Block disposable emails before they hit your database
The largest self-contained disposable email detection API. 164,000+ domains aggregated from 6 open-source sources. Check one email or batch 100 at once — all in under 5ms.
One API call. That's the whole product.
Send the email
A single GET request with a Bearer token. Or batch up to 100 emails in one POST. Get your free API key in 30 seconds.
We check against 164,000+ domains
Our aggregated database covers all known disposable email providers. No external API calls, no third-party dependencies, no data leaks. Pure local Set lookup.
Get a verdict in under 5ms
A clean boolean: is this email disposable, yes or no. Reject the signup, flag it for review, or let it through.
Why DisposableGuard?
Most competitors use 1-2 lists with ~120k domains. We aggregate 6 sources and deduplicate.
| DisposableGuard | Typical Competitor | |
|---|---|---|
| Domains tracked | 164,628 | ~120,000 |
| Data sources | 6 aggregated | 1-2 lists |
| External API calls | Zero | Yes |
| Batch endpoint | Yes (100 emails) | No |
| Avg response time | <5ms | 50-200ms |
| Self-hosted ready | Yes | No |
Drop-in integration
Add disposable email detection to your signup flow in under 2 minutes.
Single check
async function isDisposable(email: string) {
const res = await fetch(
`https://api.disposableguard.com/v1/check?email=${encodeURIComponent(email)}`,
{ headers: { Authorization: 'Bearer dg_live_...' } }
);
const { is_disposable } = await res.json();
return is_disposable;
}
// In your signup handler:
if (await isDisposable(email)) {
return Response.json(
{ error: 'Please use a real email address.' },
{ status: 400 }
);
}Batch check (up to 100 emails)
const res = await fetch(
'https://api.disposableguard.com/v1/check/batch',
{
method: 'POST',
headers: {
Authorization: 'Bearer dg_live_...',
'Content-Type': 'application/json',
},
body: JSON.stringify({
emails: ['user@gmail.com', 'test@mailinator.com'],
}),
}
);
const { results, summary } = await res.json();
// summary.disposable === 1
// summary.legitimate === 1Frequently asked questions
What is a disposable email?+
A disposable email is a temporary email address from providers like Mailinator, Guerrilla Mail, or 10 Minute Mail. These addresses are used to sign up for services without revealing a real email, often for spam, fraud, or abuse.
How does DisposableGuard work?+
DisposableGuard checks email domains against a database of 164,628+ known disposable email providers. A single API call returns a boolean verdict in under 5ms. No external API dependencies — all detection happens locally.
How many disposable email domains do you track?+
We track 164,628+ disposable email domains aggregated from 6 open-source sources, deduplicated and filtered to remove legitimate providers like Gmail, Outlook, and ProtonMail.
Is DisposableGuard free?+
Yes. The free plan includes 500 API checks per month with no credit card required. Paid plans start at $9/month for unlimited checks.
What happens if your API goes down?+
Our API is designed to fail open. If our service is unavailable, your signup flow should proceed normally. We recommend treating the disposable check as a strong signal, not a hard block.