Google Antigravity connects to the Equibles MCP server through its built-in MCP settings. You do not need to write a program or install a local server.

## 1. Open the MCP configuration

In Antigravity IDE:

1. Click **…** at the top of the agent side panel.
2. Select **MCP Servers**.
3. Click **Manage MCP Servers → View raw config**.

This opens Antigravity's shared `mcp_config.json` file. The same server will be available in Antigravity, Antigravity IDE, and Antigravity CLI.

## 2. Add the Equibles server

Paste this into the file and save it:

```json
{
  "mcpServers": {
    "equibles": {
      "serverUrl": "https://mcp.equibles.com/mcp"
    }
  }
}
```

> Already have other servers in `mcpServers`? Add only the `"equibles": { ... }` entry beside them instead of replacing the whole file. Antigravity requires `serverUrl` for a remote server; `url` and `httpUrl` do not work here.

Return to **Settings → Customizations → Installed MCP Servers** and click **Refresh**. When Equibles appears, click **Authenticate**, sign in to Equibles in your browser, copy the authorization code, and paste it back into Antigravity.

**Prefer an API key?** Create one at [/dashboard/apikeys](/dashboard/apikeys) (it starts with `eq_` and is shown once), then use:

```json
{
  "mcpServers": {
    "equibles": {
      "serverUrl": "https://mcp.equibles.com/mcp",
      "headers": {
        "Authorization": "Bearer eq_your_api_key"
      }
    }
  }
}
```

Treat this file as a secret when it contains an API key. See [Google's MCP guide](https://www.antigravity.google/docs/mcp) for Antigravity's current configuration screens and file locations.

## 3. Test it

Start a conversation or agent task and ask one of these. Name Equibles in the prompt so Antigravity calls the connected tools instead of answering from memory or searching the web:

- Using Equibles, compare NVDA's latest earnings call with the previous quarter. Build a management accountability scorecard showing what was promised, delivered, missed, or is too early to judge; compare prior guidance with filed results; flag achievements that exceeded or were not foreshadowed by management's prior outlook; explain changes in tone and priorities; and cite every conclusion. — Earnings
- Using Equibles, who are NVIDIA's top institutional holders this quarter? — 13F
- Using Equibles, summarize Microsoft's most recent earnings call. — Earnings

Antigravity asks before using newly connected MCP tools by default. Approve the Equibles call when prompted; you can change that permission later if you want an agent to run without asking each time.

## Troubleshooting

**Equibles does not appear after saving?**

Click **Refresh** under **Settings → Customizations → Installed MCP Servers**. If it is still missing, confirm the file contains valid JSON and the remote address is under `serverUrl`.

**Authentication does not start?**

Use the API-key configuration above, then refresh the server list. Make sure the header begins with `Bearer ` followed by the complete key.

**Antigravity answers without Equibles data?**

Confirm Equibles is enabled under **Installed MCP Servers**, then start the prompt with "using Equibles, ..." so Antigravity selects its tools.

**401 / access denied?**

Click **Authenticate** again, or replace an invalid API key from [/dashboard/apikeys](/dashboard/apikeys). If you are over your daily limit, see [Rate limits](/docs/rate-limits).