# StillDeep > StillDeep is a headless point of sale with business logic, security, reports and communication built. Vibe-code the screen with Claude, Codex or Cursor. StillDeep is in development (version 0); no customer is deployed yet. Each link is the Markdown version of a page. Prices come live from the StillDeep catalog: read them on the pricing page. Version française : https://stilldeeppos.com/fr/llms.txt ## Start here (coding agents) - [Build a register screen on StillDeep](https://stilldeeppos.com/docs/build-a-client.md): From the stilldeep.v1 .proto files to a first finalized sale: generate the client, open a shift, fill a cart, take a payment and listen to events. - [Docs MCP server](https://stilldeeppos.com/mcp): read-only, Streamable HTTP; tools search_docs, read_page, list_pages, get_contract. Claude Code: `claude mcp add --transport http stilldeep https://stilldeeppos.com/mcp` - [Agent skill: stilldeep-pos-screen](https://stilldeeppos.com/.well-known/agent-skills/stilldeep-pos-screen/SKILL.md): how to build a register screen on the stilldeep.v1 contract, step by step. ## Product - [Vibe-code your point of sale, the engine is built](https://stilldeeppos.com/index.html.md): StillDeep is a headless point of sale with business logic, security, reports and communication built. Vibe-code the screen with Claude, Codex or Cursor. - [Features of the StillDeep point of sale](https://stilldeeppos.com/features.md): Sales, taxes, offline mode, ticketing, retail, rentals, appointments, reservations, receipts and printing: what the StillDeep engine does for every register. - [StillDeep architecture: server, registers and screens](https://stilldeeppos.com/architecture.md): How StillDeep is built: one server per business, registers that sell offline, a gRPC contract for every screen, and what is delivered or still in progress. - [Build your point-of-sale screen on StillDeep](https://stilldeeppos.com/developers.md): Generate a StillDeep client from the gRPC contract in TypeScript, Python, Go, .NET, Java or Rust, or link the .NET libraries in-process. - [Security of the StillDeep point of sale](https://stilldeeppos.com/security.md): Registers that never touch the database, a server that re-checks every sale, signed offline codes, cards kept out of reach, post-quantum in progress. - [StillDeep AI: a local assistant for your business](https://stilldeeppos.com/ai.md): An optional AI assistant on your own network: it sets up a new business, answers staff, drives the Admin and helps at the register, on local models. - [StillDeep pricing](https://stilldeeppos.com/pricing.md): StillDeep licenses per register for 1, 2 or 3 years: the point of sale and its modules, paid by card. Live catalog prices, before taxes. - [StillDeep documentation](https://stilldeeppos.com/docs.md): Guides to understand StillDeep, build a register screen, write extensions and run a business server, plus the gRPC API reference. - [About StillDeep](https://stilldeeppos.com/about.md): StillDeep is a point of sale built in Quebec, Canada, for businesses that cannot stop selling and teams that want to own their screens. - [The StillDeep logo and what it means](https://stilldeeppos.com/logo.md): What each part of the StillDeep logo stands for: the code and sale sign, the wave on the surface, the four depths below and the AI wave. ## Documentation - [StillDeep core concepts](https://stilldeeppos.com/docs/concepts.md): The vocabulary of StillDeep: business server, registers, shifts, carts, sales, the outbox, printed numbers, the proxy and modules. - [Extend StillDeep with extensions](https://stilldeeppos.com/docs/extensions.md): Write .NET extensions that hook into sale actions, add Admin sections and pages, ship catalog items, and get installed from the extension registry. - [Install and operate a StillDeep server](https://stilldeeppos.com/docs/self-hosting.md): What runs on the business server and on each register, how StillDeep is configured, where secrets live and how health is checked. ## API reference (French) - [StillDeep — API gRPC Reference](https://stilldeeppos.com/fr/docs/reference/grpc.md): Référence générée du contrat gRPC stilldeep.v1 : services, RPC, messages et énumérations. - [SDK StillDeep — Generer un POSClient dans n'importe quel langage](https://stilldeeppos.com/fr/docs/reference/sdk.md): Générer un client StillDeep dans n'importe quel langage à partir des fichiers .proto. - [SDK StillDeep — Client TypeScript / Node.js](https://stilldeeppos.com/fr/docs/reference/sdk/typescript.md): Client TypeScript et Node.js : génération du code, panier, flux d'événements. - [SDK StillDeep — Client Python](https://stilldeeppos.com/fr/docs/reference/sdk/python.md): Client Python : grpcio-tools, génération du code, premier panier. - [SDK StillDeep — Client Go](https://stilldeeppos.com/fr/docs/reference/sdk/go.md): Client Go : protoc-gen-go-grpc, génération du code, premier panier. ## gRPC contract (stilldeep.v1, plain text) - [ageverification.proto](https://stilldeeppos.com/contracts/ageverification.proto) - [appointment.proto](https://stilldeeppos.com/contracts/appointment.proto) - [card.proto](https://stilldeeppos.com/contracts/card.proto) - [catalog.proto](https://stilldeeppos.com/contracts/catalog.proto) - [common.proto](https://stilldeeppos.com/contracts/common.proto) - [config.proto](https://stilldeeppos.com/contracts/config.proto) - [device.proto](https://stilldeeppos.com/contracts/device.proto) - [events.proto](https://stilldeeppos.com/contracts/events.proto) - [extensions.proto](https://stilldeeppos.com/contracts/extensions.proto) - [inventory.proto](https://stilldeeppos.com/contracts/inventory.proto) - [language.proto](https://stilldeeppos.com/contracts/language.proto) - [member.proto](https://stilldeeppos.com/contracts/member.proto) - [receipt.proto](https://stilldeeppos.com/contracts/receipt.proto) - [rental.proto](https://stilldeeppos.com/contracts/rental.proto) - [report.proto](https://stilldeeppos.com/contracts/report.proto) - [sales.proto](https://stilldeeppos.com/contracts/sales.proto) - [scheduling.proto](https://stilldeeppos.com/contracts/scheduling.proto) - [shift.proto](https://stilldeeppos.com/contracts/shift.proto) - [sync.proto](https://stilldeeppos.com/contracts/sync.proto) - [user.proto](https://stilldeeppos.com/contracts/user.proto) - [All files (zip)](https://stilldeeppos.com/downloads/stilldeep-contracts.zip) ## Optional - [Full text](https://stilldeeppos.com/llms-full.txt): every page above in one Markdown file - [Privacy policy](https://stilldeeppos.com/privacy.md): What personal information the StillDeep website collects, why, where it is kept, who sees it and how to exercise your rights under Quebec's Law 25. - [Terms of use](https://stilldeeppos.com/terms.md): The rules for using the StillDeep website and account, including the test mode in which no card is charged. - [Accessibility](https://stilldeeppos.com/accessibility.md): How the StillDeep website follows WCAG 2.2 level AA, what is known to be missing and how to report a barrier.