# LibreChat with zurelay > Open-source, multi-user chat with agents. Source: https://zurelay.com/docs/integrations/librechat The examples use `claude-opus-5-5`. Any model ID from [the models page](https://zurelay.com/docs/models) works. ## Set it up 1. Add `ZURELAY_API_KEY=…` to LibreChat’s `.env`. 2. Add zurelay as a custom endpoint in `librechat.yaml`. With `fetch: true`, the full model list loads from zurelay. 3. With Docker, mount the file in `docker-compose.override.yml`, then run `docker compose down && docker compose up -d`. ## Configuration **librechat.yaml** (`librechat.yaml`): ```yaml version: 1.3.17 endpoints: custom: - name: "zurelay" apiKey: "${ZURELAY_API_KEY}" baseURL: "https://api.zurelay.com/v1" models: default: ["claude-opus-5-5"] fetch: true titleConvo: true titleModel: "deepseek-v4.1-flash" modelDisplayLabel: "zurelay" ``` **docker-compose.override.yml** (`docker-compose.override.yml`): ```yaml services: api: volumes: - type: bind source: ./librechat.yaml target: /app/librechat.yaml ``` [LibreChat’s own docs](https://www.librechat.ai/docs/configuration/librechat_yaml/object_structure/custom_endpoint)