FreeCustom.Email
Test signup flows with disposable inboxes and OTP parsing
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- DevelopersQA EngineersBackend Developers
About FreeCustom.Email
FreeCustom.Email now provides a full developer API for creating disposable inboxes programmatically. Built for testing signup flows, automation, and OTP verification. Features: • Automatic OTP / verification code extraction • Real-time email delivery via WebSockets • CLI for scripting and automation • Attachment support up to 50MB • Custom domain inboxes • Non-expiring request credits Free plan available — no credit card required. Try it live → freecustom.email/api/playground
Product Insights
FreeCustom.Email is a developer-focused tool for automating disposable email workflows via API and CLI. It simplifies testing by offering real-time WebSocket delivery and automatic OTP extraction for QA and development tasks.
- Programmatic control through a full developer API and terminal-based CLI for scripting.
- Automated extraction of OTP and verification codes from incoming messages.
- Real-time email delivery using WebSockets to bypass dashboard latency.
- Support for high-volume attachments up to 50MB and custom domain configurations.
Ideal for: Developers and QA Engineers needing to automate OTP verification and signup flow testing within CI/CD pipelines and backend environments.
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Product Updates (1)
🚀 Built a CLI for disposable email APIs (made for dev workflows)
Hey everyone 👋 I noticed most temp email tools are slow, UI-heavy, and painful to use inside real dev workflows — especially for testing OTPs, automations, or scripts. So I built a CLI for FreeCustom.Email that lets you: • Generate inboxes instantly • Fetch emails via terminal • Use directly in scripts / CI / AI agents • Skip dashboards completely Basically — no more clicking around just to test an OTP flow. You can plug it into: test scripts automation workflows AI agents backend dev environments Docs + CLI: https://www.freecustom.email/api/cli Would love feedback from devs who actually build stuff 🙏
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It is faster than other free email alternatives. I would love to see a rotating selection of domains when changing addresses, even on the free plan.
@alcazarsec we have many rotating domains on free plans too.. and recently, one of our user donated two domains for all guest users.. im very gratefull for such users..:)