# Precise Calculator: public access

No account, agent registration, login, API key or OAuth token is needed to read guides, fetch the public discovery API, or use the browser calculators.

- Catalog: https://precisecalculator.com/api/v1/calculators.json
- API description: https://precisecalculator.com/api/openapi.json
- Agent instructions: https://precisecalculator.com/.well-known/agent-skills/precise-calculator/SKILL.md
- Documentation: https://precisecalculator.com/docs/agents/

The API supports discovery GET requests, not remote calculation POST requests. Calculations take place in the browser. There are no protected APIs, authorization servers, issued tokens or remote MCP server in this release. Do not submit secrets or try to register a client at a fabricated OAuth endpoint.

Contact: contact@PreciseCalculator.com