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An open source Cloudflare Worker app and API to check if email addresses are throwaway/disposable or valid

44 starsPython

Throwaway – open-source disposable email checker and API

by weddpros·Apr 30, 2026·14 points·14 comments
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AI Analysis

●●SolidBig BrainNiche Gem

Bloom filter at the edge beats calling ZeroBounce APIs for every signup.

Strengths
  • •291KB bloom filter for 122K domains enables sub-millisecond edge checks
  • •Zero false negatives guarantee matters more than false positives for this use case
  • •No external API calls means no rate limits, no costs, no latency spikes
Weaknesses
  • •Disposable email detection is a solved category with many established paid services
  • •Static build-time filter requires manual redeployment to update the domain list
Target Audience

Backend developers, SaaS founders building signup flows

Similar To

ZeroBounce · Kickbox · MailboxValidator

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