# mcp.ai > One link. Every connector. Browse MCP servers, plug them into a single MCP endpoint, and call them over MCP or REST. ## How to use any server - MCP protocol: connect your client to the server's remote endpoint (https://api.mcp.ai/{slug}). - REST API: every tool is a POST under https://api.mcp.ai/api/{slug}/… (discover via GET https://api.mcp.ai/api/{slug}/_endpoints), authed with 'Authorization: Bearer sk_live_…'. Keys at https://mcp.ai/settings/api-keys. - Per-server spec for AI agents: https://mcp.ai/{slug}/llms.txt ## Servers - [Banco MCP](https://mcp.ai/banco): Connect Nubank, Itaú, Inter and 800+ institutions to your AI via BACEN-regulated Open Finance. One link, read-only. — spec: https://mcp.ai/banco/llms.txt - [Gmail](https://mcp.ai/gmail): Read, search and send Gmail messages straight from your AI agent. — spec: https://mcp.ai/gmail/llms.txt - [Google Sheets](https://mcp.ai/googlesheets): Read, create and update Google Sheets spreadsheets straight from your AI agent. — spec: https://mcp.ai/googlesheets/llms.txt - [WhatsApp](https://mcp.ai/whatsapp): Send and read WhatsApp messages, manage chats and contacts from your agent. — spec: https://mcp.ai/whatsapp/llms.txt - [Google Drive](https://mcp.ai/googledrive): Search, read and organize Google Drive files from your AI agent. — spec: https://mcp.ai/googledrive/llms.txt