Tracking Cold Email Engagement Metrics using Smartlead and Google Sheets

Created by

Rahi Uppal

Last update

Last update a day ago

Workflow: Track Email Campaign Engagement Analytics with Smartlead and Google Sheets

Automatically fetch lead-level email engagement analytics (opens, clicks, replies, unsubscribes, bounces) from Smartlead and update them in Google Sheets.
Use this to keep a single, always-fresh source of truth for campaign performance and sequence effectiveness.

Summary

Pull Smartlead campaign analytics on a schedule and write them to a Google Sheet (append or update).
Works with pagination, avoids duplicates via a stable key, and is ready for dashboards, pivots, or BI tools.

What This Workflow Does

Collects campaign stats from Smartlead (per-lead, per-sequence).
Handles pagination safely (offset/limit).
Writes to Google Sheets using appendOrUpdate with a matching column to prevent duplicates.
Can run on a schedule for near real-time analytics.

Node Structure Overview

Step	Node	Purpose
1️⃣	Schedule Trigger	Starts the workflow on a cadence (e.g., hourly)
2️⃣	Code (Pagination Generator)	Emits `{offset, limit}` pairs (e.g., 0..9900, step 100)
3️⃣	Split in Batches	Sends each pagination pair to the API sequentially
4️⃣	HTTP Request (Smartlead)	`GET /campaigns/{campaign_id}/statistics` with `offset/limit`
5️⃣	Split Out	Turns the API `data[]` array into one item per lead record
6️⃣	Google Sheets (appendOrUpdate)	Upserts rows by `stats_id` into `EngagedLeads` tab
7️⃣	Loop Back	Continues until all batches have been processed

Step-by-Step Setup

Prerequisites
- Smartlead account + API key with access to campaign statistics.
- Google account + Google Sheets OAuth connected in n8n.

Create the Google Sheet

Spreadsheet name: Email Analytics (can be anything).
Tab name: EngagedLeads.

Add these exact headers (first row):

lead_name, lead_email, lead_category,
sequence_number, stats_id,
email_subject, sent_time, open_time, click_time, reply_time,
open_count, click_count, is_unsubscribed, is_bounced

Configure the Schedule Trigger
- Choose a frequency (e.g., every 2 hours).
- If you’re testing, set a single run or a short cadence.
Configure the Code Node (Pagination)
- Emit N items like:
```
{ "offset": 0, "limit": 100 }
{ "offset": 100, "limit": 100 }
...
```
- 100 is a good default limit. For up to 10,000 records, generate 100 offsets.
Configure the Smartlead API Node
- Method: GET
- URL:
```
https://server.smartlead.ai/api/v1/campaigns/{campaign_id}/statistics
```
- Query parameters:
  - api_key = <YOUR_SMARTLEAD_API_KEY>
  - offset = {{ $json.offset }}
  - limit = {{ $json.limit }}
- Map response to JSON.
Split Out the Response
- Use a Split Out (or similar) to iterate over data[] so each lead record is one item.
Google Sheets Node (Append or Update)
- Operation: appendOrUpdate.
- Document: Your Email Analytics sheet.
- Sheet/Tab: EngagedLeads.
- Matching Column: stats_id.
- Map fields from Smartlead response to sheet columns:
  - lead_name ← lead name (or composed from first/last if provided)
  - lead_email ← email
  - lead_category ← category/type if available
  - sequence_number ← sequence step number
  - stats_id ← stable identifier (e.g., Smartlead stats_id or message id)
  - email_subject ← subject
  - sent_time, open_time, click_time, reply_time ← timestamps
  - open_count, click_count ← integers
  - is_unsubscribed, is_bounced ← booleans
- If the same stats_id arrives again, the row is updated, not appended.
Test and Activate
- Run once manually to verify API and sheet mapping.
- Check the sheet for new/updated rows.
- Activate the workflow to run automatically.

Smartlead API Reference (Used by This Workflow)

Endpoint
GET https://server.smartlead.ai/api/v1/campaigns/{campaign_id}/statistics
Required query parameters
api_key (string)
offset (number)
limit (number)
Typical response (trimmed example)

{
  "data": [
    {
      "lead_name": "Jane Doe",
      "lead_email": "[email protected]",
      "sequence_number": 2,
      "stats_id": "15b6ff3a-...-b2b9f343c2e1",
      "email_subject": "Quick intro",
      "sent_time": "2025-10-08T10:18:55.496Z",
      "open_time": "2025-10-08T10:20:10.000Z",
      "click_time": null,
      "reply_time": null,
      "open_count": 1,
      "click_count": 0,
      "is_unsubscribed": false,
      "is_bounced": false
    }
  ],
  "total": 1234
}

Google Sheets Structure (Recommended)

Spreadsheet: Email Analytics

Tab: EngagedLeads

Columns:lead_name, lead_email, lead_category,
sequence_number, stats_id,
email_subject, sent_time, open_time, click_time, reply_time,
open_count, click_count, is_unsubscribed, is_bounced

Matching Column: stats_id (prevents duplicates and allows updates)

Customization Tips

Multiple Campaigns
Duplicate the workflow and set a different {campaign_id} and/or write results to a separate tab in your Google Sheet.
Batch Size
Increase or decrease the limit value (e.g., 200) in your Code node if you want fewer or more API calls.
Filtering
Add a Code or IF node to skip rows where is_bounced = true or is_unsubscribed = true.
Dashboards
Create a new tab named Dashboard in Google Sheets and visualize your data using built-in charts or connect it to Looker Studio for advanced visualization.
Enrichment
Join this dataset with your CRM data (e.g., HubSpot or Salesforce) using lead_email as a key to gain deeper customer insights.

Security and Publishing Notes

Do not hardcode your Smartlead API key in the workflow export.
Use n8n credentials or environment variables instead.
When sharing the template publicly, replace sensitive values with placeholders like:
<YOUR_SMARTLEAD_API_KEY> and <YOUR_GOOGLE_SHEET_ID>.
Keep your Google Sheet private unless you intentionally want to share it publicly.

Troubleshooting

No rows in Sheets
Verify that the API response includes data[], confirm that the Split Out node is configured correctly, and check field mappings.
Duplicates
Ensure the Google Sheets node has its matching column set to stats_id.
Rate Limits
Increase the schedule interval, add a short Wait node between batches, or reduce the limit size.
Mapping Errors
Ensure that column names in Sheets exactly match your field mappings — they are case-sensitive.
Timezone Differences
Smartlead timestamps are in UTC. Convert them downstream if your local timezone is different.

Example Use Case

Run this workflow hourly to maintain a live, company-wide Email Engagement Sheet.

Sales teams can monitor replies and active leads.
Marketing teams can track open and click rates by sequence.
Operations can export monthly summaries — no Smartlead login required.