# Retain > Branded returns & exchanges portal — exchange-first, revenue-protecting. This app is built on the EverBee Store 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://retainreturns.fly.dev/openapi.json - API docs (Swagger): https://retainreturns.fly.dev/docs - Fuller LLM context: https://retainreturns.fly.dev/llms-full.txt - Release notes: https://retainreturns.fly.dev/api/release-notes - MCP endpoint (hosted): https://retainreturns.fly.dev/mcp — add this URL to Claude or any LLM client to drive the app in natural language. Auth with your own EverBee store token via Authorization: Bearer . ## Auth Get an access token via POST /api/auth/login, then send it as `Authorization: Bearer ` on /api/* requests (and to the /mcp endpoint).