Automation library · Content

Normalize and validate CSV data with Anthropic and OpenAI

Started by another system calling it, and works across Google Sheets, Postgres and Slack. It hands the judgement calls to Claude. 15 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: Claude

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15 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
3Services it connects to

The flow

Starts it 1Model 3Logic 7Service 4

The steps in the order they run, from what starts it.

  1. 1CSV Upload WebhookWebhookStarts it
  2. 2Anthropic Chat ModelLm Chat AnthropicModel
  3. 3Structured Output ParserOutput Parser StructuredModel
  4. 4Workflow ConfigurationSetLogic
  5. 5Schema Inference & Header NormalizationAgentModel
  6. 6Check File TypeIfLogic
  7. 7Apply Normalization & Type CoercionCodeLogic
  8. 8Extract CSV DataExtract From FileService
  9. 9Error - Unsupported File TypeSetLogic
  10. 10Validate Data QualityCodeLogic
  11. 11Generate Error ReportSetLogic
  12. 12Prepare Clean CSV OutputSetLogic
  13. 13Log to Google SheetsGoogle SheetsService
  14. 14Insert into PostgresPostgresService
  15. 15Send NotificationSlackService

How it's built

Starts on
Another system calling it
Steps
15, with 1 branch
Size
Medium: a working afternoon
Connects to
Google Sheets, Postgres, Slack
Model
Claude

Questions

What does it need to run?

An n8n account, plus your own Google Sheets, Postgres and Slack accounts, and a key for Claude. You connect your own accounts after importing it; none are included.

What starts it?

It starts on another system calling it.

Does it use AI?

Yes. It calls Claude. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 15 steps is enough that you should read each one before running it.

How do I import it?

Copy the workflow, open a new workflow in n8n and paste. The steps appear on the canvas, ready for your own accounts.

Before you run it

Nothing here has been tested by us. It is somebody's working automation, read and described from its own steps. Treat the connections it wants as a list of accounts it will touch, and read the 15 steps before you point it at anything that matters.