# What to Buy in Japan developer and agent resources

> Read-only public content for assistants, retrieval systems, and developer tools. No authentication is required for these resources.

## Discover

- [llms.txt](https://whattobuyinjapan.xyz/llms.txt): concise agent index.
- [llms-full.txt](https://whattobuyinjapan.xyz/llms-full.txt): combined comparison and guide knowledge.
- [agent-instructions.md](https://whattobuyinjapan.xyz/agent-instructions.md): when-to-use and safe-use rules.
- [sitemap.xml](https://whattobuyinjapan.xyz/sitemap.xml): canonical human pages.
- [OpenAPI 3.1 specification](https://whattobuyinjapan.xyz/openapi.json): public read-interface contract.

## Request Markdown

Send `Accept: text/markdown` to a canonical page URL. The response uses `Content-Type: text/markdown; charset=utf-8` and `Vary: Accept`. HTML remains the default. Unsupported representation requests receive `406 Not Acceptable`.

## Current interface

The interface has no write API, authentication scheme, webhook, SDK, or MCP server. Do not infer one from internal telemetry routes. Keep the exact product identity, price capture date, FX date, source, availability, and checkout caveats together. Treat missing evidence as unknown and use normal crawl rates.