import FeatureAvailability from '@site/src/components/FeatureAvailability';

Glean Plugin

Note: Ask DataHub Plugins is currently in Private Beta. To enable this feature, please reach out to your DataHub customer support representative.

The Glean Plugin connects Ask DataHub to your organization's Glean instance, bringing enterprise knowledge search into your data conversations.

Why Connect Glean?

With the Glean plugin enabled, Ask DataHub can:

Search organizational knowledge — find relevant documentation, wikis, Slack threads, and other content indexed by Glean
Supplement metadata with context — answer questions that require both data catalog knowledge and organizational documentation
Bridge the gap between your data ecosystem and your team's tribal knowledge stored across tools

Example prompts:

"Find our internal documentation about the data retention policy"
"Search for any runbooks related to the revenue pipeline"
"What does our wiki say about the customer segmentation methodology?"
"Find Slack discussions about the recent data migration"

Prerequisites

A Glean account with the MCP server enabled (see Glean's MCP documentation)
DataHub Cloud with Ask DataHub Plugins enabled
Platform admin access in DataHub to configure the plugin

Admin Setup

The Glean plugin is the simplest to set up. DataHub supports OAuth discovery and automatic client registration for Glean — meaning DataHub will automatically discover the OAuth endpoints, available scopes, and register a client on your behalf. No manual OAuth configuration is required.

Step 1: Get the Glean MCP Server URL

Obtain the MCP server URL from your Glean instance. You can find this in your Glean settings under MCP Configurator (accessible from your profile settings), or refer to Glean's MCP setup guide.

Step 2: Create Plugin in DataHub

Navigate to Settings > AI > Plugins in DataHub
Click + Create and select Custom MCP
Fill in the plugin details:

Field	Value
Name	`Glean`
Description	A description for the plugin
MCP Server URL	Your Glean MCP server URL
Authentication Type	`User OAuth (Each user authenticates)`

DataHub will automatically discover the OAuth configuration from Glean and register a client — no manual OAuth setup is required. This includes:
- Authorization and token endpoints
- Available scopes
- Client registration
Review the discovered scopes. All scopes are selected by default. Ensure the mcp scope is selected — this is required for the plugin to function.

:::warning Required Scope The mcp scope must be selected for the Glean plugin to work. Without it, the MCP server will return a 401 Unauthorized error when Ask DataHub tries to use the plugin. If you see this error after setup, edit the plugin and verify that the mcp scope is enabled. :::

Optionally add Instructions for the AI Assistant, ensure Enable for Ask DataHub is on, and click Create

User Setup

Navigate to Settings > My AI Settings, find the Glean plugin, and click Connect. You'll be redirected to Glean to authenticate, then back to DataHub. See the overview for more details.

Usage Tips

Glean plugin complements DataHub's Context Documents — use Context Documents for curated, governable knowledge and Glean for broader organizational search
The AI will automatically decide when to use Glean vs. DataHub's built-in search based on the question
Be specific in your prompts about what kind of documentation you're looking for

Troubleshooting

401 Unauthorized Error

If you see OAuth succeeded but MCP server returned 401: Client error '401 Unauthorized', the mcp scope is not selected for the plugin. Edit the plugin in Settings > AI > Plugins, ensure the mcp scope is enabled, and save.

OAuth Discovery Fails

Verify the Glean MCP server URL is correct and accessible
Ensure your Glean instance supports OAuth discovery and dynamic client registration
Contact your Glean administrator to verify MCP server access is enabled

No Results

Verify that Glean has indexed the content sources you expect
Try broader search terms
Check that the authenticated user has access to the relevant content in Glean