CalcBright
Free, keyless JSON API and MCP server exposing 167+ calculators to apps and AI assistants.
CalcBright provides a collection of 167+ online calculators and converters (finance, salary, tax, unit conversion, and more), each available programmatically. It offers an MCP server at https://calcbright.com/mcp (Streamable HTTP, no authentication) with typed inputs for all tools, a JSON API at https://calcbright.com/api/calc/{tool}?param=value returning summary, structured result, inputs, and a result URL, an OpenAPI 3.1 spec, /llms.txt and /llms-full.txt files for LLM crawlers, and free embeddable calculator pages. The API is free for personal, educational, and commercial use with fair-use guidelines (link to result URLs, cache where possible, keep traffic reasonable).
- Category
- MCP servers
- Pricing
- free
- Free tier
- yes
- API
- yes
- MCP server
- yes
- SDK
- no
- Open source
- no
Listed 2026-10-26 · last verified 2026-10-26 · extracted by @cf/zai-org/glm-5.3-flash · confidence 0.95
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API
curl https://toolgrep.com/api/products/calcbright