Automate messaging in n8n

Use the MCP Client Tool node in n8n, point it at the SendAPI endpoint, and your workflows can send WhatsApp, SMS, OTP, and email — no custom function nodes, no code.

Connect n8n to SendAPI

Endpoint: https://sendapi.co/mcp
Header:   Authorization: Bearer sk_live_xxxxxxxx

Then just ask

• "When a new row hits the sheet, send the lead a welcome SMS."
• "On a failed payment webhook, email the customer a retry link."
• "Notify the ops WhatsApp group when the queue backs up."

What you can build with n8n

• Trigger-based messaging — Fire SMS, email, or WhatsApp off any n8n trigger — webhooks, schedules, app events.
• AI Agent node — Give an n8n AI Agent the SendAPI tools so it decides when and what to send.
• No-code sends — Skip HTTP Request boilerplate; the MCP node exposes typed tools directly.

Pairs with the SendAPI MCP server. Get your API key to start.