This workflow follows the Agent → Chat Trigger recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "V2 Supabase RAG AI Agent",
"nodes": [
{
"parameters": {},
"id": "3e70b57d-49fb-4cb0-8f9f-29d39adf6a65",
"name": "Postgres Chat Memory",
"type": "@n8n/n8n-nodes-langchain.memoryPostgresChat",
"typeVersion": 1.1,
"position": [
480,
340
],
"credentials": {
"postgres": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"model": "qwen2.5:7b-instruct-q4_K_M",
"options": {}
},
"id": "8d61de27-45d8-4d10-97cc-3c36d224f865",
"name": "Ollama Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOllama",
"typeVersion": 1,
"position": [
360,
340
],
"credentials": {
"ollamaApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"model": "qwen2.5:7b-instruct-q4_K_M",
"options": {}
},
"id": "cbd5b56f-7afc-4e83-a221-6be4d348374e",
"name": "Ollama Model",
"type": "@n8n/n8n-nodes-langchain.lmOllama",
"typeVersion": 1,
"position": [
1400,
280
],
"credentials": {
"ollamaApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"name": "documents",
"topK": 3
},
"id": "c15bd0a8-286a-4076-8ce8-8c0e54f73e2a",
"name": "Vector Store Tool",
"type": "@n8n/n8n-nodes-langchain.toolVectorStore",
"typeVersion": 1,
"position": [
1180,
100
]
},
{
"parameters": {
"operation": "text",
"destinationKey": "=data",
"options": {}
},
"id": "ab9fb44a-85c6-486b-b5de-0f9d768d91b2",
"name": "Extract Document Text",
"type": "n8n-nodes-base.extractFromFile",
"typeVersion": 1,
"position": [
920,
640
],
"alwaysOutputData": true
},
{
"parameters": {
"options": {
"metadata": {
"metadataValues": [
{
"name": "file_id",
"value": "={{ $('Local File Trigger').item.json.path }}"
}
]
}
}
},
"id": "b5abf0a5-f62a-49a6-bf81-bf002ba4bb90",
"name": "Default Data Loader",
"type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader",
"typeVersion": 1,
"position": [
1300,
880
]
},
{
"parameters": {
"chunkSize": 100,
"options": {}
},
"id": "1e2791c1-86e7-4fe1-a76d-732f87e6f41a",
"name": "Recursive Character Text Splitter",
"type": "@n8n/n8n-nodes-langchain.textSplitterRecursiveCharacterTextSplitter",
"typeVersion": 1,
"position": [
1300,
1100
]
},
{
"parameters": {
"model": "nomic-embed-text:latest"
},
"id": "909713ea-5be3-4916-b12e-a8e848c949cb",
"name": "Embeddings Ollama1",
"type": "@n8n/n8n-nodes-langchain.embeddingsOllama",
"typeVersion": 1,
"position": [
1140,
880
],
"credentials": {
"ollamaApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"content": "## Local RAG AI Agent with Chat Interface",
"height": 527.3027193303974,
"width": 969.0343804425795
},
"id": "de473f2f-b806-45bc-a0e0-2ef0d2aa9b55",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
0,
0
]
},
{
"parameters": {
"content": "## Agent Tools for Local RAG",
"height": 528.85546469693,
"width": 583.4552380860637,
"color": 4
},
"id": "b23ef570-f642-4503-87b9-3494ffdbf768",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
980,
0
]
},
{
"parameters": {
"content": "## Workflow to Create Local Knowledgebase",
"height": 705.2695614889159,
"width": 1568.9362829025763,
"color": 5
},
"id": "836cd765-dae8-460e-951d-66e19d0cce77",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
0,
540
]
},
{
"parameters": {
"options": {}
},
"id": "f8b5039c-4b00-453a-b30e-31a59f5d36ad",
"name": "When chat message received",
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"typeVersion": 1.1,
"position": [
60,
120
]
},
{
"parameters": {
"options": {}
},
"id": "2f64907b-42ef-4bd6-83ba-e97584271bc7",
"name": "Respond to Webhook",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.1,
"position": [
780,
120
]
},
{
"parameters": {
"httpMethod": "POST",
"path": "invoke_n8n_agent",
"responseMode": "responseNode",
"options": {}
},
"id": "9a30041f-0c14-41d8-a811-229b890bb1b7",
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
60,
300
]
},
{
"parameters": {
"options": {}
},
"id": "8311e22f-bddd-41f8-9d40-fde119126dc9",
"name": "AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 1.6,
"position": [
440,
120
]
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "75ebfdef-c8e2-4c3e-b716-1479d0cc2a73",
"name": "chatInput",
"value": "={{ $json?.chatInput || $json.body.chatInput }}",
"type": "string"
},
{
"id": "59b7a20f-0626-4861-93e2-015d430c266e",
"name": "sessionId",
"value": "={{ $json?.sessionId || $json.body.sessionId}}",
"type": "string"
}
]
},
"options": {}
},
"id": "4988a14f-a2ea-4c4b-8f66-0f1773e11ea0",
"name": "Edit Fields",
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
260,
120
]
},
{
"parameters": {
"tableName": {
"__rl": true,
"value": "documents",
"mode": "list",
"cachedResultName": "documents"
},
"options": {
"queryName": "match_documents"
}
},
"type": "@n8n/n8n-nodes-langchain.vectorStoreSupabase",
"typeVersion": 1,
"position": [
1000,
240
],
"id": "9841944a-5a85-437d-a9ed-a3e7393d7a8d",
"name": "Supabase Vector Store",
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"model": "nomic-embed-text:latest"
},
"type": "@n8n/n8n-nodes-langchain.embeddingsOllama",
"typeVersion": 1,
"position": [
1180,
380
],
"id": "24e6e703-33c2-426d-ab59-7c9cad0fded9",
"name": "Embeddings Ollama2",
"credentials": {
"ollamaApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"mode": "insert",
"tableName": {
"__rl": true,
"value": "documents",
"mode": "list",
"cachedResultName": "documents"
},
"options": {
"queryName": "match_documents"
}
},
"type": "@n8n/n8n-nodes-langchain.vectorStoreSupabase",
"typeVersion": 1,
"position": [
1180,
640
],
"id": "d72c6f38-7766-4a10-9897-362539a6bcc0",
"name": "Supabase Vector Store1",
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"operation": "delete",
"tableId": "documents",
"filterType": "string",
"filterString": "=metadata->>file_id=like.*{{ $json.path }}*"
},
"id": "ab0e0395-9f88-438f-bc47-ea3913b869fe",
"name": "Delete Old Doc Rows",
"type": "n8n-nodes-base.supabase",
"typeVersion": 1,
"position": [
460,
840
],
"alwaysOutputData": true,
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"triggerOn": "folder",
"path": "/data/shared",
"events": [
"add",
"change"
],
"options": {
"followSymlinks": true,
"usePolling": true
}
},
"type": "n8n-nodes-base.localFileTrigger",
"typeVersion": 1,
"position": [
60,
840
],
"id": "eba68fe1-738d-451b-a2a7-9ee2942dd727",
"name": "Local File Trigger"
},
{
"parameters": {
"fileSelector": "={{ $('Local File Trigger').item.json.path }}",
"options": {
"dataPropertyName": "=data"
}
},
"type": "n8n-nodes-base.readWriteFile",
"typeVersion": 1,
"position": [
640,
640
],
"id": "b9459d4d-836c-47c4-9651-ebf3129f8864",
"name": "Read/Write Files from Disk",
"executeOnce": true
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "e051736f-949a-4230-bf32-c9ade2674b12",
"leftValue": "={{ $json.event }}",
"rightValue": "add",
"operator": {
"type": "string",
"operation": "equals",
"name": "filter.operator.equals"
}
}
],
"combinator": "and"
},
"options": {}
},
"type": "n8n-nodes-base.if",
"typeVersion": 2.2,
"position": [
280,
660
],
"id": "27123d6a-e27a-49a9-bd73-8a27235928ea",
"name": "If"
}
],
"connections": {
"Postgres Chat Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"Ollama Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Ollama Model": {
"ai_languageModel": [
[
{
"node": "Vector Store Tool",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Extract Document Text": {
"main": [
[
{
"node": "Supabase Vector Store1",
"type": "main",
"index": 0
}
]
]
},
"Default Data Loader": {
"ai_document": [
[
{
"node": "Supabase Vector Store1",
"type": "ai_document",
"index": 0
}
]
]
},
"Recursive Character Text Splitter": {
"ai_textSplitter": [
[
{
"node": "Default Data Loader",
"type": "ai_textSplitter",
"index": 0
}
]
]
},
"Embeddings Ollama1": {
"ai_embedding": [
[
{
"node": "Supabase Vector Store1",
"type": "ai_embedding",
"index": 0
}
]
]
},
"When chat message received": {
"main": [
[
{
"node": "Edit Fields",
"type": "main",
"index": 0
}
]
]
},
"Webhook": {
"main": [
[
{
"node": "Edit Fields",
"type": "main",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[
{
"node": "Respond to Webhook",
"type": "main",
"index": 0
}
]
]
},
"Edit Fields": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Vector Store Tool": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Supabase Vector Store": {
"ai_vectorStore": [
[
{
"node": "Vector Store Tool",
"type": "ai_vectorStore",
"index": 0
}
]
]
},
"Embeddings Ollama2": {
"ai_embedding": [
[
{
"node": "Supabase Vector Store",
"type": "ai_embedding",
"index": 0
}
]
]
},
"Delete Old Doc Rows": {
"main": [
[
{
"node": "Read/Write Files from Disk",
"type": "main",
"index": 0
}
]
]
},
"Local File Trigger": {
"main": [
[
{
"node": "If",
"type": "main",
"index": 0
}
]
]
},
"Read/Write Files from Disk": {
"main": [
[
{
"node": "Extract Document Text",
"type": "main",
"index": 0
}
]
]
},
"If": {
"main": [
[
{
"node": "Read/Write Files from Disk",
"type": "main",
"index": 0
}
],
[
{
"node": "Delete Old Doc Rows",
"type": "main",
"index": 0
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "ea9ff68c-8fc0-40b0-aa5d-48217cda89f3",
"id": "hrnPh6dXgIbGVzIk",
"tags": []
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
ollamaApipostgressupabaseApi
Pro
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About this workflow
V2 Supabase RAG AI Agent. Uses memoryPostgresChat, lmChatOllama, lmOllama, toolVectorStore. Chat trigger; 23 nodes.
Source: https://github.com/161sam/Workspace-in-a-Box/blob/main/n8n/backup/workflows/V2_Local_Supabase_RAG_AI_Agent.json — original creator credit. Request a take-down →
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