Getting Started Guide

Overview

This guide walks you through everything you need to go from zero to a live email campaign using the SmartLead API. By the end, you’ll have created a campaign, added email accounts, imported leads, configured sequences, and started sending — all through code.

Prerequisites

Before you begin, make sure you have:

A SmartLead account (sign up here)
At least one email account ready (Gmail, Outlook, or SMTP credentials)
Basic familiarity with REST APIs and HTTP requests
A tool for making API calls (cURL, Postman, or any HTTP client library)

Step 1: Get Your API Key

Go to app.smartlead.ai and sign in with your credentials.

Open API Settings

Navigate to Settings → API Keys from the left sidebar.

Generate a Key

Click Generate New API Key, give it a descriptive name (e.g., “Production API” or “Dev Testing”), and copy the key immediately.

Your API key is shown only once. Store it in a secure location like an environment variable or secrets manager. Never hardcode it in source files or commit it to version control.

Store Your Key Securely

.env

SMARTLEAD_API_KEY=your_api_key_here

Python

import os
API_KEY = os.getenv("SMARTLEAD_API_KEY")
BASE_URL = "https://server.smartlead.ai/api/v1"

JavaScript

const API_KEY = process.env.SMARTLEAD_API_KEY;
const BASE_URL = 'https://server.smartlead.ai/api/v1';

Step 2: Verify Your Connection

Test that your API key works by fetching your campaigns:

curl -X GET "https://server.smartlead.ai/api/v1/campaigns/?api_key=$SMARTLEAD_API_KEY"

A successful response looks like:

{
  "campaigns": [],
  "total_count": 0
}

Step 3: Create a Campaign

Now create your first campaign:

campaign_payload = {
    "name": "Q1 2025 SaaS Outreach",
    "track_settings": {
        "track_open": True,
        "track_click": True
    }
}

response = requests.post(
    f"{BASE_URL}/campaigns/create",
    params={"api_key": API_KEY},
    json=campaign_payload
)

campaign = response.json()
campaign_id = campaign["campaign"]["id"]
print(f"Campaign created: ID {campaign_id}")

Step 4: Add an Email Account

You need at least one sending account. Here’s how to add an SMTP account:

Python

email_account_payload = {
    "from_name": "Sarah Johnson",
    "from_email": "sarah@yourcompany.com",
    "user_name": "sarah@yourcompany.com",
    "password": "your_app_password",
    "smtp_host": "smtp.yourprovider.com",
    "smtp_port": 587,
    "imap_host": "imap.yourprovider.com",
    "imap_port": 993,
    "max_email_per_day": 40,
    "warmup_enabled": True,
    "total_warmup_per_day": 20,
    "daily_rampup": 2,
    "reply_rate_percentage": 30
}

response = requests.post(
    f"{BASE_URL}/email-accounts/save",
    params={"api_key": API_KEY},
    json=email_account_payload
)

account = response.json()
email_account_id = account["email_account"]["id"]
print(f"Email account added: ID {email_account_id}")

Then connect it to your campaign:

Python

response = requests.post(
    f"{BASE_URL}/campaigns/{campaign_id}/email-accounts",
    params={"api_key": API_KEY},
    json={"email_account_ids": [email_account_id]}
)

print("Email account linked to campaign!")

For best deliverability, warm up new email accounts for at least 14 days before adding them to active campaigns. See the Email Warmup Guide for details.

Step 5: Create Email Sequences

Add your outreach emails and follow-ups:

Python

sequences_payload = {
    "sequences": [
        {
            "seq_number": 1,
            "subject": "Quick question about {{company_name}}",
            "email_body": """Hi {{first_name}},

I came across {{company_name}} and noticed you're in the {{industry}} space.

We help companies like yours increase outbound pipeline by 3x through automated cold email. Companies like [relevant reference] saw results within the first month.

Would it make sense to chat for 15 minutes this week?

Best,
Sarah""",
            "seq_delay_details": {"delay_in_days": 0}
        },
        {
            "seq_number": 2,
            "subject": "Re: Quick question about {{company_name}}",
            "email_body": """Hi {{first_name}},

Following up on my note — I wanted to share a quick case study that might be relevant.

[Case study company] in {{industry}} increased their reply rates from 2% to 12% after switching to our approach.

Worth a quick call?

Sarah""",
            "seq_delay_details": {"delay_in_days": 3}
        },
        {
            "seq_number": 3,
            "subject": "Re: Quick question about {{company_name}}",
            "email_body": """Hi {{first_name}},

I don't want to be a pest — just wanted to check if this is something {{company_name}} is thinking about right now.

If the timing isn't right, no worries at all. Happy to reconnect later.

Best,
Sarah""",
            "seq_delay_details": {"delay_in_days": 5}
        }
    ]
}

response = requests.post(
    f"{BASE_URL}/campaigns/{campaign_id}/sequences",
    params={"api_key": API_KEY},
    json=sequences_payload
)

print("Sequences created!")

Step 6: Import Leads

Add prospects to your campaign (max 400 per request):

Python

leads_payload = {
    "lead_list": [
        {
            "email": "alex@acmecorp.com",
            "first_name": "Alex",
            "last_name": "Chen",
            "company_name": "Acme Corp",
            "custom_fields": {
                "job_title": "VP of Sales",
                "industry": "B2B SaaS",
                "company_size": "50-200"
            }
        },
        {
            "email": "maria@techstartup.io",
            "first_name": "Maria",
            "last_name": "Garcia",
            "company_name": "TechStartup",
            "custom_fields": {
                "job_title": "Head of Growth",
                "industry": "Fintech",
                "company_size": "20-50"
            }
        }
    ],
    "settings": {
        "ignore_global_block_list": False,
        "ignore_unsubscribe_list": False,
        "ignore_duplicate_leads_in_other_campaign": False
    }
}

response = requests.post(
    f"{BASE_URL}/campaigns/{campaign_id}/leads",
    params={"api_key": API_KEY},
    json=leads_payload
)

result = response.json()
print(f"Added: {result['added_count']}, Skipped: {result['skipped_count']}")

SmartLead automatically validates emails against block lists and checks for duplicates. Skipped leads will include a reason in the response.

Step 7: Configure Schedule & Start

Set your sending schedule, then activate:

Python

# Set schedule (Monday-Friday, 9am-5pm EST)
schedule_payload = {
    "timezone": "America/New_York",
    "days_of_the_week": [1, 2, 3, 4, 5],
    "start_hour": "09:00",
    "end_hour": "17:00",
    "min_time_btw_emails": 8,
    "max_new_leads_per_day": 30
}

requests.post(
    f"{BASE_URL}/campaigns/{campaign_id}/schedule",
    params={"api_key": API_KEY},
    json=schedule_payload
)

# Activate the campaign
requests.post(
    f"{BASE_URL}/campaigns/{campaign_id}/status",
    params={"api_key": API_KEY},
    json={"status": "ACTIVE"}
)

print("Campaign is now ACTIVE and sending!")

Your first campaign is live! SmartLead will now send emails according to your schedule, rotating between connected email accounts.

Complete Working Example

Here’s the full script combining all steps:

Python

import requests
import os

API_KEY = os.getenv("SMARTLEAD_API_KEY")
BASE_URL = "https://server.smartlead.ai/api/v1"

def make_request(method, endpoint, payload=None):
    """Helper to make API requests with error handling."""
    url = f"{BASE_URL}/{endpoint}"
    params = {"api_key": API_KEY}

    if method == "GET":
        response = requests.get(url, params=params)
    elif method == "POST":
        response = requests.post(url, params=params, json=payload)
    elif method == "PATCH":
        response = requests.patch(url, params=params, json=payload)

    if response.status_code not in [200, 201]:
        raise Exception(f"API error {response.status_code}: {response.text}")

    return response.json()

# 1. Create campaign
campaign = make_request("POST", "campaigns/create", {
    "name": "Q1 2025 SaaS Outreach"
})
campaign_id = campaign["campaign"]["id"]
print(f"✓ Campaign created: {campaign_id}")

# 2. Add sequences
make_request("POST", f"campaigns/{campaign_id}/sequences", {
    "sequences": [
        {
            "seq_number": 1,
            "subject": "Quick question about {{company_name}}",
            "email_body": "Hi {{first_name}},\n\nI came across {{company_name}}...",
            "seq_delay_details": {"delay_in_days": 0}
        },
        {
            "seq_number": 2,
            "subject": "Re: Quick question about {{company_name}}",
            "email_body": "Hi {{first_name}},\n\nFollowing up...",
            "seq_delay_details": {"delay_in_days": 3}
        }
    ]
})
print("✓ Sequences added")

# 3. Link email accounts (use your existing account IDs)
make_request("POST", f"campaigns/{campaign_id}/email-accounts", {
    "email_account_ids": [YOUR_EMAIL_ACCOUNT_ID]
})
print("✓ Email accounts linked")

# 4. Import leads
result = make_request("POST", f"campaigns/{campaign_id}/leads", {
    "lead_list": [
        {
            "email": "prospect@example.com",
            "first_name": "Alex",
            "company_name": "Acme Corp",
            "custom_fields": {"job_title": "VP Sales"}
        }
    ]
})
print(f"✓ Leads added: {result['added_count']}")

# 5. Set schedule and activate
make_request("POST", f"campaigns/{campaign_id}/schedule", {
    "timezone": "America/New_York",
    "days_of_the_week": [1, 2, 3, 4, 5],
    "start_hour": "09:00",
    "end_hour": "17:00"
})

make_request("POST", f"campaigns/{campaign_id}/status", {
    "status": "ACTIVE"
})
print("✓ Campaign is ACTIVE!")

What’s Next?

Campaign Setup Guide

Advanced campaign configuration and optimization

Email Warmup Guide

Warm up accounts for maximum deliverability

Lead Management Guide

Import, segment, and manage leads at scale

Webhook Integration

Connect SmartLead to your CRM and tools

Get Started

Core Concepts

Guides

Overview

Prerequisites

Step 1: Get Your API Key

Store Your Key Securely

Step 2: Verify Your Connection

Step 3: Create a Campaign

Step 4: Add an Email Account

Step 5: Create Email Sequences

Step 6: Import Leads

Step 7: Configure Schedule & Start

Complete Working Example

What’s Next?

Campaign Setup Guide

Email Warmup Guide

Lead Management Guide

Webhook Integration

Get Started

Core Concepts

Guides

​Overview

​Prerequisites

​Step 1: Get Your API Key

​Store Your Key Securely

​Step 2: Verify Your Connection

​Step 3: Create a Campaign

​Step 4: Add an Email Account

​Step 5: Create Email Sequences

​Step 6: Import Leads

​Step 7: Configure Schedule & Start

​Complete Working Example

​What’s Next?

Campaign Setup Guide

Email Warmup Guide

Lead Management Guide

Webhook Integration

Overview

Prerequisites

Step 1: Get Your API Key

Store Your Key Securely

Step 2: Verify Your Connection

Step 3: Create a Campaign

Step 4: Add an Email Account

Step 5: Create Email Sequences

Step 6: Import Leads

Step 7: Configure Schedule & Start

Complete Working Example

What’s Next?