
Run Deepcheck before a message where a hard bounce or missed recipient is especially costly.
Marketplace notifications
Protect receipts, booking updates, and service messages that depend on a usable destination.
Support-led corrections
Confirm a replacement email before changing the customer’s contact record.
A small integration with a clear contract
Send one address. Receive an actionable result.
The API separates address validity from mailbox deliverability so your code can make an honest decision.
- 01
Choose the verification depth
Use Quick for syntax/domain screening, Standard for domain trust intelligence, or Deepcheck for SMTP and catch-all evidence.
- 02
Call the verification endpoint
Send one email with your server-side API key. Standard is the default when no type is supplied.
- 03
Apply your product policy
Accept, reject, retry, step up to Deepcheck, or request review using explicit address, mailbox, and risk signals.
Progressive verification
Do not pay or wait for evidence the decision does not need.
Each depth adds a deliberate layer of evidence while preserving a consistent response model.
Quick · 0.5 credit
Syntax, domain, MX, disposable, role-based, personal/professional, TLD, and name signals for fast screening.
Standard · 1 credit
Adds provider, SPF, DKIM, DMARC, blocklist, parked-domain, and WHOIS context without contacting the mailbox.
Deepcheck · 2 credits
Adds SMTP mailbox verification, catch-all detection, deliverability score, confidence, and MX evidence.
Honest mailbox status
Quick and Standard return not_checked for the mailbox instead of implying an address-level pass proves mailbox existence.
Explainable results
Inspect the underlying signals instead of receiving an unexplained binary verdict.
Automatic refunds
Failed executions and inconclusive unknown API outcomes return the relevant credits automatically.
Your first 100 credits are free
Put a reliable email decision inside your product.
Start without a card. Choose the workflow and verification depth that match the decision in front of you.