Bots use disposable emails to farm your free tier — burning API credits, SMS costs, and server time. SignGuard scores every signup: disposable domains, typosquats, catch-alls, SMTP checks, domain age. 3 lines of code. Free tier, then $19/mo.
APIDeveloper ToolsGitHubSecurity
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Launched
September 12, 2026
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2
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