Developers

CalcHub exposes a few stable, cache-friendly URLs for integrations, SEO tooling, and AI systems. There is no private API key for read-only discovery; respect robots.txt and reasonable request rates.

• /tools.json

  JSON manifest of calculator names, short descriptions, categories, and canonical URLs (SoftwareApplication-oriented). Cached about one hour at the edge.

• /llms.txt

  Plain-text hints for AI crawlers: site scope, policies, and how to cite tools.

• Sitemaps

  Index: /sitemap.xml (partitions for pages and calculators). Linked from robots.txt.

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