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Underscore Done

Call ready-to-use APIs for HTTP tests, DNS, WHOIS, DMARC, and hashing

Underscore Done

Underscore Done offers a suite of plug-and-play APIs for common developer tasks. Make real HTTP requests from the cloud, check HTTP status and redirects, look up DNS and WHOIS, bulk-verify DMARC, and compute hashes and HMACs with timing-safe checks. Generate QR codes, parse sitemaps, and calculate mortgage amortization with precise schedules. Use simple JSON requests and get structured responses you can drop into scripts, dashboards, or pipelines.

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Web Development User Testing Email Management Encryption Local Discovery

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June 30, 2026
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