# toknzer

> Small, local-first web tools. No server, no login, no tracking. Everything runs
> in the browser and your data stays on your device — and the tools are built to be
> driven by agents and MCP clients via documented, portable data formats.

toknzer hosts single-purpose static tools at https://toknzer.com. There is no
backend and no API to authenticate against: each tool reads and writes plain,
documented JSON locally (IndexedDB), and publishes its data schema so any agent or
local MCP server can generate, transform, or consume that data offline.

## Tools

- [Invoice Generator](https://toknzer.com/invoices/): Create, edit and export
  invoices as PDF, fully client-side. Multi-currency, line items, tax/discount/
  shipping, logo. Data format documented below.

## For agents & MCP

- [Invoice JSON Schema](https://toknzer.com/invoices/invoice.schema.json): canonical
  portable invoice document format (JSON Schema 2020-12).
- [Invoice example](https://toknzer.com/invoices/invoice.example.json): a filled
  document conforming to the schema.
- [Invoice tool guide](https://toknzer.com/invoices/llms.txt): how an agent builds,
  validates and hands off an invoice document.
- [MCP server card](https://toknzer.com/.well-known/mcp.json): describes a local
  (stdio) MCP server that produces/validates the invoice format above.
- [Agent skills](https://toknzer.com/.well-known/agents.json): machine-readable
  capability manifest.

## Notes

- All tools are static and free. No accounts, no telemetry, no rate limits.
- Because data is local-first, agents interoperate by exchanging the documented
  JSON format rather than by calling a hosted API.
- Contact: hello@toknzer.com