# Tafla

> Tafla shows the working behind a number. A calculation is laid out as givens and steps with their formulas, walked through in captions or a voice, and stays live: drag an input and every step recalculates. A calculation engine computes every value; no language model ever supplies a number.

## For agents

- [Tafla for agents](https://www.tafla.is/agents.md): hand in a calculation you worked out and get a link to a walkthrough of it. One MCP tool, explain_calculation, on an HTTP MCP server at https://www.tafla.is/api/mcp, signed in by OAuth as the user's Tafla account. Claude Code: `claude plugin marketplace add hoddmachine/tafla-plugin`, `claude plugin install tafla@tafla`, then `claude mcp login plugin:tafla:tafla` to sign in. The setup page in the browser is https://www.tafla.is/agents; the .md is the same text for agents.
- [The skill](https://github.com/hoddmachine/tafla-plugin/blob/main/plugins/tafla/skills/tafla/SKILL.md): when to offer a walkthrough, what to send, and what to do when the server is missing or signed out. Part of the plugin; the raw file is https://raw.githubusercontent.com/hoddmachine/tafla-plugin/main/plugins/tafla/skills/tafla/SKILL.md.
- [Server manifest](https://www.tafla.is/.well-known/mcp.json): the MCP server's name, address and transport, in the MCP registry's server.json shape. A GET on https://www.tafla.is/api/mcp answers with the same pointers.

## About

- [How Tafla works](https://www.tafla.is/how-it-works): the path a question takes through the language model, the engine, the whiteboard and the voice.
- [About Tafla](https://www.tafla.is/about): the story behind it.
- [Terms and privacy](https://www.tafla.is/privacy)