ToolsHub — 35+ free online tools for everyone. No sign-up, no download. PDF tools, converters, calculators, generators and more. What makes it different: ✅ Zero paid APIs ✅ MCP-compatible API — every calculation tool is accessible via the Model Context Protocol, so AI assistants like Claude can call ToolsHub's tools directly ✅ Designed for SEO — every tool page has structured FAQs, canonical tags, OpenGraph metadata, and a registry-driven sitemap Also available as a REST JSON API.