- Captain Verify ›
- Advertising networks
Verify your leads in real time
Are you an advertising network looking to keep only the leads you can actually reach? Captain Verify checks the email and the mobile of every prospect in real time, right at collection, to make your pipeline reliable and increase your conversion rate.
Why do advertising networks verify their leads with Captain Verify?
A lead that looks qualified on paper is worth nothing if its email bounces or its mobile number no longer exists. Captain Verify checks every email and every mobile number at the very moment of collection, before the lead enters your CRM or gets sold on to an advertiser. Verification becomes the first layer of qualification: real contact details, reachable, ready to use. The "verified lead" completes the declarative "qualified lead" with technical proof: its email and mobile number have been checked. For the ad network, the result is fewer throwaway leads in the pipeline, a protected sender reputation and campaigns that convert better.
Eliminate fake leads
Every email and every mobile number is verified at the point of collection, which keeps your pipeline clean over time.
Protect your reputation
Fewer hard bounces and spam traps mean better deliverability for your campaigns and for those of your clients.
Increase conversion
Real, reachable contact details turn every contact into a workable sales opportunity.
Get more out of your data
A verified lead sells and works better than a lead qualified on the contact's word alone.
Our services
Clean Bulk Email Lists
Learn moreEmail Validation API
Learn moreHLR Lookup
Learn moreHLR Lookup API
Learn moreOur Advantages
Real-time API
Speed makes the difference in marketing. The Captain Verify API validates your leads on the fly: in a few milliseconds, it checks each prospect's email address or mobile number and confirms whether they are genuinely reachable. Your forms only record valid contact details, and your campaigns start from a clean base with the very first send.
Collaborative accounts: work efficiently as a team
Collaborative accounts bring your team together on a single platform. Everyone shares their projects and verification results with their colleagues, which smooths out the lead validation and qualification process. Access rights and tasks are distributed in an organized and secure environment, for a more productive team.
Sliding scale pricing: the more you verify, the less you pay
Our pricing structure is designed for advertising networks. The more leads you verify, the lower your cost per verification, whatever the size of your organization. Flexible plans adapt to your volumes and maximize the return on investment of your campaigns.
How does real-time lead verification work?
Two technical checks run the moment the form is submitted: one on the email, the other on the mobile. They decide whether the lead enters your pipeline or stops at the door.
Real-time email verification
Every lead email goes through a multi-layer check: syntax, existence of the domain and of the MX records, actual presence of the inbox, detection of disposable addresses, spam traps and role addresses (contact@, info@). In a single call, this filter removes the leads that would have pushed up your bounce rate within 48 hours of sending. Email verification can be run in bulk on your existing lists or in real time through the email validation API, right when the form is submitted.
Mobile verification via HLR Lookup
The mobile number a lead gives you may be inactive, badly formatted or already reassigned to another subscriber. HLR Lookup queries the operator's network live to confirm that the line is active, identify the originating operator and detect recent portability. A number validated by HLR is a number where an SMS or a call has a real chance of getting through. The mobile verification API plugs into your collection form to block invalid numbers before the lead is ever recorded.
From verified data to conversion
A lead qualified by a declarative score remains unconfirmed data as long as the email and the mobile number have not been checked technically. Verification acts as the qualification layer itself: it turns a declaration into a usable contact detail. For an ad network, the effect shows up at several levels: a lower hard bounce rate protects the sender reputation of the campaigns sent afterwards, a clean pipeline lowers the cost per genuinely usable lead, and a reachable contact converts better than a phantom lead. In 2026, ISPs and mobile operators monitor these signals continuously: a base kept clean at collection remains the most direct lever to protect that reputation over time.
What is a verified lead?
A verified lead is a contact whose email and mobile number have been confirmed active and reachable at the time of collection, through a syntax check, an MX/mailbox verification and an HLR Lookup. Unlike a lead that is simply declared, a verified lead has contact details that genuinely exist in the systems of ISPs and mobile operators.
How do you check the quality of a lead?
Lead quality is measured on two data points: the email (syntax, domain, mailbox, disposable address detection) and the mobile number (active line, operator, portability via HLR). A verification API applied at the moment the form is submitted confirms both points before the lead enters the CRM or is sold on.
Can leads be verified in real time via API?
Yes, the Captain Verify email API and HLR API plug into your collection form and return a result in a few hundred milliseconds. The invalid lead is identified before it is recorded, which keeps dead contact details out of your CRM.
What is the difference between a qualified lead and a verified lead?
A qualified lead meets declarative criteria: budget, job title, interest. A verified lead also has an email and a mobile number confirmed active. A lead can be qualified on paper and invalid in practice if nobody has checked its contact details.
Does verification really reduce fake leads?
An email and mobile check at collection filters out disposable addresses, spam traps and inactive numbers before they enter the pipeline. Lead volume drops slightly at the entry point, and every remaining lead becomes reachable, which improves the final conversion rate.
They already verify their leads with Captain Verify
Many advertising networks around the world use Captain Verify to check the email and mobile number of their leads in real time, both before collection and in bulk on existing lists. This systematic check limits fake leads in the pipeline and protects the sender reputation of the campaigns that follow.