Access the Vonage Tooling MCP Server on Google Antigravity

Introduction

In my latest blog post, I showed you how the Vonage Tooling Model Context Protocol (MCP) Server can trigger a real outbound voice call using Claude Desktop. In today’s blog post, I’ll show you how to access it on Google Antigravity, and the example I’ll focus on is to send an SMS using just a natural language prompt to interact with Gemini without writing code.

Prerequisites

Before getting started, you’ll need:

• Google Antigravity installed

• Node.js installed

• A Vonage account

Get Your API Key And Secret

Purchase a Vonage Virtual Phone Number

Add the Vonage Tooling MCP Server to Antigravity

Antigravity is an agentic IDE from Google that makes it easy to connect external tools via the MCP. We just need to point it to the Vonage server.

Open the MCP store via the “…” dropdown at the top of the editor’s side panel in Antigravity.

Google AntigravityClick on “Manage MCP Servers”.

Manage MCP Servers TabClick on “View raw config”. This will open your mcp_config.json file.

Manage MCP serversAdd the following block of code, updating it with your specific Vonage credentials:

{
  "mcpServers": {
    "vonage-tooling": {
      "command": "npx",
      "args": ["-y", "@vonage/vonage-mcp-server-api-bindings"],
      "env": {
        "VONAGE_API_KEY": "YOUR_API_KEY",
        "VONAGE_API_SECRET": "YOUR_API_SECRET"
       }
     }
   }
}

Save the file. Antigravity will automatically detect the changes and initialize the MCP server in the background.

Config File

Send an SMS via Gemini

Now that the setup is done, let’s test it out. Open the Antigravity Agent interface and ensure that Gemini is selected. Then type something along the lines of:
“Use the Vonage tool to send an SMS from [YOUR_VONAGE_NUMBER] to +447XXXXXXXXX and say: Hello, this is a test message sent by Gemini straight from Antigravity!”

Note: Writing the message without specifying YOUR_VONAGE_NUMBER worked for me whilst testing because I simply had one virtual phone number purchased in my account, but if you have more than one, it would be ideal to specify which phone number or to which application ID it’s linked to.

Gemini will identify the SMS tool from the Vonage Tooling MCP, handle the formatting, and make the API call.

Sending Vonage SMS Test

Explore Other Vonage MCP Tools in Antigravity

As you are connected to the Vonage MCP server, you can ask Gemini to check your account balance, list your applications, or pick numbers just as you normally would type when writing to an LLM.

Check out this Introduction to the Vonage Documentation and Tooling MCP Servers to understand what MCP is and where it fits alongside UIs and APIs, how the Documentation MCP Server gives AI agents grounded, up-to-date access to official Vonage docs, and how the Tooling MCP Server lets AI agents safely perform real actions using your Vonage account.

Conclusion

At this point, I’ve shown how to use the Vonage MCP Server on so many different platforms: Postman, Claude Desktop, and today Antigravity! Go ahead and explore other tools and other MCP Servers!