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 →
{
"nodes": [
{
"parameters": {
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"typeVersion": 1.4,
"position": [
912,
1168
],
"id": "9d0ba527-cb5e-4a44-a6b3-c09fca3aba3d",
"name": "When chat message received"
},
{
"parameters": {
"promptType": "define",
"text": "={{ $json.chatInput }}",
"options": {
"systemMessage": "You are a helpful AI assistant with access to a knowledge base. Use the document retrieval tool to find relevant information from uploaded documents to answer user questions accurately. Always cite information from the retrieved documents when available."
}
},
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 3.1,
"position": [
1200,
960
],
"id": "1b303e56-784c-4601-8618-87fc4159c240",
"name": "AI Agent"
},
{
"parameters": {
"model": {
"__rl": true,
"value": "gpt-4o-mini",
"mode": "list",
"cachedResultName": "gpt-4o-mini"
},
"builtInTools": {},
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"typeVersion": 1.3,
"position": [
1136,
1184
],
"id": "da4c33ab-fba1-49d6-b0ac-526adccb0ab2",
"name": "OpenAI Chat Model",
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {},
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"typeVersion": 1.3,
"position": [
1264,
1184
],
"id": "fabc1852-49e8-48f4-bb2f-e482bc2be6c1",
"name": "Simple Memory"
},
{
"parameters": {
"chunkOverlap": 200,
"options": {}
},
"id": "98f79cf2-b1c8-4f42-8da1-95d97c866e35",
"name": "Chunk Text",
"type": "@n8n/n8n-nodes-langchain.textSplitterRecursiveCharacterTextSplitter",
"typeVersion": 1,
"position": [
1200,
2032
]
},
{
"parameters": {
"options": {}
},
"id": "9baf4ab7-aef2-4162-9ebd-1b2fbb8277da",
"name": "OpenAI Embeddings",
"type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi",
"typeVersion": 1.1,
"position": [
992,
1840
],
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"mode": "insert",
"tableName": {
"__rl": true,
"mode": "id",
"value": "documents"
},
"options": {
"queryName": "match_documents"
}
},
"id": "f4478a93-662f-4383-b392-dc679545300c",
"name": "Store in Supabase",
"type": "@n8n/n8n-nodes-langchain.vectorStoreSupabase",
"typeVersion": 1,
"position": [
1040,
1584
],
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"mode": "retrieve-as-tool",
"toolName": "document_search",
"toolDescription": "Search the knowledge base for relevant information from uploaded documents. Use this tool to find answers to user questions.",
"tableName": {
"__rl": true,
"mode": "id",
"value": "documents"
},
"topK": 5,
"options": {
"queryName": "match_documents",
"metadata": {
"metadataValues": [
{
"name": "user_id",
"value": "={{ $json.user_id }}"
}
]
}
}
},
"id": "fd13a3ce-06c1-4fda-8137-18fa2bab4f0b",
"name": "Retrieve from Supabase",
"type": "@n8n/n8n-nodes-langchain.vectorStoreSupabase",
"typeVersion": 1,
"position": [
1392,
1184
],
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"options": {}
},
"id": "eeefedf3-739c-44bb-acc2-d08afa0bcdd3",
"name": "OpenAI Embeddings for Retrieval",
"type": "@n8n/n8n-nodes-langchain.embeddingsOpenAi",
"typeVersion": 1.1,
"position": [
1472,
1392
],
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"dataType": "binary",
"options": {}
},
"id": "fbfdb66b-01ab-4fee-96f6-3d845a79b22e",
"name": "Load Document",
"type": "@n8n/n8n-nodes-langchain.documentDefaultDataLoader",
"typeVersion": 1,
"position": [
1120,
1840
]
},
{
"parameters": {
"httpMethod": "POST",
"path": "upload-document",
"responseMode": "responseNode",
"options": {}
},
"id": "b64470b3-0d72-48cc-a0b1-32bf9f705ea9",
"name": "Document Upload Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2.1,
"position": [
768,
1616
]
},
{
"parameters": {
"httpMethod": "POST",
"path": "parse-and-ingest",
"responseMode": "responseNode",
"options": {}
},
"id": "77068411-ab29-4ebe-8a4a-19b9f38405f1",
"name": "Parse Questionnaire Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2.1,
"position": [
2048,
1760
]
},
{
"parameters": {
"method": "POST",
"url": "http://localhost:8000/api/parse",
"sendBody": true,
"contentType": "multipart-form-data",
"bodyParameters": {
"parameters": [
{
"parameterType": "formBinaryData",
"name": "questionnaire",
"inputDataFieldName": "={{ $('Parse Questionnaire Webhook').item.binary.questionnaire }}"
},
{
"parameterType": "formBinaryData",
"name": "references",
"inputDataFieldName": "={{ $('Parse Questionnaire Webhook').item.binary.references }}"
},
{
"parameterType": "formData",
"name": "user_id",
"value": "={{ $('Parse Questionnaire Webhook').item.json.body.user_id }}"
}
]
},
"options": {}
},
"id": "a5f69458-6be0-4136-bdd5-d135cbd66b2d",
"name": "Call FastAPI Parse",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.4,
"position": [
2272,
1760
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "={\n \"run_id\": \"{{ $('Call FastAPI Parse').item.json.run_id }}\",\n \"question_count\": {{ $('Call FastAPI Parse').item.json.question_count }},\n \"chunks_created\": {{ $('Call FastAPI Parse').item.json.chunks_created }}\n}",
"options": {}
},
"id": "6e786949-3a32-4879-9893-b3142e224977",
"name": "Return Parse Results",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.5,
"position": [
2496,
1760
]
},
{
"parameters": {
"httpMethod": "POST",
"path": "generate",
"responseMode": "responseNode",
"options": {}
},
"id": "20be0f34-b957-49ec-95b8-9ff6ebda0c77",
"name": "Generate Answers Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2.1,
"position": [
2048,
1536
]
},
{
"parameters": {
"method": "POST",
"url": "http://localhost:8000/api/generate",
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"run_id\": \"{{ $('Generate Answers Webhook').item.json.body.run_id }}\",\n \"user_id\": \"{{ $('Generate Answers Webhook').item.json.body.user_id }}\"\n}",
"options": {}
},
"id": "af071401-f3e3-46d6-8317-b8829e80b661",
"name": "Call FastAPI Generate",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.4,
"position": [
2272,
1536
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "={\n \"status\": \"{{ $('Call FastAPI Generate').item.json.status }}\",\n \"run_id\": \"{{ $('Call FastAPI Generate').item.json.run_id }}\",\n \"summary\": {{ JSON.stringify($('Call FastAPI Generate').item.json.summary) }}\n}",
"options": {}
},
"id": "13ef60a0-af16-4544-968d-a9902d1512f2",
"name": "Return Generation Results",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.5,
"position": [
2496,
1536
]
},
{
"parameters": {
"httpMethod": "POST",
"path": "export",
"responseMode": "responseNode",
"options": {}
},
"id": "10f59839-3000-4192-aa9c-6773bf1ea5d0",
"name": "Export DOCX Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2.1,
"position": [
2048,
1312
]
},
{
"parameters": {
"method": "POST",
"url": "http://localhost:8000/api/export",
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"run_id\": \"{{ $('Export DOCX Webhook').item.json.body.run_id }}\"\n}",
"options": {
"response": {
"response": {
"responseFormat": "file"
}
}
}
},
"id": "8c161518-61fe-40df-9f90-7647c1324236",
"name": "Call FastAPI Export",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.4,
"position": [
2272,
1312
]
},
{
"parameters": {
"respondWith": "binary",
"options": {
"responseHeaders": {
"entries": [
{
"name": "Content-Type",
"value": "application/vnd.openxmlformats-officedocument.wordprocessingml.document"
},
{
"name": "Content-Disposition",
"value": "attachment; filename=\"questionnaire.docx\""
}
]
}
}
},
"id": "9e252198-4aa1-4aef-ba0f-595245da5524",
"name": "Return DOCX File",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.5,
"position": [
2496,
1312
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "={\n \"response\": \"{{ $('AI Agent').item.json.output }}\",\n \"sessionId\": \"{{ $('When chat message received').item.json.sessionId }}\"\n}",
"options": {}
},
"id": "aab7631c-03cf-4993-9593-2028c278a1c6",
"name": "Return Chat Response",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.5,
"position": [
2048,
2208
]
},
{
"parameters": {
"respondWith": "json",
"responseBody": "{\n \"status\": \"success\",\n \"message\": \"Document uploaded and indexed successfully\"\n}",
"options": {}
},
"id": "abb76596-de69-4374-8e4c-3211c583ceab",
"name": "Return Upload Confirmation",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.5,
"position": [
2048,
1984
]
}
],
"connections": {
"When chat message received": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[
{
"node": "Return Chat Response",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Simple Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"Chunk Text": {
"ai_textSplitter": [
[
{
"node": "Load Document",
"type": "ai_textSplitter",
"index": 0
}
]
]
},
"OpenAI Embeddings": {
"ai_embedding": [
[
{
"node": "Store in Supabase",
"type": "ai_embedding",
"index": 0
}
]
]
},
"Store in Supabase": {
"main": [
[
{
"node": "Return Upload Confirmation",
"type": "main",
"index": 0
}
]
]
},
"Retrieve from Supabase": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"OpenAI Embeddings for Retrieval": {
"ai_embedding": [
[
{
"node": "Retrieve from Supabase",
"type": "ai_embedding",
"index": 0
}
]
]
},
"Load Document": {
"ai_document": [
[
{
"node": "Store in Supabase",
"type": "ai_document",
"index": 0
}
]
]
},
"Document Upload Webhook": {
"main": [
[
{
"node": "Store in Supabase",
"type": "main",
"index": 0
}
]
]
},
"Parse Questionnaire Webhook": {
"main": [
[
{
"node": "Call FastAPI Parse",
"type": "main",
"index": 0
}
]
]
},
"Call FastAPI Parse": {
"main": [
[
{
"node": "Return Parse Results",
"type": "main",
"index": 0
}
]
]
},
"Generate Answers Webhook": {
"main": [
[
{
"node": "Call FastAPI Generate",
"type": "main",
"index": 0
}
]
]
},
"Call FastAPI Generate": {
"main": [
[
{
"node": "Return Generation Results",
"type": "main",
"index": 0
}
]
]
},
"Export DOCX Webhook": {
"main": [
[
{
"node": "Call FastAPI Export",
"type": "main",
"index": 0
}
]
]
},
"Call FastAPI Export": {
"main": [
[
{
"node": "Return DOCX File",
"type": "main",
"index": 0
}
]
]
}
},
"meta": {
"templateCredsSetupCompleted": true
}
}
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.
openAiApisupabaseApi
Pro
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About this workflow
N8N Workflow Fixed. Uses chatTrigger, agent, lmChatOpenAi, memoryBufferWindow. Chat trigger; 22 nodes.
Source: https://github.com/01Vishwa/Dchat/blob/55cbbba7bd26ec357374b0054bcdab1e1e68d41b/n8n/n8n_workflow_fixed.json — original creator credit. Request a take-down →
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