One call per address, a straight SEND, HOLD or DROP back in real time. Or white-label the whole thing and sell cleaning as your own product. Same verdicts, your brand.
No SDK to wrestle, no dashboard to babysit. Point your form or app at one endpoint, pass one email, act on the answer.
Send one email to one endpoint. Get back a structured SEND, HOLD or DROP, with the reason, ready to branch on in your own logic.
Check each address the second it is typed, at the point of capture, so bad data never gets in and your list never rots between sends.
Wire it into n8n, Make or Zapier as a step, or straight into your own code. New lead comes in, ListBro reads it, your flow routes it.
Send one address. Get one verdict back, plus a plain reason you can act on.
POST /v1/verify
Content-Type: application/json
{
"email": "buyer@realco.com"
}{
"email": "buyer@realco.com",
"verdict": "SEND",
"reason": "active mailbox, clean domain"
}Accept the SENDs. Flag the HOLDs for a second look. Block the DROPs before they cost you a bounce. Illustrative only, no keys shown.
Put your brand on the verdicts and the API URLs. Your customers see your product, not ours. You set the price, you keep the margin.
Your brand on the SEND, HOLD and DROP verdicts and on the API URLs. Your customers never see ListBro. They see you.
Set your own retail and keep the difference. Cleaning becomes a line you sell, not a cost you eat. We run the engine underneath.
Reseller pricing is set with you, one to one, so we do not print numbers here. A simple flat fee applies. Talk to us and we will size it to your volume.
Add clean, real-time list validation to what you already run for clients, with your own brand on the verdicts.
Gate signups and sends on a verdict without building a validation stack from scratch. One endpoint, plugged in.
Embed validation inside your product so every address your users add gets a SEND, HOLD or DROP at the door.
Wire ListBro into your signup flow, or white-label the whole thing and sell cleaning as your own. Custom pricing, a simple flat fee, your brand on the verdicts. Tell us what you're building.
Get an API key →