David Roberts This workflow corresponds to n8n.io template #4269 — we link there as the canonical source.
This workflow follows the Agent → OpenAI 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 →
{
"meta": {
"templateCredsSetupCompleted": true
},
"nodes": [
{
"id": "88b3ca67-d7d6-4e6d-9529-d81377315c05",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
180,
-20
],
"parameters": {
"color": 7,
"width": 180,
"height": 260,
"content": "Check whether the category/priority matches the expected one in the dataset"
},
"typeVersion": 1
},
{
"id": "25d9ced2-d91c-486a-bbc9-481258c716e5",
"name": "Sticky Note3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1200,
40
],
"parameters": {
"width": 200,
"height": 500,
"content": "## How it works\nThis template shows how to calculate a workflow evaluation metric: **whether a category matches the expected one**.\n\nThe workflow takes support tickets and generates a category and priority, which is then compared with the correct answers in the dataset.\n\nYou can find more information on workflow evaluation [here](https://docs.n8n.io/advanced-ai/evaluations/overview), and other metric examples [here](https://docs.n8n.io/advanced-ai/evaluations/metric-based-evaluations/#2-calculate-metrics)."
},
"typeVersion": 1
},
{
"id": "c1f452ac-31e6-4a8c-9558-92ba83a34464",
"name": "Sticky Note4",
"type": "n8n-nodes-base.stickyNote",
"position": [
-960,
280
],
"parameters": {
"color": 7,
"width": 220,
"height": 220,
"content": "Read in [this test dataset](https://docs.google.com/spreadsheets/d/1uuPS5cHtSNZ6HNLOi75A2m8nVWZrdBZ_Ivf58osDAS8/edit?gid=294497137#gid=294497137) of support tickets"
},
"typeVersion": 1
},
{
"id": "79375ec3-713a-4d07-8701-2c8d3392d6c5",
"name": "AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
-420,
200
],
"parameters": {
"text": "=Subject: {{ $json.subject }}\nBody: {{ $json.body }}",
"options": {
"systemMessage": "=You are a support triage assistant.\nGiven the subject and body of a customer support email, return the category and priority based on the following classification:\n\n### Categories:\nBug Report\nFeature Request\nUsage Question\nAccount/Billing\nOutage/Emergency\nIntegration Issue\nFeedback/Compliment\nOther/Uncategorized\n\n### Priorities:\nLow, Medium, High, Urgent\n\nReturn your output as JSON in this format:\n{\n \"category\": \"<category>\",\n \"priority\": \"<priority>\"\n}\n\n### Example \nExample input:\nSubject: OAuth not working with Salesforce node\nBody: I'm trying to connect to Salesforce using OAuth2, but I keep getting a token error. I followed the docs exactly.\n\nExpected output:\n{\n \"category\": \"Integration Issue\",\n \"priority\": \"High\"\n}",
"returnIntermediateSteps": true
},
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 1.9
},
{
"id": "93932809-9b1e-47a2-a50d-0b0978d0b881",
"name": "OpenAI Chat Model",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-440,
420
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "5d8383f2-e0ea-4fd9-bdcb-0f04e1872896",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
-240,
420
],
"parameters": {
"jsonSchemaExample": "{\n \"category\": \"<category>\",\n \"priority\": \"<priority>\"\n}"
},
"typeVersion": 1.2
},
{
"id": "e0d259ea-a9b7-45db-a4fb-fa2a2e5769b3",
"name": "Check categorization",
"type": "n8n-nodes-base.set",
"position": [
220,
80
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "58c48e6f-4a12-4bf6-94ae-705244273a84",
"name": "category_match",
"type": "boolean",
"value": "={{ $json.output.category == $('When fetching a dataset row').item.json.expected_category }}"
},
{
"id": "23959e14-6026-4bd5-b28c-12ab529f21de",
"name": "priority_match",
"type": "boolean",
"value": "={{ $json.output.priority == $('When fetching a dataset row').item.json.expected_priority }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "1ffc9841-a146-4127-a957-69cb73f7e6f8",
"name": "Match webhook format",
"type": "n8n-nodes-base.set",
"position": [
-680,
340
],
"parameters": {
"mode": "raw",
"options": {},
"jsonOutput": "= {\n \"headers\": {\n },\n \"params\": {},\n \"query\": {\n \"subject\": {{ $json.subject.toJsonString() }},\n \"body\": {{ $json.body.toJsonString() }}\n },\n \"body\": {},\n \"executionMode\": \"test\"\n }"
},
"typeVersion": 3.4
},
{
"id": "7505b06e-0179-4e8a-a830-8631be7a9ca9",
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"position": [
-900,
40
],
"parameters": {
"path": "fbe73ea5-bb42-4e3b-9eea-1b6535248eef",
"options": {}
},
"typeVersion": 2
},
{
"id": "5090592c-b883-4644-a8d5-74ada2c4863e",
"name": "When fetching a dataset row",
"type": "n8n-nodes-base.evaluationTrigger",
"position": [
-900,
340
],
"parameters": {
"sheetName": {
"__rl": true,
"mode": "url",
"value": "https://docs.google.com/spreadsheets/d/1uuPS5cHtSNZ6HNLOi75A2m8nVWZrdBZ_Ivf58osDAS8/edit?gid=294497137#gid=294497137"
},
"documentId": {
"__rl": true,
"mode": "url",
"value": "https://docs.google.com/spreadsheets/d/1uuPS5cHtSNZ6HNLOi75A2m8nVWZrdBZ_Ivf58osDAS8/edit?gid=294497137#gid=294497137"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"typeVersion": 4.6
},
{
"id": "30ecf24a-2012-4751-a7fd-712fa498ac46",
"name": "Respond to Webhook",
"type": "n8n-nodes-base.respondToWebhook",
"position": [
220,
320
],
"parameters": {
"options": {}
},
"typeVersion": 1.3
},
{
"id": "a6293ef9-fd50-439e-a906-c9e03e97d0bc",
"name": "Evaluating?",
"type": "n8n-nodes-base.evaluation",
"position": [
-60,
200
],
"parameters": {
"operation": "checkIfEvaluating"
},
"typeVersion": 4.6
},
{
"id": "db1b0fac-0268-44c3-87ce-af552bb6c42d",
"name": "Set metrics",
"type": "n8n-nodes-base.evaluation",
"position": [
440,
80
],
"parameters": {
"metrics": {
"assignments": [
{
"id": "0e507b06-e6d5-4ace-aa22-f06c6db5b883",
"name": "category_match",
"type": "number",
"value": "={{ $json.category_match.toNumber() }}"
},
{
"id": "44918a17-d8b9-41e1-b336-3ee67b86b528",
"name": "priority_match",
"type": "number",
"value": "={{ $json.priority_match.toNumber() }}"
}
]
},
"operation": "setMetrics"
},
"typeVersion": 4.6
}
],
"connections": {
"Webhook": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[
{
"node": "Evaluating?",
"type": "main",
"index": 0
}
]
]
},
"Evaluating?": {
"main": [
[
{
"node": "Check categorization",
"type": "main",
"index": 0
}
],
[
{
"node": "Respond to Webhook",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Check categorization": {
"main": [
[
{
"node": "Set metrics",
"type": "main",
"index": 0
}
]
]
},
"Match webhook format": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "AI Agent",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"When fetching a dataset row": {
"main": [
[
{
"node": "Match webhook format",
"type": "main",
"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.
googleSheetsOAuth2ApiopenAiApi
Pro
For the full experience including quality scoring and batch install features for each workflow upgrade to Pro
About this workflow
This is a template for n8n's evaluation feature.
Source: https://n8n.io/workflows/4269/ — original creator credit. Request a take-down →
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