LangChain Workflow Retriever: Q&A on Workflow Data with OpenAI
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This n8n workflow demonstrates how to use the LangChain Retriever node to query data generated by another workflow. It leverages an OpenAI Chat Model for question answering, providing a powerful way to interact with your automated processes.
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About This Workflow
Overview
This n8n workflow utilizes the power of LangChain to create a question-answering system over data previously generated and saved by another n8n workflow. The core logic involves fetching relevant information using the Workflow Retriever node, which is then processed by a Retrieval QA Chain node, powered by an OpenAI Chat Model. This approach solves the problem of needing to extract specific, actionable insights from the outputs of complex or long-running n8n workflows without manually sifting through data.
Key Features
- Dynamically retrieve data from a specified n8n workflow using its ID.
- Employ LangChain's
Retrieval QA Chainfor sophisticated question answering. - Integrate with
OpenAI Chat Modelfor natural language understanding and response generation. - Enables interactive querying of historical workflow data.
How To Use
- Ensure you have the LangChain nodes installed in n8n.
- Configure the
OpenAI Chat Modelnode with your OpenAI API credentials. - In the
Workflow Retrievernode, replace the placeholderworkflowIdwith the actual ID of the n8n workflow whose data you want to query. - In the
Example Promptnode, define the question you want to ask about the data. - Connect the nodes as shown in the workflow diagram:
When clicking "Execute Workflow"->Example Prompt->Retrieval QA Chain2. - Connect the
OpenAI Chat ModelandWorkflow Retrievernodes to theRetrieval QA Chain2node. - Execute the workflow to get answers to your questions.
Apps Used
Workflow JSON
{
"id": "2b491a3f-de4f-4256-b96f-deeb1c916bcf",
"name": "LangChain Workflow Retriever: Q&A on Workflow Data with OpenAI",
"nodes": 0,
"category": "OpenAI and LLMs",
"status": "active",
"version": "1.0.0"
}Note: This is a sample preview. The full workflow JSON contains node configurations, credentials placeholders, and execution logic.
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ID: 2b491a3f-de4f...
About the Author
Crypto_Watcher
Web3 Developer
Automated trading bots and blockchain monitoring workflows.
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