Smartlead API for Agencies: 10 Automations That Save 10+ Hours a Week

POST https://server.smartlead.ai/api/v1/campaigns/{campaign_id}/leads?api_key=YOUR_KEY

Body:
{
  "lead_list": [
    {
      "email": "[email protected]",
      "first_name": "John",
      "last_name": "Doe",
      "company_name": "Acme Corp",
      "custom_fields": {
        "icebreaker": "Saw your post on LinkedIn about scaling outbound — loved the take on AI personalization."
      }
    }
  ],
  "settings": {
    "ignore_global_block_list": false,
    "ignore_bounce_list": false
  }
}

// Pull campaign statistics
GET /api/v1/campaigns/{id}/statistics/by-date?api_key=KEY&start_date=2024-01-01&end_date=2024-01-08

// Check if reply rate drops below 1% over 3 days
const stats = items[0].json;
const recentDays = stats.slice(-3);
const avgReplyRate = recentDays.reduce((sum, d) => sum + d.reply_rate, 0) / 3;

if (avgReplyRate < 0.01) {
  // Pause the campaign
  return [{ pause_campaign: true, campaign_id: campaignId }];
}

// PATCH to pause
PATCH /api/v1/campaigns/{id}/status
Body: { "status": "PAUSED" }

// 1. Smartlead Webhook fires on reply
Trigger: Smartlead Webhook → "reply_received"

// 2. Payload received:
{
  "lead_email": "[email protected]",
  "campaign_id": 456,
  "reply_text": "Yes, interested — can we chat Thursday?",
  "reply_category": "Interested"
}

// 3. n8n looks up contact in HubSpot by email
HubSpot Node: GET /contacts/v1/contact/email/{email}/profile

// 4. Update contact properties
HubSpot Node: PATCH /contacts/v1/contact/{id}/profile
{
  "properties": [
    { "property": "lifecycle_stage", "value": "salesqualifiedlead" },
    { "property": "smartlead_reply_category", "value": "Interested" },
    { "property": "last_reply_date", "value": "2026-03-08" }
  ]
}

# Get campaign-level analytics
GET /api/v1/campaigns/{id}/analytics?api_key=KEY

# Response includes:
{
  "total_sent": 4821,
  "open_count": 1834,
  "open_rate": 38.04,
  "reply_count": 127,
  "reply_rate": 2.63,
  "positive_reply_count": 38,
  "bounce_count": 12,
  "unsubscribe_count": 7
}

# Push this to Google Sheets once per day via n8n scheduler

Trigger: Typeform / Tally webhook → new submission

// Map form fields to Smartlead lead format
{
  "email": "{{form.email}}",
  "first_name": "{{form.first_name}}",
  "company_name": "{{form.company}}",
  "custom_fields": {
    "source": "website_form",
    "interest": "{{form.interest}}"
  }
}

// POST to nurture campaign
POST /api/v1/campaigns/{nurture_campaign_id}/leads?api_key=KEY

# Add email to global block list when "unsubscribe" reply is received
POST /api/v1/block_list?api_key=KEY
Body: {
  "emails": ["[email protected]"]
}

# The block list applies across ALL campaigns in your account
# Set up in n8n: Smartlead webhook (reply_category: Unsubscribe) → POST to block_list

// Schedule: every morning at 8 AM
Cron Node: "0 8 * * *"

// Pull all email accounts
GET /api/v1/email-accounts?api_key=KEY

// Filter those below health threshold
items.filter(inbox => inbox.warmup_reputation < 70)

// Format Slack message
{
  "text": "⚠️ Inbox Health Alert",
  "blocks": [{
    "type": "section",
    "text": {
      "type": "mrkdwn",
      "text": "*Low health inboxes detected:*
- {{inbox.email}} — Score: {{inbox.warmup_reputation}}/100
- Action: Reduce send volume and check spam filter hits"
    }
  }]
}

// POST to Slack webhook

# 1. Get your template campaign's full config
GET /api/v1/campaigns/{template_id}?api_key=KEY

# 2. Create new campaign with same sequence, settings, and schedules
POST /api/v1/campaigns?api_key=KEY
Body: {
  "name": "Client B — Outbound Q2 2026",
  "from_name": "{{client_b_sender_name}}",
  "from_email": "{{client_b_email}}",
  "subject": "{{cloned_from_template}}",
  ...
}

# 3. Assign the client's email account to the new campaign
POST /api/v1/campaigns/{new_id}/email-accounts?api_key=KEY
Body: { "email_account_ids": [{{client_b_inbox_id}}] }

# Full onboarding: ~3 API calls. Manual approach: 15–20 minutes per client

// Get daily stats for last 30 days
GET /api/v1/campaigns/{id}/statistics/by-date?api_key=KEY

// Find highest-reply days
const dayStats = {}; // { Mon: [], Tue: [], ... }
stats.forEach(day => {
  const dow = new Date(day.date).toLocaleDateString('en', {weekday: 'short'});
  dayStats[dow] = [...(dayStats[dow] || []), day.reply_rate];
});

// Get top 3 days by avg reply rate
const topDays = Object.entries(dayStats)
  .map(([day, rates]) => ({ day, avg: rates.reduce((a,b) => a+b)/rates.length }))
  .sort((a,b) => b.avg - a.avg)
  .slice(0, 3)
  .map(d => d.day);

// Update campaign schedule to only send on topDays
PATCH /api/v1/campaigns/{id}/schedule?api_key=KEY

// Trigger: Clearbit Reveal webhook → company identified on pricing page
// or: Albacross webhook → company identified

// 1. Check if email matches an existing Smartlead lead
GET /api/v1/leads?api_key=KEY&email={{identified_email}}

// 2. If found and status = "No Reply"
if (lead.status === 'NOT_REPLIED') {
  // 3. Move to a "warm follow-up" campaign
  POST /api/v1/campaigns/{warm_followup_campaign}/leads?api_key=KEY
  Body: {
    "lead_list": [{ "email": "{{lead.email}}", "custom_fields": {
      "trigger": "visited_pricing_page",
      "visit_date": "{{today}}"
    }}]
  }
}