openapi: 3.1.0 info: title: Gallagher Command Centre REST Access Groups API description: The Gallagher Command Centre REST API provides HTTP functions for querying the Command Centre database and integrating third-party systems with Gallagher's security platform. Supports access control, alarm monitoring, cardholder management, and site management operations. version: 9.0.0 contact: name: Gallagher Security url: https://gallaghersecurity.github.io/ license: name: Proprietary url: https://security.gallagher.com/ servers: - url: https://localhost:8904/api description: Local Command Centre server (default). Replace with your Command Centre server address. tags: - name: Access Groups description: Manage access control groups. paths: /access_groups: get: operationId: listAccessGroups summary: List Access Groups description: Retrieve a list of access groups configured in Command Centre. tags: - Access Groups responses: '200': description: List of access groups returned successfully. content: application/json: schema: type: object properties: results: type: array items: type: object properties: href: type: string id: type: string name: type: string '401': description: Unauthorized.