Our 7S Shipping Label Service simplifies the onboarding and ongoing use of last-mile carriers by managing the integration, maintenance, and future extensions in the background for you. As a merchant, you only need to connect once to our standardized API to gain access to all available carriers within Seven Senders, without repeating integrations for each additional carrier. With more than 70 carriers integrated, support for over 1,500 carrier services, and the capacity to process more than 100,000 shipping labels per day, the service is built to scale. For our EDI carriers we maintain an average API response time of 220 ms and an uptime of 99.95 percent, ensuring reliable and high-performance operations.

Successful carrier integrations are measured not only by quantity, but by quality, including performance, reliability, and operational support. Warehouse processes are often only as efficient as the system generating the shipping labels. At Seven Senders, we collaborate closely with each carrier to assess their technical capabilities against real world requirements. Based on this evaluation, we select the most suitable integration method, either EDI (offline) or API-based connections, to ensure a fast & stable implementation that fully supports your warehouse operations.

Below you will find an overview of key features & attributes designed to support shipping label generation at scale.

📖 Carrier & Service Library

🧩 Shipping Label Extension

📦 Intelligent Carrier & Service Allocation

📍PUDO Location Fall Back

⚠️ Unified Error Messaging

⚙️ Relibaility & Scalability

🏎️ Performance

We work closely with each carrier to evaluate their technical capabilities and select the optimal integration method. Whether through EDI (offline) or API connections, our focus is always on delivering a fast, reliable setup, because we understand how critical the shipping label creation process is for downstream warehouse operations.

To illustrate our performance, below is the combined label generation speed that we achieved with our top 10 in-house EDI carrier integrations during the week of Black Friday and Cyber Monday. If you need more details about our carrier integration setup, please don’t hesitate to reach out to us.

⭐ Testimonials