Is It Disposable

Is It Disposable is a service that spots and blocks throwaway email addresses before they reach your signup flow. Its dataset is refreshed daily and it checks domains at the DNS level rather than probing mailboxes over SMTP.

Integration is straightforward: use a small JavaScript snippet or call the REST API. The response is more than a yes-or-no flag — you get a handful of signals you can act on, and you can set each signal to allow, warn or block.

• Signals include undeliverable domains, privacy relays, public providers, role accounts, spam risk and masked routing.

Custom allowlists and blocklists take priority. The service keeps privacy in mind by storing just the email domain by default, and it’s designed to fail open if there’s an outage or quota limit so signups aren’t interrupted. A free plan is available with immediate access and no waitlist. More details at https://isitdisposable.com/.