Google Calendar в Claude Code через MCP

integration

add-gcal-tool is a Claude Code skill that integrates Google Calendar as an MCP tool, enabling an agent to list, search, and create events as well as run free/busy queries. Authentication is handled through OneCLI: raw OAuth credentials never enter the agent container — real tokens are injected only at request time. The skill mirrors the stub pattern of add-gmail-tool and supports multiple calendars and accounts simultaneously. It is designed for personal assistants and scheduling agents that need secure, credential-safe access to a user's calendar without storing sensitive tokens inside the container.