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A static web server written in COBOL

An hour with Claude produced a working web server in COBOL.

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Credits

  • Repository account jmsdnns Source ↗
  • HN submitter jmsdnns Source ↗

Earliest dated source: 29 Sept 2025

Code ↗

The full story

Webbol is a minimal static web server written in COBOL with GnuCOBOL, produced in about an hour with Claude. It serves files from the current folder with MIME-type detection, proper status codes (200, 403, 404, 413), path-traversal protection and request logging. It has nearly 200 GitHub stars.

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Sources

From the maker's own write-up or code. We summarise what they report; we haven't tested it ourselves.

  • Hacker News: Spent an hour or so working with Claude to write a static web server in COBOLCode or repositorygithub.com
    Repository account: jmsdnns

    The COBOL source and how to run it.

  • Hacker News discussion (4 points)Forum threadnews.ycombinator.com
    HN submitter: jmsdnnsPosted 29 Sept 2025

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Prompt & Solder

An independent community project. Not affiliated with Anthropic.

What this is. Real projects where people used Claude to build, fix, port, revive or take apart something, from jailbroken Kindles to rebuilt DOS games, plus the times it went badly wrong. Every build links to where it was shared, and every source is listed here.

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