Kanishka Shrivastava This workflow corresponds to n8n.io template #16094 — we link there as the canonical source.
This workflow follows the Agent → OpenRouter Chat 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 →
{
"id": "FUpZPZE9KCnvVEti",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "Tutor English messages from webhook using OpenRouter and Postgres memory",
"tags": [],
"nodes": [
{
"id": "bfa8e352-a943-4198-9cf5-2997a603a9a0",
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"position": [
-80,
0
],
"parameters": {
"path": "e5626949-1022-4883-a045-3d118685694d",
"options": {},
"httpMethod": "POST",
"responseMode": "responseNode"
},
"typeVersion": 2.1
},
{
"id": "77cfcd9c-d5cb-4147-a517-1c5fce89749d",
"name": "Respond to Webhook",
"type": "n8n-nodes-base.respondToWebhook",
"position": [
1232,
0
],
"parameters": {
"options": {},
"respondWith": "json",
"responseBody": "={\n \"success\": true,\n \"reply\": {{ JSON.stringify($json.message) }}\n}"
},
"typeVersion": 1.5
},
{
"id": "23a20a79-7d83-45a1-b081-0e0fb09a5f8e",
"name": "Edit Fields",
"type": "n8n-nodes-base.set",
"position": [
240,
0
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "3d9a3593-0bae-45c7-a9e4-261f9aec0e00",
"name": "user_id",
"type": "string",
"value": "={{$json.body.user_id}}"
},
{
"id": "dc3f3d15-a058-4479-a11c-363acf3d24c1",
"name": "message",
"type": "string",
"value": "={{$json.body.message}}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "ec854594-cea9-4e7c-8773-9f94f0de673d",
"name": "AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
496,
0
],
"parameters": {
"text": "={{ $json.message }}",
"options": {
"systemMessage": "You are an advanced AI English tutor.\n\nRules:\n- remember previous conversations\n- help improve grammar\n- encourage confidence\n- explain mistakes simply\n- sound warm and natural"
},
"promptType": "define"
},
"typeVersion": 3.1
},
{
"id": "1edfd4e2-5af4-4f9f-a03f-daf234fab7a9",
"name": "OpenRouter Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter",
"position": [
384,
240
],
"parameters": {
"model": "poolside/laguna-m.1:free",
"options": {}
},
"credentials": {
"openRouterApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
},
{
"id": "3b424b31-876b-49ae-b424-3ace1979acab",
"name": "Postgres Chat Memory",
"type": "@n8n/n8n-nodes-langchain.memoryPostgresChat",
"position": [
752,
240
],
"parameters": {
"sessionKey": "={{ $json.user_id }}",
"sessionIdType": "customKey"
},
"credentials": {
"postgres": {
"name": "<your credential>"
}
},
"typeVersion": 1.3
},
{
"id": "51ae8112-8b54-4061-8273-7e934513a937",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
-528,
-304
],
"parameters": {
"width": 352,
"height": 464,
"content": "## \ud83c\udf93 AI English Tutor\n\nThis workflow creates a conversational AI English tutor that remembers \neach student's history across sessions.\n\n**How to use:**\nPOST to /webhook/ai-tutor with:\n{\n \"user_id\": \"student_123\",\n \"message\": \"I goed to the market yesterday.\"\n}\n\n**What you need:**\n- OpenRouter API key (free tier works)\n- PostgreSQL database (for memory)\n- Supabase project with a `conversations` table\n (columns: user_id, role, message)\n\n**To customize:**\n- Change the model in the OpenRouter node\n- Edit the system prompt in the AI Agent node\n- Swap Supabase for any other database node"
},
"typeVersion": 1
},
{
"id": "63696c52-4333-42dd-ba02-e5ed59594f07",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-112,
-256
],
"parameters": {
"color": 6,
"width": 224,
"height": 240,
"content": "## 1. Webhook\nListens for POST requests at /webhook/ai-tutor.\n\nExpected body:\n{\n \"user_id\": \"string\",\n \"message\": \"string\"\n}\n\nThe user_id is used to track memory per student."
},
"typeVersion": 1
},
{
"id": "71fbef4d-dfa0-4b8b-af90-8426cac75ecc",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
176,
-256
],
"parameters": {
"color": 6,
"width": 224,
"height": 240,
"content": "## 2. Edit Fields\nExtracts user_id and message from the webhook body \nand passes them cleanly to the AI Agent.\n\n\u2699\ufe0f If you rename your input fields, update the \nexpressions here to match."
},
"typeVersion": 1
},
{
"id": "0a57812b-0f47-45f6-9911-d77dd80d02c8",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
464,
-368
],
"parameters": {
"color": 6,
"width": 304,
"height": 352,
"content": "## 3. AI Agent\nThe core of the tutor. Sends the student's message \nto the LLM with a tutor system prompt.\n\nThe agent:\n- Corrects grammar with simple explanations\n- Remembers past conversations (via Postgres Memory)\n- Responds with encouragement and warmth\n\n\u270f\ufe0f Edit the system prompt here to change the \ntutor's subject, tone, or rules."
},
"typeVersion": 1
},
{
"id": "24715753-6430-4c7a-ac6f-523b9b75b7f4",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
224,
384
],
"parameters": {
"color": 6,
"width": 336,
"height": 272,
"content": "## 3a. OpenRouter Chat Model\nConnects the AI Agent to an LLM via OpenRouter.\n\nDefault model: poolside/laguna-m.1:free\n\n\u270f\ufe0f Swap the model slug to use GPT-4o, Claude, \nGemini, or any other OpenRouter-supported model.\n\n\ud83d\udd11 Add your OpenRouter API key in the credentials."
},
"typeVersion": 1
},
{
"id": "c450eefa-3176-49af-9c0d-3a3724f3c997",
"name": "Sticky Note5",
"type": "n8n-nodes-base.stickyNote",
"position": [
640,
384
],
"parameters": {
"color": 6,
"width": 336,
"height": 272,
"content": "## 3b. Postgres Chat Memory\nStores conversation history per student in Postgres.\n\nMemory is keyed by user_id, so each student gets \ntheir own persistent session \u2014 even across days.\n\n\ud83d\udd11 Add your Postgres credentials.\nMake sure the database is accessible from your \nn8n instance."
},
"typeVersion": 1
},
{
"id": "cd54a075-2640-4792-9847-9defd3b9c0df",
"name": "Sticky Note6",
"type": "n8n-nodes-base.stickyNote",
"position": [
816,
-368
],
"parameters": {
"color": 6,
"width": 272,
"height": 352,
"content": "## 4. Supabase \n Log Conversation\nSaves each AI reply to the `conversations` table \nin Supabase for record-keeping and analytics.\n\nRequired table columns:\n- user_id (text)\n- role (text)\n- message (text)\n\n\ud83d\udd11 Add your Supabase credentials.\n\u270f\ufe0f Swap this node for Airtable, Google Sheets, \nor any other DB if you prefer."
},
"typeVersion": 1
},
{
"id": "713efb6f-2362-41d0-9536-25cd4fc2db54",
"name": "Sticky Note7",
"type": "n8n-nodes-base.stickyNote",
"position": [
1136,
-336
],
"parameters": {
"color": 6,
"width": 304,
"height": 320,
"content": "## 5. Respond to Webhook\nReturns the tutor's reply as a JSON response \nto the original caller.\n\nResponse format:\n{\n \"success\": true,\n \"reply\": \"Tutor's message here\"\n}\n\n\u270f\ufe0f Edit the response body here if your frontend \nexpects a different format."
},
"typeVersion": 1
},
{
"id": "448faf08-0be8-463b-9d0e-df9d9026add8",
"name": "Log to Supabase",
"type": "n8n-nodes-base.supabase",
"position": [
912,
0
],
"parameters": {
"tableId": "conversations",
"fieldsUi": {
"fieldValues": [
{
"fieldId": "user_id",
"fieldValue": "={{ $('Webhook').item.json.body.user_id }}"
},
{
"fieldId": "role",
"fieldValue": "={{ $('Webhook').item.json.body.message }}"
},
{
"fieldId": "message",
"fieldValue": "={{ $json.output }}"
}
]
}
},
"credentials": {
"supabaseApi": {
"name": "<your credential>"
}
},
"typeVersion": 1
}
],
"active": true,
"settings": {
"binaryMode": "separate",
"callerPolicy": "workflowsFromSameOwner",
"timeSavedMode": "fixed",
"availableInMCP": false,
"executionOrder": "v1"
},
"versionId": "a6e49e32-9b41-4beb-9221-9ec350fe92d7",
"connections": {
"Webhook": {
"main": [
[
{
"node": "Edit Fields",
"type": "main",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[
{
"node": "Log to Supabase",
"type": "main",
"index": 0
}
]
]
},
"Edit Fields": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Log to Supabase": {
"main": [
[
{
"node": "Respond to Webhook",
"type": "main",
"index": 0
}
]
]
},
"Postgres Chat Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"OpenRouter Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
}
}
}
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.
openRouterApipostgressupabaseApi
Pro
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About this workflow
This workflow receives English practice messages via a webhook, uses an OpenRouter chat model with Postgres-backed conversation memory to generate tutoring feedback, logs the exchange to Supabase, and returns the tutor’s reply as a JSON response. Receives a POST webhook request…
Source: https://n8n.io/workflows/16094/ — original creator credit. Request a take-down →
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