Connecting Sellforte MCP to Google Gemini

Sellforte MCP can be connected to Gemini Enterprise as a custom MCP server. Unlike Claude or ChatGPT, where each user adds the connector themselves, in Gemini Enterprise the connection is set up once by a Google Cloud administrator and then made available to users in your organization.

For Claude, ChatGPT or another MCP-compatible client, see Connecting Sellforte MCP to your LLM client.

Which Gemini license you need

Custom MCP servers are supported in Gemini Enterprise. The steps in this article follow Google's documentation for the Standard, Plus, Pay-as-you-go and Frontline editions. The Business edition has its own admin flow, described in Google's Gemini Enterprise Business help center.

Gemini in Google Workspace (the Gemini app and the Gemini side panels in Gmail, Docs, Sheets and Slides) does not currently support adding a custom MCP server for work accounts. Google's custom apps feature in the Gemini app is available only for personal Google accounts. If your organization uses Google Workspace without Gemini Enterprise, Sellforte MCP cannot be connected to Gemini at the moment, and your users can connect it through another MCP-compatible client instead.

Before you start

Each user who will query Sellforte MCP needs to accept their invitation first. The invitation email comes from welcome@workos.dev, because Sellforte uses WorkOS to manage MCP access. Ask users to check their junk folder if they cannot find it.

Gemini Enterprise connects to MCP servers with a pre-registered OAuth 2.0 client. Ask your Customer Success Manager for the Sellforte MCP authorization URL, token URL, client ID, client secret and scopes. When you share the redirect URL with Sellforte, use https://vertexaisearch.cloud.google.com/oauth-redirect, which is the redirect URL Gemini Enterprise uses.

The administrator creating the connection needs the Discovery Engine Editor role in the Google Cloud project that hosts your Gemini Enterprise app.

1. Allow custom MCP servers in your organization policy

Gemini Enterprise blocks custom MCP data stores by default. An Organization Policy Administrator needs to turn this off for the project that hosts your Gemini Enterprise app. In the Google Cloud console, open Organization Policies, select the project, and find the policy "Disable custom MCP server connector for Gemini Enterprise". Click Manage Policy, select Override parent's policy, add a rule with enforcement set to Off, and click Set Policy. The policy status should then show Not enforced.

If your project is inside a VPC Service Controls perimeter, or your organization restricts data connectors, you also need to allow the custom_mcp data source and add the Sellforte MCP domain and the authorization and token domains to the allowed egress domains.

2. Add Sellforte MCP as a custom MCP server

In the Google Cloud console, open the Gemini Enterprise page, go to Apps and select your app. Click Connected Data Stores, then New data store. Search for Custom MCP Server, select it, and click Add MCP server.

Under Authentication settings, select OAuth 2.0 and enter the MCP Server URL that matches your Sellforte environment: https://mcp.sellforte.com/mcp for Europe, or https://us.mcp.sellforte.com/mcp for the United States. Then enter the authorization URL, token URL, client ID, client secret and scopes you received from Sellforte.

Click Verify Auth and sign in with an account that has accepted the Sellforte MCP invitation. Select the organization you want to connect to and complete the consent screens. Then click Continue.

Under Configure your data connector, choose a location and give the connector a name such as "Sellforte MCP". Click Create, then open the data store from Connected Data Stores and wait until its state changes to Active.

3. Enable the Sellforte MCP tools

No tools are enabled by default. Open the Sellforte MCP data store, go to the Actions tab and click Reload custom actions. Gemini Enterprise then fetches the list of tools Sellforte MCP offers. Select the tools you want users to have and click Enable actions.

4. Use Sellforte MCP in Gemini Enterprise

Once the tools are enabled, users in your Gemini Enterprise app can use Sellforte MCP in the assistant. The first time they use it, users may be asked to authorize the connector with their own Sellforte MCP account.

Sellforte MCP can also be used in agents built with Workflow Builder. Add an MCP server step to the flow, or open a Gemini agent step, go to Tools and integrations and turn on the Authorize toggle for Sellforte MCP.

5. Test the connection

Ask Gemini a question that needs Sellforte data, for example which channels drove the most incremental revenue in the last quarter, how your latest Meta campaign performed against its baseline, or how reallocating 20% of your TV budget to digital would change expected revenue. If Gemini answers with figures from your Sellforte environment, the connection works.