API ReferenceGoogleGmailAPI reference for Google Gmail endpoints. 4 endpointsGET/api/v1/gmail/messagesList emails from Gmail inbox with summary info (from, to, subject, date, snippet, labels, read/starred status). Supports search queries using Gmail syntax.GET/api/v1/gmail/messages/{messageId}Get a specific email by its message ID. Returns full message with body, headers, attachments metadata, and labels.GET/api/v1/gmail/messages/{messageId}/attachments/{attachmentId}Download an email attachment by message ID and attachment ID. Returns base64-encoded content.POST/api/v1/gmail/sendSend an email via Gmail. Supports attachments, multiple CC/BCC recipients, and reply-to.GoogleAPI reference for Google endpoints.CalendarAPI reference for Google Calendar endpoints.