# SIS (Super Invoicing System)

> SIS is a web app at https://sistudio.app for freelance videographers, photographers and small studios in Malaysia. It handles clients, jobs, quotations, invoices, payments received, expenses, claims and reports. Amounts are in Ringgit (RM). The app is in English and Simplified Chinese.

- Plans: Basic RM 199 a year and Pro RM 399 a year, each with a 7-day free trial.
- An AI can connect over MCP at https://sistudio.app/api/mcp with SIS Pro.
- The full guide lists only features that exist today. If a feature is not in it, SIS does not have it.

## Guides

- [Full guide for AI assistants](https://sistudio.app/llms-full.txt): how SIS works, where every screen is, the day-1 checklist, the daily and monthly routines, Malaysia notes and the MCP tools.
- [AI guide page](https://sistudio.app/ai): connection steps for Claude, ChatGPT and other MCP apps, with copy-paste prompts.
- [AI guide page in Simplified Chinese](https://sistudio.app/zh/ai): the same page in Chinese.

## Connect

- [MCP endpoint](https://sistudio.app/api/mcp): Streamable HTTP. Only the studio owner can connect: sign in with OAuth 2.1 (dynamic client registration and PKCE) as the owner, or send Authorization: Bearer with a token the owner makes in SIS. Each connection is locked to one studio.

## Optional

- [Trust and security](https://sistudio.app/trust): where data is kept and who can reach it.
- [Terms of service](https://sistudio.app/terms-of-service)
- [Privacy policy](https://sistudio.app/privacy-policy)