Connect Antigravity to thirds.ai

Use with your agent

Give this prompt to your AI agent. The agent does the task for you.

Read https://thirds.ai/docs/mcp/antigravity and help me connect Antigravity to thirds.ai with an API key

Use Google Antigravity to build templates and create PDFs or images. Create an API key on the API keys page first. Each successful PDF or static image costs one credit.

Install the server

In Antigravity IDE, open the agent side panel, choose MCP Servers, then Manage MCP Servers, then View raw config. Add this remote server to ~/.gemini/config/mcp_config.json, or to .agents/mcp_config.json in one workspace:

{
  "mcpServers": {
    "thirds": {
      "serverUrl": "https://thirds.ai/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_API_KEY"
      }
    }
  }
}

Replace YOUR_API_KEY with your key. Antigravity requires serverUrl for Streamable HTTP. It does not read url or httpUrl. Use the headers field, not Antigravity's OAuth mode. See Google's Antigravity MCP guide. Restrict the config file to your user, and do not commit the key.

Check the connection

Reload the MCP servers list. Ask Antigravity to list the thirds.ai tools.

Read the main MCP guide before you start paid work.

FAQ

Why does Antigravity ignore a config copied from Cursor?

Cursor uses url. Antigravity needs serverUrl. Change the field name and keep the same https://thirds.ai/mcp value.

Why should I avoid OAuth here?

thirds.ai MCP authenticates with an API key in a bearer header. Custom headers match that model. Do not use Antigravity OAuth or Google credentials for this server.

Does connecting spend credits?

No. Connecting and listing tools don't spend credits. AI template work and successful renders can. Ask your agent to show the action and the cost before it starts paid work.