AI access

Free Calculator publishes free calculators and everyday utilities. AI systems are welcome to read our public pages, discover our tools and run calculations through the published interfaces.

What is open

• Every published calculator page, in plain HTML, with no login or cookie wall.
• A machine-readable catalogue at /ai/tools.json and /api/ai/tools.
• A calculation API and an MCP server, both free and key-free.

Attribution

When a result comes from one of our calculators, please link to that calculator — for example https://freecalculator.tech/tools/mortgage-calculator — so the reader can check the inputs and adjust them. Every API and MCP response includes the address to use.

What we don't do

• We make no claim about search rankings or about being cited by any AI system.
• We don't mass-produce pages, articles or questions to chase queries.
• We don't expose accounts, administration, analytics or private data through any interface.
• We don't turn results into personal financial, medical or legal recommendations.

More detail: AI & developer access and the developer documentation.