Connect AI Apps

How to Connect Antigravity to MewCP

Add MewCP to Antigravity once, and Antigravity's agent can use every app you have connected in MewCP: Gmail, Calendar, Slack, GitHub and the rest. Antigravity connects to MewCP directly over HTTP, so there is nothing to install.

Antigravity 2.0, the Antigravity IDE and the Antigravity CLI all read the same mcp_config.json, so one setup covers all three.

Before you start

Antigravity installed (download)
A API Key from Dashboard → API Keys, see API Key
At least one app connected in the dashboard under Servers

Set up MewCP

Open mcp_config.json

Where you use Antigravity	How to open the file
IDE	Click … at the top of the agent side panel, select MCP Servers → Manage MCP Servers → View raw config
CLI or Antigravity 2.0	Open `~/.gemini/config/mcp_config.json` in a text editor

That file applies to every project. To add MewCP to one project only, use .agents/mcp_config.json inside it instead. Create the file if it does not exist.

Add MewCP

Paste this into the file and replace API_KEY with your key:
```
Code
{
  "mcpServers": {
    "mewcp": {
      "serverUrl": "https://gateway.mewcp.com/personal/mcp",
      "headers": {
        "Authorization": "Bearer API_KEY"
      }
    }
  }
}
```
Already have an mcpServers section? Add only the "mewcp": { ... } entry inside it.

Antigravity reads the address from serverUrl. Guides for other apps use url, which Antigravity does not read.
Load it

Save the file. In Antigravity 2.0, open Settings → Customizations and click the refresh button under Installed MCP Servers. In the CLI, type /mcp and reload the server configuration.

This is the entire configuration. One entry reaches every app you have connected, and connecting another app later needs no change here.

Antigravity stores the key as plain text in this file. Keep mcp_config.json out of version control, especially a project's .agents/mcp_config.json.

Check it works

Antigravity 2.0: MewCP appears under Settings → Customizations → Installed MCP Servers, switched on.
IDE: MewCP appears under … → MCP Servers.
CLI: type /mcp and check MewCP shows as active.

You will see four tools, not the tools of every app: search, get_schema, list_accounts and call_tool. That is expected. The agent uses them to find and run the right tool for whatever you ask. See How MewCP works.

Then ask the agent for something from an app you have connected:

Code
What is on my calendar tomorrow?

Antigravity asks for your approval before each MCP tool call by default. To let MewCP's tools run without asking, allow mcp(mewcp/*) in your permissions policy.

Troubleshooting

MewCP is not listed

Check the entry uses serverUrl, not url or httpUrl.
Check the file is valid JSON. A missing comma, or a trailing comma after the last entry, stops it from loading.
Older Antigravity versions kept the file at ~/.gemini/antigravity/mcp_config.json. In the IDE, View raw config always opens the file your version reads, so edit that one.

MewCP shows as disconnected

Usually MewCP rejected the key. MewCP does not use OAuth, so an Authenticate button next to it will not help: fix the key instead.

Check the header reads Bearer followed by the whole key, which starts with mcp_live_.
A 403 that says the billing period is not active means your MewCP plan needs renewing in the dashboard.

In the CLI, /mcp shows each server's connection log, which includes the error MewCP returned.

MewCP is listed but its tools never run

Check MewCP is switched on under Installed MCP Servers, and that "disabled": true or a disabledTools list is not set on the mewcp entry.

Last checked against Antigravity's documentation on 13 October 2026.

Last modified on October 15, 2026

OpenClaw Hermes