Integrate Dify with Live BigQuery Data via CData Connect AI
Dify is an open source platform for building production-ready agentic workflows, chatbots, and other LLM applications. It includes built-in, two-way support for the model context protocol (MCP), allowing you to register remote MCP servers as tools in the platform to add external data sources and give your agents access to live data.
By integrating Dify with CData Connect AI through the built-in MCP Server, Dify gains governed, real-time access to live BigQuery data. You can list catalogs, explore schemas, and query records from BigQuery data using natural language prompts, with all data access running securely against authorized sources.
This article explains how to configure BigQuery connectivity in Connect AI, generate the required personal access token, register the Connect AI MCP Server as a tool in Dify, add it to an agent application, and verify the integration by querying live BigQuery data from Dify.
About BigQuery Data Integration
CData simplifies access and integration of live Google BigQuery data. Our customers leverage CData connectivity to:
- Simplify access to BigQuery with broad out-of-the-box support for authentication schemes, including OAuth, OAuth JWT, and GCP Instance.
- Enhance data workflows with Bi-directional data access between BigQuery and other applications.
- Perform key BigQuery actions like starting, retrieving, and canceling jobs; deleting tables; or insert job loads through SQL stored procedures.
Most CData customers are using Google BigQuery as their data warehouse and so use CData solutions to migrate business data from separate sources into BigQuery for comprehensive analytics. Other customers use our connectivity to analyze and report on their Google BigQuery data, with many customers using both solutions.
For more details on how CData enhances your Google BigQuery experience, check out our blog post: https://www.cdata.com/blog/what-is-bigquery
Getting Started
Step 1: Configure BigQuery connectivity for Dify
Connectivity to BigQuery from Dify is made possible through Connect AI's Remote MCP Server. To interact with BigQuery data from Dify, start by creating and configuring a BigQuery connection in Connect AI.
- Log into Connect AI, click Sources, and then click Add Connection
- Select BigQuery from the Add Connection panel
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BigQuery uses OAuth to authenticate. Click Sign in to authenticate with BigQuery
- Navigate to the Permissions tab and update user-based permissions
Add a Personal Access Token
A Personal Access Token (PAT) is used to authenticate the connection to Connect AI from Dify. It is best practice to create a separate PAT for each integration to maintain granular access control.
- Click the gear icon () at the top right of the Connect AI app to open Settings
- On the Settings page, go to the Access Tokens section and click Create PAT
- Give the PAT a descriptive name and click Create
- Copy the token when displayed and store it securely. It will not be shown again
With the BigQuery connection configured and a PAT generated, Dify can now connect to BigQuery data through Connect AI.
Step 2: Register the Connect AI MCP Server in Dify
Next, register the Connect AI Remote MCP Server as a tool in Dify so your agents and workflows can discover and call live data tools through Connect AI.
- Log into Dify, or open your self-hosted Dify instance (version 1.6.0 or later, which includes built-in MCP support)
- Navigate to the Integrations page, select Tools and click MCP tab
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Click Add MCP Server (HTTP) and enter the following details:
- Server URL: https://mcp.cloud.cdata.com/mcp
- Name Icon: Give a descriptive name, for example, CData Connect AI
- Server Identifier: A unique identifier, for example, cdata-connect-ai
- Headers: Add an Authorization header with the value Basic your_base64_encoded_email_PAT
Note: Dify will use Basic authentication with Connect AI. Combine your Connect AI user email and the PAT you created earlier in the format email:PAT, base64 encode the combined string, and prefix it with Basic.
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Click Add & Authorize. Dify connects to the Connect AI MCP Server and lists the available tools
With the MCP server registered, the Connect AI tools are available to any agent application or workflow in your Dify workspace.
Step 3: Query live BigQuery data from Dify
With the integration complete, build an agent application in Dify and interact with live BigQuery data through natural language prompts.
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From the Dify Studio page, click Create from Blank and select Agent as the application type
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In the agent configuration, click Add under the Tools section and select the Connect AI MCP tools registered in Step 2
- Select an LLM provider and model for the agent so it can interpret prompts and call MCP tools
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In the preview panel, type a prompt in the chat input, for example:
- Use the cdata-connect-ai tools to list all available catalogs
- Show the available schemas and tables for BigQuery
- Query the top 5 records from a table in BigQuery
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The Dify agent calls the Connect AI MCP Server and returns live results from BigQuery data
At this point, Dify communicates with the Connect AI MCP Server and retrieves live BigQuery data through remote MCP tools directly from your agentic workflows.
Get started with CData Connect AI
To access hundreds of SaaS, big data, and NoSQL sources directly from your cloud applications, try CData Connect AI today. Download a free 14-day trial of CData Connect AI, and our Support Team is available to help with any questions you have.