Gmail MCP Server

// Gmail API configuration and utilities export const GMAIL_API_BASE_URL = 'https://gmail.googleapis.com/gmail/v1'; // Common helper to create base headers function createBaseHeaders(accessToken: string): Record<string, string> { return { Authorization: `Bearer ${accessToken}`, Accept: 'application/json', }; } // Common helper to handle API errors async function handleApiError(response: Response): Promise<never> { const errorText = await response.text(); throw new Error(`Gmail API error: ${response.status} ${response.statusText} - ${errorText}`); } // Common helper to parse response based on content type async function parseResponse(response: Response): Promise<unknown> { if (!response.ok) { await handleApiError(response); } const contentType = response.headers.get('content-type'); if (contentType?.includes('application/json')) { const responseText = await response.text(); if (!responseText.trim()) { return {success: true, message: 'Operation completed successfully'}; } try { return JSON.parse(responseText); } catch (error) { throw new Error(`Failed to parse JSON response: ${error instanceof Error ? error.message : String(error)}`); } } return (await response.text()) || 'Success'; } // Utility function to make authenticated API calls export async function makeGmailApiCall( method: 'GET' | 'POST' | 'PUT' | 'DELETE' | 'PATCH', endpoint: string, accessToken: string, body?: unknown, ) { const url = `${GMAIL_API_BASE_URL}${endpoint}`; const headers = createBaseHeaders(accessToken); if (body) { headers['Content-Type'] = 'application/json'; } const fetchOptions: RequestInit = { method, headers, }; if (body) { fetchOptions.body = JSON.stringify(body); } const response = await fetch(url, fetchOptions); return parseResponse(response); }