# Keepsy > Keepsy is a wishlist and save-for-later app for OpoShop stores. Shoppers save what they love with one tap and their list follows them across sessions and devices; merchants see what is most wanted and win those shoppers back with automatic back-in-stock and price-drop reminders. This app is built on the OpoShop platform. It is agent-friendly: the full API is described in OpenAPI and wrapped by an MCP server so an LLM can drive it directly. ## Machine interfaces - API contract (OpenAPI): https://app.keepsyapp.com/openapi.json - API docs (Swagger): https://app.keepsyapp.com/docs - Fuller LLM context: https://app.keepsyapp.com/llms-full.txt - Release notes: https://app.keepsyapp.com/api/release-notes - MCP endpoint (hosted): https://app.keepsyapp.com/mcp — add this URL to Claude or any LLM client to drive the app in natural language. Auth with your own OpoShop store token via Authorization: Bearer . ## Auth Merchants are authenticated by the OpoShop OAuth embed — there is no password login. For the API / MCP endpoint, send your own OpoShop store token as `Authorization: Bearer `.