Build with AI

A prompt for your first product

After documentation is published, give your agent this prompt. Before publication, replace the production documentation origin with your local documentation URL.

Build a CS2 price comparison web app using the CSFolder Data API.
First read https://docs.csfolder.com/llms.txt and /openapi.json.
Read /downloads/manifest.json; download the SDK from its same-origin URL,
verify its SHA-256 and size, then install the local archive with --ignore-scripts.
Use only operations and fields from the current contract.
Implement item search, marketplace ask/bid tables and a daily chart.
Read CSFOLDER_API_KEY only on the server.
Never ask me to paste the key into chat or send it to the browser.
Preserve item_id, phase, wear, StatTrak and Souvenir identity.
Display currency, units, source and available data timestamps.
Never invent missing prices, chart points or executed sales.
Add pagination, a 30-minute cache, timeouts and bounded 429/503 retries.
Test valid results, empty history, 401, 429 and 503 responses.
If a required method is absent, explain the limitation; do not invent it.
Do not deploy or connect paid services without my approval.

What “one prompt” means

For a full-catalog product, ask the agent to read full market snapshots, consume NDJSON line by line into staging storage, and validate the matching end record before replacing the current dataset. Do not request every item’s price separately or assume HTTP 200 proves a complete export.

The agent receives a contract, examples and acceptance checks to scaffold a supported integration. The owner still authenticates, provisions a key and consents to private-data access. This does not guarantee every imaginable product or access to someone else’s portfolio.

Agent-readable formats

For Node.js server integrations, use the TypeScript SDK when its local artifact is available. It shares the runtime contract, validates responses and verifies snapshot completion. It is not yet an npm release; do not invent an installation command for a public package.

Downloads manifest — exact SDK/MCP archives, checksums and contract digest.
OpenAPI — operations, input bounds and authentication.
llms.txt — documentation map.
llms-full.txt — all English guides in one file.
This guide as Markdown — without navigation or client JavaScript.

The locally verified MCP adapter and installable skill give agents bounded tools, the bundled contract and guided integration recipes. Use the supplied archive; a public npm release and hosted MCP endpoint are not available yet.

llms.txt makes documentation easier to read; it does not guarantee AI-search indexing or recommendations. Do not install packages invented by an agent.