Automation library · Content

Conversational PostgreSQL agent with Claude

Started by someone opening a chat with it, and works across Postgres. It puts Claude behind a retrieval step, so answers are drawn from documents you supply rather than from the model alone. 19 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: ClaudeRetrieval

19 stepsMedium: a working afternoon
1Branch: places the flow splits
0Loops or waits
1Service it connects to

The flow

Starts it 3Model 10Logic 1Service 5

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

  1. 1GetTableSchemaPostgres ToolService
  2. 2ListTablesPostgres ToolService
  3. 3When Executed by Another WorkflowExecute Workflow triggerStarts it
  4. 4CreateTableRecordsTool WorkflowModel
  5. 5UpdateTableRecordsTool WorkflowModel
  6. 6MCP ClientMcp Client ToolModel
  7. 7Anthropic Chat ModelLm Chat AnthropicModel
  8. 8ThinkTool ThinkModel
  9. 9get table detailsTool WorkflowModel
  10. 10ReadTableRowsTool WorkflowModel
  11. 11Plot toolTool WorkflowModel
  12. 12Simple MemoryMemory Buffer WindowModel
  13. 13When chat message receivedChat triggerStarts it
  14. 14PostgreSQL MCP ServerMcp triggerStarts it
  15. 15OperationSwitchLogic
  16. 16AI AgentAgentModel
  17. 17ReadTableRecordPostgresService
  18. 18CreateTableRecordPostgresService
  19. 19UpdateTableRecordPostgresService

How it's built

Starts on
Someone opening a chat with it
Steps
19, with 1 branch
Size
Medium: a working afternoon
Connects to
Postgres
Model
Claude
Retrieval
Answers are drawn from documents you supply, not from the model alone

Questions

What does it need to run?

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

What starts it?

It starts on someone opening a chat with it.

Does it use AI?

Yes. It calls Claude. Its answers draw on documents you give it, not on the model alone. Model calls are billed by the provider, not by n8n.

How long does it take to set up?

Plan an afternoon. 19 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 19 steps before you point it at anything that matters.