> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/integrations/builtin/cluster-nodes/sub-nodes/n8n-nodes-langchain.outputparserstructured.md).

# Use Structured Output Parser in Duaer

Structured Output Parser in Duaer is an AI or cluster node, often used with model, tool, or vector-store sub-nodes. Node note: Return data in a defined JSON format
## Structured Output Parser in Duaer

Structured Output Parser is used in Duaer’s AI or cluster features, often wired with chat-model, tool, or vector-store sub-nodes.

The product’s node note is: Return data in a defined JSON format.

## Credentials and parameters

Create the credential type this service needs under Credentials.

Parameters accept expressions. Tool parameters that an AI Agent should fill use $fromAI. When a run fails, read the error on the node output first.
## Questions

### How do you add Structured Output Parser to a Duaer digital organization?

Open the node panel on the Duaer canvas, search for Structured Output Parser, and drop it onto the digital organization. Connect it after a trigger or a previous node. If auth is required, save the credential first and select it on the node.

### What should you check first when Structured Output Parser fails in Duaer?

Read the error text on that node’s output, then confirm the credential still works and required parameters are filled. For app nodes, also check permissions and quota on the provider side.