Automation library · Content

PostgreSQL conversational 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. 18 steps, 1 branch: a working afternoon to understand properly.

MediumCalls a model: ClaudeRetrieval

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

The flow

Starts it 3Model 9Logic 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. 6When chat message receivedChat triggerStarts it
  7. 7Simple MemoryMemory Buffer WindowModel
  8. 8MCP ClientMcp Client ToolModel
  9. 9Anthropic Chat ModelLm Chat AnthropicModel
  10. 10ThinkTool ThinkModel
  11. 11get table detailsTool WorkflowModel
  12. 12ReadTableRowsTool WorkflowModel
  13. 13PostgreSQL MCP ServerMcp triggerStarts it
  14. 14OperationSwitchLogic
  15. 15AI AgentAgentModel
  16. 16ReadTableRecordPostgresService
  17. 17CreateTableRecordPostgresService
  18. 18UpdateTableRecordPostgresService

How it's built

Starts on
Someone opening a chat with it
Steps
18, 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. 18 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 18 steps before you point it at anything that matters.