Signup email validation
Validate signup emails before bad accounts enter your app
Bad signup emails create support, fraud, and data-quality problems. Add Verifly to your signup flow to check mailbox validity, disposable domains, and risky addresses before accounts are created.
Validate in a signup flowAPI
const verify = await fetch(`https://verifly.email/api/v1/verify?email=${email}`, {
headers: { Authorization: `Bearer ${process.env.VERIFLY_API_KEY}` }
})
const data = await verify.json()
if (data.result === 'invalid' || data.disposable) throw new Error('Use a valid email')Real-time SMTP mailbox checks
Single, batch, and async bulk verification
Disposable, role account, and catch-all detection
Pay-as-you-go credits with no subscription lock-in
Search fit
Built for signup email validation searches
Use Verifly when you need a simple API, predictable pricing, and clean JSON results before emails hit your product, CRM, or campaign tool.
Validate emails in signup forms before account creation
Block disposable addresses from trials and free tiers
Protect CRM and lifecycle email data quality
Integrate quickly with Node, Python, Next.js, or server actions
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