# KLAIM Amsterdam > Streetwear, sneakers, slides and accessories from the online store and Kalverstraat 163, Amsterdam. ## When to use this store Find KLAIM products, compare live variants and prices, answer store-policy questions, and help a buyer enter the supported Shopify shopping flow. Read the guide before any shopping tool call; purchase and payment require explicit buyer authorization. ## Developer resources - [Developer portal](https://klaimamsterdam.com/developers): quickstart, authentication, errors and testing. - [OpenAPI](https://klaimamsterdam.com/openapi.json): existing HTTP operations with typed schemas. - [KLAIM agent guide](https://klaimamsterdam.com/klaim-agent-guide.md): when to use KLAIM and how to call. - [Native agent instructions](https://klaimamsterdam.com/agents.md): Shopify shopping requirements. - [UCP profile](https://klaimamsterdam.com/.well-known/ucp): canonical native MCP endpoint and supported versions. - [Authentication](https://klaimamsterdam.com/pages/api-authentication): provider credentials and least-privilege access. - [Errors](https://klaimamsterdam.com/pages/api-errors): JSON-RPC errors, missing products and backoff. - [Sitemap](https://klaimamsterdam.com/sitemap.xml): public products and pages. This supplements Shopify's platform-managed /llms.txt and /agents.md. Public discovery and product reads require no KLAIM key. KLAIM has no dedicated checkout sandbox or developer subscription.