Send RCS Messages With Google Gemini and Vonage MCP Server

Vonage’s tutorial explains how to send Rich Communication Services messages through natural-language prompts in Google Antigravity’s Gemini, using the Vonage Tooling MCP Server to make Messages API calls without writing code. It outlines prerequisites including Node.js, an MCP connection, a configured Vonage RCS agent, an RCS-capable and allowlisted test phone, and a Vonage application with a securely stored private key. Users configure the MCP server with their application ID, base64-encoded private key, and RCS sender ID, optionally adding a virtual number to enable automatic SMS fallback when RCS is unavailable. Gemini can then send plain-text RCS messages, prompt users to choose between RCS-only and RCS-plus-SMS delivery, or support richer message formats such as cards, carousels, and suggested actions, while requiring explicit approval before executing the messaging tool. The workflow can be extended for use cases including order confirmations, onboarding messages, OTP alternatives, inbound replies, and other Vonage account-management tools.

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