Gemini MCP: connect MCP servers to Gemini

Gemini web app (custom apps)

1. On a computer, go to gemini.google.com and click Settings → Connected Apps.
2. Under Custom apps, click Add a custom app and enter the MCP server URL.
3. If the server doesn't support Dynamic Client Registration, click Show more next to Advanced features and enter your OAuth credentials.
4. Click Next and follow the on-screen sign-in. To make sure Gemini uses the app, type @ in your prompt and select it.

According to Google, custom apps currently require a personal Google Account (not a work or school account), being 18 or over and in the US, and Keep Activity turned on. They are English-only for now. You add them in the web app; after that they also work in the Gemini mobile app. Gemini asks you to confirm write actions.

Gemini CLI

1. Add a remote server with gemini mcp add --transport http <name> <url>. Without --scope user the entry goes into the project's .gemini/settings.json; with it, into ~/.gemini/settings.json for all projects.
2. Or edit settings.json yourself: add the server under mcpServers with httpUrl (streamable HTTP) and, for an API key, headers.
3. For OAuth servers, run /mcp auth <name> inside the CLI. /mcp lists your servers and their tools.

gemini mcp add --transport http --scope user \
  --header "X-API-Key: YOUR_API_KEY" \
  anythingmcp https://cloud.anythingmcp.com/mcp/YOUR_SERVER_ID

{
  "mcpServers": {
    "anythingmcp": {
      "httpUrl": "https://cloud.anythingmcp.com/mcp/YOUR_SERVER_ID",
      "headers": { "X-API-Key": "YOUR_API_KEY" }
    }
  }
}

Gemini Enterprise

In Gemini Enterprise a team administrator connects a custom MCP server as a data source. Google marks the feature as pre-GA. It supports only the Streamable HTTP transport, and both the MCP server and the identity provider used for OAuth must be reachable from the internet.