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Headless POS for AI coding agents

Vibe-code your POS in minutes.The rest is built.

Business logic, security, reports and communication are done. Describe your screen to Claude, Codex or Cursor: your agent reads our docs, plugs into the gRPC contract and ships a register that sells, even offline.

Give it to your agentSee pricing
  • Business logic
  • Security
  • Reports
  • Communication

Paste. Describe. Sell.

Give StillDeep to your coding agent

The prompt points your agent to docs written for machines, the gRPC contract and the StillDeep skill. Fill in the brackets: the agent does the rest, and the engine checks every sale.

Prompt 
Build the point-of-sale screen of my business on StillDeep.
1. Read https://stilldeeppos.com/llms.txt, then the skill https://stilldeeppos.com/.well-known/agent-skills/stilldeep-pos-screen/SKILL.md.
2. Use the stilldeep.v1 gRPC contract (https://stilldeeppos.com/contracts/sales.proto and the others). Never compute prices or taxes in the screen.
My business: [what you sell, how customers pay].
The screen: [touch register, kiosk or web shop], in [language or framework].
Open in Cursor Open in Claude Code Open in Codex llms.txt SKILL.md
Claude Code
claude mcp add --transport http stilldeep https://stilldeeppos.com/mcp
Codex ~/.codex/config.toml
[mcp_servers.stilldeep]
url = "https://stilldeeppos.com/mcp"
Gemini CLI
gemini mcp add --transport http stilldeep https://stilldeeppos.com/mcp
Grok Build
grok mcp add --transport http stilldeep https://stilldeeppos.com/mcp

One contract · stilldeep.v1

One engine, every screen

Self-service kiosk, touch register or web shop: every screen speaks the same gRPC contract, and the engine applies the same rules, taxes and receipts everywhere.

Still waters run deep. A simple surface your agent codes in minutes, and a deep foundation already built underneath: StillDeep handles everything a register needs, so your team only designs the screen your business deserves.

Already done for you

Business logic

Sales, Canadian sales taxes, discounts, split payments, refunds, reservations, ticketing with seats, rentals, appointments and shifts. The engine re-checks every sale, whatever the screen sends.

Security

Registers never touch the database, the server validates every input, receipts and tickets carry signed codes checked offline, and permissions follow each role. Hybrid post-quantum is in progress.

Reports

The Report web app shows sales by day and period, shifts, taxes, top products, inventory and employees, with a transaction audit. Shift summaries, sales by payment method and tips also come over gRPC for your own dashboards.

Communication

Offline first: each register keeps an outbox and syncs with the business server when the network comes back. Live events, chat between registers and an optional local AI assistant.

Who it is for

Developers and vibe coders

A serious point-of-sale engine behind your agent: no taxes, offline sync or printing to rebuild once more.

Recreation and tourism

Parks, sugar shacks, ski hills, mini-golf, escape rooms, cinemas and shows, self-service kiosks.

Retail

Stores with inventory, barcodes, lots and expiry dates, products sold by weight.

Services by appointment

Grooming salons, hair salons, workshops, with qualified staff and an agenda.

How it works

Install the server

One server per business: a PostgreSQL database, the Admin web app to configure everything and the Report web app for the numbers.

Give StillDeep to your agent

Paste the prompt above, or connect the read-only docs MCP server. Your agent reads the guide, the skill and the .proto files, then writes the screen in the language you choose.

Sell

Run the screen on the register: it syncs with the server and keeps selling on its own when it has to.

What is ready today

StillDeep is in development (version 0) and no customer is deployed yet.

Built and tested

The sales engine, offline synchronization, the database proxy, receipts and printing, the receipt designer, extensions and the Admin.

In progress

Hybrid post-quantum security.

Planned

Docker packaging and signed per-register license activation.

The architecture page tells exactly what is delivered and what is not.

Ready to vibe-code your register?

Create your account now: it takes one minute and lets you buy your licenses when you are ready. Create an account or read the documentation.