Show HN: Tempo Checker – Real-time disposable email detection API

Tempo Checker, a real-time API for detecting disposable, temporary, and burner email addresses, launched publicly on August 20, 2026, per a Show HN post by its creator, who goes by rami-dev.

The API is aimed at developers who want to block fake signups at the point of registration without adding significant overhead to backend flows. According to the Show HN post, it relies on two core detection layers: live MX DNS checks, which verify that a submitted email's domain has functioning mail exchange records, and cross-referencing against an aggregated blocklist of known disposable and temporary email providers.

The project was built by Rami, a solo developer, using Go and Python. No funding, team size, or company affiliation is mentioned in the source. The product site and the HN submission represent the full public record of the launch at this time.

Disposable email detection is a crowded space — services like Mailgun, Abstract API, and dedicated open-source blocklists such as disposable-email-domains already address the same problem. Tempo Checker's stated differentiator is speed and simplicity: Rami describes wanting "a fast, straightforward API" that avoids unnecessary backend overhead, per the Show HN post. The live MX validation step goes a step beyond purely static blocklists by confirming a domain can actually receive mail at query time.

Rami noted in the HN submission that he is actively seeking feedback on MX record edge cases, blocklist methodology, and general performance. No pricing tiers, rate limits, or SLA details are disclosed in the available sources.