Unisender Integration: Subscription, Triggers, Synchronization

Your subscription form fails to send data to Unisender? Contacts duplicate on every registration? This is typical without proper integration. Errors in API requests, incorrect double opt-in settings, or missing server response handling lead to lost leads. We solve these tasks in 1 business day using the official REST API Unisender. Unisender is a Russian email marketing service with a simple API and high deliverability (up to 98% according to the service). It's suitable for transactional emails (order confirmations, password resets) and bulk campaigns. With our integration, you automate subscriptions, synchronization, and email campaigns without headaches. Over 30 projects completed.

How We Integrate Unisender in 1 Day

Connection starts with creating an API key in the Unisender account. We embed a subscribe call into your registration or order form. Example in PHP (Laravel):

$response = Http::post('https://api.unisender.com/ru/api/subscribe', [ 'format' => 'json', 'api_key' => env('UNISENDER_KEY'), 'list_ids' => env('UNISENDER_LIST_ID'), 'fields[email]' => $email, 'fields[Name]' => $name, 'double_optin' => 3, // 3 = без подтверждения, 4 = с подтверждением 'overwrite' => 1 ]); 

For transactional emails, we use the sendEmail method. We configure templates with dynamic variables. It's important to handle errors: for example, a timeout or invalid API key can break the chain. In one project, we found that 5% of emails failed during bulk sends due to an invalid API key — fixed by adding response code checks.

How Double Opt-In Works

Double opt-in is a standard subscription confirmation mechanism. With double_optin=4, Unisender sends a confirmation email with a link. Only after clicking does the contact enter the list. This eliminates spam complaints and improves deliverability. We customize the confirmation email template with your branding. In one case, this reduced unsubscribes by 30%.

Why Unisender Is Better Than Foreign Services

Unisender wins on price and no blocking, while functionality matches. Email automation with Unisender reduces manual effort.

What’s Included in the Work

• Subscription form setup (AJAX request with validation).
• Import of existing contact list (duplicate cleaning, validity checks). For a list of 10,000 contacts, import takes less than 5 minutes.
• Trigger sequences setup (welcome, cart abandonment, order confirmation). We segment by behavior: e.g., send promo emails on repeat visits.
• API documentation and employee training.
• 30-day integration warranty.

What Data We Sync

We transfer email, name, phone, and custom fields (city, interests, registration date). Data is secured via API key and HTTPS. During import, we automatically exclude invalid emails (regex check) and merge duplicates by email. In one project, this reduced the list by 15%, boosting deliverability.

Process of Work

1. Analysis: study your form, list, and email requirements.
2. Design: select API methods, data transfer scheme.
3. Implementation: write code on Laravel, test locally.
4. Testing: verify subscriptions, sync, triggers.
5. Deployment: upload to production server, train administrator.

Typical Integration Mistakes

• Invalid API key: ensure the key is active and has write permissions.
• Missing error handling: always check response code and log failed requests.
• Duplicate contacts: use overwrite=1 to update existing records.
• Timeouts during bulk import: split import into batches of 1000 contacts.

How We Guarantee Quality

We have extensive experience integrating Unisender, with over 30 completed projects. We provide a work warranty and post-delivery support. All data is encrypted using HTTPS.

Order integration — we will assess your project for free. Get a consultation from an engineer on Unisender setup.