This workflow follows the Gmail → HTTP Request 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": "Inbound Lead Responder",
"nodes": [
{
"parameters": {
"content": "## Inbound Lead Responder\n\n**What this does:**\nReceives inbound leads via webhook, classifies them with an LLM (OpenRouter / owl-alpha), and drafts personalized replies for high-value categories.\n\n**Flow:**\n1. Webhook receives POST /inbound-lead\n2. Normalize Lead extracts fields (with sample-data fallback)\n3. Classify Lead \u2192 category + urgency_score + intent_summary\n4. Parse Classification (try/catch JSON)\n5. Route by Category:\n - spam / support \u2192 straight to Ack\n - hot_lead / partnership \u2192 Draft Reply \u2192 Format \u2192 Gmail \u2192 Slack \u2192 Ack\n6. Acknowledge Webhook returns JSON status\n\n**Required env / creds:**\n- OpenRouter API (httpHeaderAuth)\n- Gmail OAuth2\n- SLACK_WEBHOOK_URL env var",
"height": 520,
"width": 460
},
"id": "sticky-doc-1",
"name": "Workflow Docs",
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-200,
-40
]
},
{
"parameters": {
"httpMethod": "POST",
"path": "inbound-lead",
"responseMode": "responseNode",
"options": {}
},
"id": "webhook-1",
"name": "Webhook",
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
340,
320
]
},
{
"parameters": {
"mode": "manual",
"duplicateItem": false,
"assignments": {
"assignments": [
{
"id": "field-name",
"name": "name",
"value": "={{ $json.body?.name || \"Jordan Maxwell\" }}",
"type": "string"
},
{
"id": "field-email",
"name": "email",
"value": "={{ $json.body?.email || \"jordan@acmewidgets.com\" }}",
"type": "string"
},
{
"id": "field-message",
"name": "message",
"value": "={{ $json.body?.message || \"Hi \u2014 I run a 12-person agency and we're hitting a ceiling on growth. Our flywheel keeps stalling and we're losing roughly $40k MRR to churn each quarter. Curious if your team works with shops our size on retention systems. Open to a quick call next week.\" }}",
"type": "string"
},
{
"id": "field-source",
"name": "source",
"value": "={{ $json.body?.source || \"contact-form\" }}",
"type": "string"
},
{
"id": "field-company",
"name": "company",
"value": "={{ $json.body?.company || \"Acme Widgets\" }}",
"type": "string"
},
{
"id": "field-received-at",
"name": "received_at",
"value": "={{ $now.toISO() }}",
"type": "string"
}
]
},
"options": {}
},
"id": "normalize-1",
"name": "Normalize Lead",
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
560,
320
]
},
{
"parameters": {
"method": "POST",
"url": "https://openrouter.ai/api/v1/chat/completions",
"authentication": "predefinedCredentialType",
"nodeCredentialType": "httpHeaderAuth",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "HTTP-Referer",
"value": "https://github.com/BiG-Zach/inbound-lead-responder-n8n"
},
{
"name": "X-Title",
"value": "Inbound Lead Responder"
},
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"model\": \"openrouter/owl-alpha\",\n \"messages\": [\n {\n \"role\": \"system\",\n \"content\": \"You are a lead-classification assistant. Read the inbound message and return STRICT JSON only, no prose, no markdown fences. Schema: {\\\"category\\\": one of [\\\"hot_lead\\\", \\\"cold_lead\\\", \\\"support\\\", \\\"spam\\\", \\\"partnership\\\"], \\\"urgency_score\\\": integer 1-10, \\\"intent_summary\\\": short string under 200 chars}. hot_lead = clear buying intent or budget mentioned. cold_lead = vague curiosity. support = existing customer asking for help. spam = promotional/irrelevant. partnership = vendor/affiliate/collab outreach.\"\n },\n {\n \"role\": \"user\",\n \"content\": {{ JSON.stringify(\"Name: \" + $json.name + \"\\nEmail: \" + $json.email + \"\\nCompany: \" + $json.company + \"\\nSource: \" + $json.source + \"\\nMessage:\\n\" + $json.message) }}\n }\n ],\n \"temperature\": 0.2,\n \"response_format\": {\"type\": \"json_object\"}\n}",
"options": {
"timeout": 30000
}
},
"id": "classify-1",
"name": "Classify Lead",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
780,
320
],
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"jsCode": "// Parse the OpenRouter classification response with a safe fallback.\nconst lead = $('Normalize Lead').item.json;\nconst raw = $input.item.json;\n\nlet category = 'cold_lead';\nlet urgency_score = 5;\nlet intent_summary = 'Unclassified \u2014 parser fallback.';\n\ntry {\n const content = raw?.choices?.[0]?.message?.content;\n if (!content) throw new Error('No content in LLM response');\n\n // Strip possible markdown fencing just in case.\n const cleaned = String(content).replace(/^```(?:json)?\\s*/i, '').replace(/```\\s*$/,'').trim();\n const parsed = JSON.parse(cleaned);\n\n if (parsed.category) category = String(parsed.category).toLowerCase().trim();\n if (Number.isFinite(parsed.urgency_score)) {\n urgency_score = Math.min(10, Math.max(1, Math.round(parsed.urgency_score)));\n }\n if (parsed.intent_summary) intent_summary = String(parsed.intent_summary).slice(0, 240);\n\n const allowed = ['hot_lead','cold_lead','support','spam','partnership'];\n if (!allowed.includes(category)) category = 'cold_lead';\n} catch (err) {\n intent_summary = 'Classifier parse error: ' + (err?.message || 'unknown') + '. Defaulting to cold_lead.';\n}\n\nreturn [{\n json: {\n ...lead,\n category,\n urgency_score,\n intent_summary\n }\n}];"
},
"id": "parse-1",
"name": "Parse Classification",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
1000,
320
]
},
{
"parameters": {
"rules": {
"values": [
{
"conditions": {
"options": {
"caseSensitive": false,
"leftValue": "",
"typeValidation": "loose",
"version": 2
},
"conditions": [
{
"id": "cond-spam",
"leftValue": "={{ $json.category }}",
"rightValue": "spam",
"operator": {
"type": "string",
"operation": "equals"
}
}
],
"combinator": "and"
},
"outputKey": "spam"
},
{
"conditions": {
"options": {
"caseSensitive": false,
"leftValue": "",
"typeValidation": "loose",
"version": 2
},
"conditions": [
{
"id": "cond-support",
"leftValue": "={{ $json.category }}",
"rightValue": "support",
"operator": {
"type": "string",
"operation": "equals"
}
}
],
"combinator": "and"
},
"outputKey": "support"
},
{
"conditions": {
"options": {
"caseSensitive": false,
"leftValue": "",
"typeValidation": "loose",
"version": 2
},
"conditions": [
{
"id": "cond-hot",
"leftValue": "={{ $json.category }}",
"rightValue": "hot_lead",
"operator": {
"type": "string",
"operation": "equals"
}
},
{
"id": "cond-partnership",
"leftValue": "={{ $json.category }}",
"rightValue": "partnership",
"operator": {
"type": "string",
"operation": "equals"
}
}
],
"combinator": "or"
},
"outputKey": "high_priority"
}
]
},
"options": {
"fallbackOutput": "extra",
"renameFallbackOutput": "fallback"
}
},
"id": "switch-1",
"name": "Route by Category",
"type": "n8n-nodes-base.switch",
"typeVersion": 3.2,
"position": [
1220,
320
]
},
{
"parameters": {
"method": "POST",
"url": "https://openrouter.ai/api/v1/chat/completions",
"authentication": "predefinedCredentialType",
"nodeCredentialType": "httpHeaderAuth",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "HTTP-Referer",
"value": "https://github.com/BiG-Zach/inbound-lead-responder-n8n"
},
{
"name": "X-Title",
"value": "Inbound Lead Responder"
},
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"model\": \"openrouter/owl-alpha\",\n \"messages\": [\n {\n \"role\": \"system\",\n \"content\": \"You draft warm, personalized replies to inbound leads. Output ONLY the reply body \u2014 no subject line, no preamble, no quoted message. Constraints: exactly 3 sentences. Reference one specific detail from the lead's message. Friendly but not gushing. End with a clear next step. Sign off with the literal string [Your Name] on its own line.\"\n },\n {\n \"role\": \"user\",\n \"content\": {{ JSON.stringify(\"Lead name: \" + $json.name + \"\\nCompany: \" + $json.company + \"\\nCategory: \" + $json.category + \"\\nUrgency: \" + $json.urgency_score + \"/10\\nIntent: \" + $json.intent_summary + \"\\n\\nOriginal message:\\n\" + $json.message) }}\n }\n ],\n \"temperature\": 0.7,\n \"max_tokens\": 400\n}",
"options": {
"timeout": 30000
}
},
"id": "draft-1",
"name": "Draft High-Priority Reply",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
1480,
220
],
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"jsCode": "// Merge the drafted reply with the lead context so downstream nodes have everything.\nconst lead = $('Parse Classification').item.json;\nconst draft = $input.item.json;\n\nlet body = '';\ntry {\n body = draft?.choices?.[0]?.message?.content?.trim() || '';\n} catch (e) {\n body = '';\n}\n\nif (!body) {\n body = `Hi ${lead.name || 'there'},\\n\\nThanks for reaching out \u2014 we'd love to learn more about what you're working on. Mind if I send over a couple of times for a quick call this week?\\n\\n[Your Name]`;\n}\n\nconst source = lead.source || 'your inquiry';\nconst subject = `Re: your message about ${source}`;\n\nreturn [{\n json: {\n ...lead,\n reply_subject: subject,\n reply_body: body,\n to_email: lead.email,\n to_name: lead.name\n }\n}];"
},
"id": "format-1",
"name": "Format Reply",
"type": "n8n-nodes-base.code",
"typeVersion": 2,
"position": [
1700,
220
]
},
{
"parameters": {
"sendTo": "={{ $json.to_email }}",
"subject": "={{ $json.reply_subject }}",
"emailType": "text",
"message": "={{ $json.reply_body }}",
"options": {
"appendAttribution": false
}
},
"id": "gmail-1",
"name": "Send Email Reply",
"type": "n8n-nodes-base.gmail",
"typeVersion": 2.1,
"position": [
1920,
220
],
"continueOnFail": true,
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"method": "POST",
"url": "={{ $env.SLACK_WEBHOOK_URL }}",
"sendHeaders": true,
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"text\": {{ JSON.stringify(\"\ud83d\udd25 New \" + $json.category + \" (urgency \" + $json.urgency_score + \"/10) from \" + $json.name + \" <\" + $json.email + \">\\n*Intent:* \" + $json.intent_summary + \"\\n*Draft sent:* \" + $json.reply_subject) }}\n}",
"options": {
"timeout": 15000
}
},
"id": "slack-1",
"name": "Notify Slack",
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
2140,
220
],
"continueOnFail": true
},
{
"parameters": {
"respondWith": "json",
"responseBody": "={\n \"status\": \"received\",\n \"category\": \"{{ $json.category }}\",\n \"urgency\": {{ $json.urgency_score }}\n}",
"options": {}
},
"id": "respond-1",
"name": "Acknowledge Webhook",
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.1,
"position": [
2360,
320
]
}
],
"connections": {
"Webhook": {
"main": [
[
{
"node": "Normalize Lead",
"type": "main",
"index": 0
}
]
]
},
"Normalize Lead": {
"main": [
[
{
"node": "Classify Lead",
"type": "main",
"index": 0
}
]
]
},
"Classify Lead": {
"main": [
[
{
"node": "Parse Classification",
"type": "main",
"index": 0
}
]
]
},
"Parse Classification": {
"main": [
[
{
"node": "Route by Category",
"type": "main",
"index": 0
}
]
]
},
"Route by Category": {
"main": [
[
{
"node": "Acknowledge Webhook",
"type": "main",
"index": 0
}
],
[
{
"node": "Acknowledge Webhook",
"type": "main",
"index": 0
}
],
[
{
"node": "Draft High-Priority Reply",
"type": "main",
"index": 0
}
],
[
{
"node": "Acknowledge Webhook",
"type": "main",
"index": 0
}
]
]
},
"Draft High-Priority Reply": {
"main": [
[
{
"node": "Format Reply",
"type": "main",
"index": 0
}
]
]
},
"Format Reply": {
"main": [
[
{
"node": "Send Email Reply",
"type": "main",
"index": 0
}
]
]
},
"Send Email Reply": {
"main": [
[
{
"node": "Notify Slack",
"type": "main",
"index": 0
}
]
]
},
"Notify Slack": {
"main": [
[
{
"node": "Acknowledge Webhook",
"type": "main",
"index": 0
}
]
]
}
},
"settings": {
"executionOrder": "v1"
},
"meta": {
"templateCredsSetupCompleted": false
},
"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.
gmailOAuth2httpHeaderAuth
Pro
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About this workflow
Inbound Lead Responder. Uses httpRequest, gmail. Webhook trigger; 11 nodes.
Source: https://github.com/BiG-Zach/inbound-lead-responder-n8n/blob/main/workflow.json — original creator credit. Request a take-down →
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