This workflow follows the Execute Workflow Trigger → HTTP Request recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
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{
"name": "DocFlow 03 - Classifier",
"nodes": [
{
"parameters": {},
"id": "trigger-03",
"name": "When Called by Workflow",
"type": "n8n-nodes-base.executeWorkflowTrigger",
"typeVersion": 1,
"position": [
240,
300
]
},
{
"parameters": {
"method": "POST",
"url": "https://openrouter.ai/api/v1/chat/completions",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
},
{
"name": "HTTP-Referer",
"value": "https://docflow.local"
},
{
"name": "X-Title",
"value": "DocFlow AI"
}
]
},
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"model\": \"openai/gpt-4o-mini\",\n \"messages\": [\n {\"role\": \"system\", \"content\": \"You are a document classifier. Classify the document text as exactly one of: invoice (bills, receipts, POs, credit notes), contract (service agreements, NDAs, leases, vendor agreements), form (application/intake/registration forms), or unknown. Respond with JSON only: {type, confidence (0..1), reasoning (one sentence)}. If a document has total + vendor + invoice number it's an invoice even with contract-like language. If it defines obligations between named parties without itemized totals it's a contract. If it has labeled fields meant to be filled in, it's a form.\"},\n {\"role\": \"user\", \"content\": $json.raw_text}\n ],\n \"response_format\": {\"type\": \"json_object\"},\n \"temperature\": 0.1,\n \"max_tokens\": 200\n}",
"options": {
"response": {
"response": {
"responseFormat": "json"
}
},
"timeout": 30000,
"retry": {
"tries": 3,
"waitBetweenTries": 2000
}
}
},
"id": "llm-03",
"name": "Call OpenRouter (Classify)",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
460,
300
],
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"jsCode": "const env = $('When Called by Workflow').first().json;\nconst raw = $input.first().json;\nconst content = raw?.choices?.[0]?.message?.content ?? '{}';\nlet parsed;\ntry { parsed = JSON.parse(content); }\ncatch (e) { parsed = { type: 'unknown', confidence: 0.0, reasoning: 'json_parse_error' }; }\nreturn [{ json: { ...env, type: parsed.type, type_confidence: parsed.confidence, type_reasoning: parsed.reasoning } }];"
},
"id": "parse-03",
"name": "Parse Classification",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
680,
300
]
},
{
"parameters": {
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict"
},
"conditions": [
{
"id": "conf-gate-03",
"leftValue": "={{ $json.type_confidence }}",
"rightValue": "={{ $json.client_config?.thresholds?.classify_min_confidence ?? 0.7 }}",
"operator": {
"type": "number",
"operation": "gte"
}
},
{
"id": "type-not-unknown",
"leftValue": "={{ $json.type }}",
"rightValue": "unknown",
"operator": {
"type": "string",
"operation": "notEquals"
}
}
],
"combinator": "and"
},
"options": {}
},
"id": "gate-03",
"name": "Confidence Gate",
"type": "n8n-nodes-base.if",
"typeVersion": 2,
"position": [
900,
300
]
},
{
"parameters": {
"rules": {
"values": [
{
"outputKey": "invoice",
"conditions": {
"options": {
"caseSensitive": true,
"typeValidation": "strict",
"leftValue": ""
},
"conditions": [
{
"id": "is-invoice",
"leftValue": "={{ $json.type }}",
"rightValue": "invoice",
"operator": {
"type": "string",
"operation": "equals"
}
}
],
"combinator": "and"
}
},
{
"outputKey": "contract",
"conditions": {
"options": {
"caseSensitive": true,
"typeValidation": "strict",
"leftValue": ""
},
"conditions": [
{
"id": "is-contract",
"leftValue": "={{ $json.type }}",
"rightValue": "contract",
"operator": {
"type": "string",
"operation": "equals"
}
}
],
"combinator": "and"
}
},
{
"outputKey": "form",
"conditions": {
"options": {
"caseSensitive": true,
"typeValidation": "strict",
"leftValue": ""
},
"conditions": [
{
"id": "is-form",
"leftValue": "={{ $json.type }}",
"rightValue": "form",
"operator": {
"type": "string",
"operation": "equals"
}
}
],
"combinator": "and"
}
}
]
},
"options": {}
},
"id": "type-switch-03",
"name": "Type Switch",
"type": "n8n-nodes-base.switch",
"typeVersion": 3.2,
"position": [
1120,
200
]
},
{
"parameters": {
"workflowId": {
"__rl": true,
"value": "REPLACE_WITH_WORKFLOW_04_ID",
"mode": "id"
},
"options": {}
},
"id": "call-04",
"name": "Call Invoice Extractor",
"type": "n8n-nodes-base.executeWorkflow",
"typeVersion": 1.2,
"position": [
1340,
100
]
},
{
"parameters": {
"workflowId": {
"__rl": true,
"value": "REPLACE_WITH_WORKFLOW_05_ID",
"mode": "id"
},
"options": {}
},
"id": "call-05",
"name": "Call Contract Extractor",
"type": "n8n-nodes-base.executeWorkflow",
"typeVersion": 1.2,
"position": [
1340,
220
]
},
{
"parameters": {
"workflowId": {
"__rl": true,
"value": "REPLACE_WITH_WORKFLOW_06_ID",
"mode": "id"
},
"options": {}
},
"id": "call-06",
"name": "Call Form Extractor",
"type": "n8n-nodes-base.executeWorkflow",
"typeVersion": 1.2,
"position": [
1340,
340
]
},
{
"parameters": {
"jsCode": "const env = $input.first().json;\nenv.review_reason = (env.type === 'unknown') ? 'classify_unknown' : 'classify_low_conf';\nreturn [{ json: env }];"
},
"id": "tag-review-03",
"name": "Tag Review Reason",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
1120,
460
]
},
{
"parameters": {
"workflowId": {
"__rl": true,
"value": "REPLACE_WITH_WORKFLOW_07_ID",
"mode": "id"
},
"options": {}
},
"id": "call-07-from-03",
"name": "Route to Review",
"type": "n8n-nodes-base.executeWorkflow",
"typeVersion": 1.2,
"position": [
1340,
460
]
}
],
"connections": {
"When Called by Workflow": {
"main": [
[
{
"node": "Call OpenRouter (Classify)",
"type": "main",
"index": 0
}
]
]
},
"Call OpenRouter (Classify)": {
"main": [
[
{
"node": "Parse Classification",
"type": "main",
"index": 0
}
]
]
},
"Parse Classification": {
"main": [
[
{
"node": "Confidence Gate",
"type": "main",
"index": 0
}
]
]
},
"Confidence Gate": {
"main": [
[
{
"node": "Type Switch",
"type": "main",
"index": 0
}
],
[
{
"node": "Tag Review Reason",
"type": "main",
"index": 0
}
]
]
},
"Type Switch": {
"main": [
[
{
"node": "Call Invoice Extractor",
"type": "main",
"index": 0
}
],
[
{
"node": "Call Contract Extractor",
"type": "main",
"index": 0
}
],
[
{
"node": "Call Form Extractor",
"type": "main",
"index": 0
}
]
]
},
"Tag Review Reason": {
"main": [
[
{
"node": "Route to Review",
"type": "main",
"index": 0
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"tags": [
{
"name": "docflow"
}
]
}
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.
httpHeaderAuth
Pro
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About this workflow
DocFlow 03 - Classifier. Uses executeWorkflowTrigger, httpRequest. Event-driven trigger; 10 nodes.
Source: https://github.com/Moamen-Elsharkawy/docflow-ai/blob/main/n8n-exports/03-classifier.json — original creator credit. Request a take-down →
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