n8n Subworkflow Dependency Graph & Auto-Tagging

Complex

High

Nodes

Complex

Trigger

High

Complexity

7/22/2025

Added

Workflow Overview

Total Nodes

Node Types

http Request

Update workflow tags, GET all tags, Create new tags, GET all tags again

4 nodes

n8n

GET all workflows, GET workflow(s)

2 nodes

code

List callers of subworkflows, Return original pass through values, Format workflow relationship data for rendering

3 nodes

filter

Exclude uncalled workflows, Exclude missing workflows

2 nodes

schedule Trigger

And every Sunday

1 node

n8n Trigger

When this workflow is activated

1 node

set

Count callers and identify new callers, Remove existing tags from new_callers list, Create tag id:name dictionary, Retrieve tag ids and names from dictionary, Return dependency graph data, SET instance_url

6 nodes

split In Batches

Loop through workflows

1 node

If any new callers

1 node

split Out

Split out new callers as new tags

1 node

merge

Merge

1 node

aggregate

Combine dependency graph values into labels

1 node

quick Chart

Visualize subworkflow dependency graph

1 node

sticky Note

Sticky Note, Sticky Note1, Sticky Note2, Sticky Note3, Sticky Note4, Sticky Note7, Sticky Note5, Sticky Note6, Sticky Note8, Sticky Note9, Sticky Note10, Sticky Note11, Sticky Note12

13 nodes

webhook

When viewed in a browser

1 node

respond To Webhook

Visualize dependency graph with MermaidJS

1 node

Workflow JSON

35.91 KB

{
  "id": "P9Jr9s9yfcDXTe9R",
  "meta": {
    "instanceId": "a9f3b18652ddc96459b459de4fa8fa33252fb820a9e5a1593074f3580352864a",
    "templateCredsSetupCompleted": true
  },
  "name": "n8n Subworkflow Dependency Graph & Auto-Tagging",
  "tags": [],
  "nodes": [
    {
      "id": "c3e6b9cb-4681-4778-b2f4-01c4a7d8c844",
      "name": "Update workflow tags",
      "type": "n8n-nodes-base.httpRequest",
      "position": [
        3200,
        740
      ],
      "parameters": {
        "url": "={{ $('SET instance_url').item.json.instance_url }}/api/v1/workflows/{{ $json.id }}/tags",
        "method": "PUT",
        "options": {},
        "jsonBody": "={{ $json.tags }}",
        "sendBody": true,
        "specifyBody": "json",
        "authentication": "predefinedCredentialType",
        "nodeCredentialType": "n8nApi"
      },
      "credentials": {
        "n8nApi": {
          "id": "XXXXXX",
          "name": "n8n account"
        }
      },
      "typeVersion": 4.2
    },
    {
      "id...

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