How to Integrate with a 3PL: A Practical Guide for Operations Teams

Third-party logistics (3PL) providers can unlock serious efficiencies in warehousing, shipping, and fulfillment, but only if your systems are connected. Integrating with a 3PL means automating how orders, inventory, and delivery data move between your internal systems and theirs.

This post walks through the key ways to integrate with a 3PL, what methods work best, and what you need to know to get started.

What Does It Mean to Integrate with a 3PL?

Integrating with a 3PL means your business systems (like an ERP, WMS, or eCommerce platform) can exchange real-time data with your logistics provider. This data includes:

• Inbound and outbound order information

• Inventory levels and availability

• Proof of delivery (POD) and shipment tracking

• ASN (advanced shipping notice) files

• Returns and RMAs

  
  

Without integration, this exchange usually happens manually via email, spreadsheets, or customer portals, slowing things down and increasing the risk of errors.

Common Integration Methods

1. EDI (Electronic Data Interchange)

   • Traditional method used by large 3PLs

   • Standardized file formats (e.g. 850, 940, 945)

   • Great for established workflows, but setup can be complex

2. API Integrations

   • Real-time data exchange

   • Often preferred by modern logistics providers

   • Flexible and easier to manage than EDI, especially for eCommerce

3. CSV or XML File Transfers

   • Lightweight and simple

   • Usually scheduled daily or hourly via FTP/email

   • May still require manual work or middleware

4. iPaaS or Middleware Solutions

   • Centralized platforms (like Switchboard) that translate and route data between systems

   • Fast to deploy

   • Ideal if you work with multiple 3PLs or trading partners

   
   
   
   

Key Benefits of 3PL Integration

• Faster Order Processing: Orders are sent instantly, reducing delays.

• Accurate Inventory: Real-time stock levels help avoid overselling.

• Fewer Errors: No more copy-pasting or manual uploads.

• Improved Visibility: Track orders and deliveries without logging into 3PL portals.

• Better Collaboration: Strengthen supplier and logistics relationships.

Getting Started with Integration

1. Map Your Data Flows

   • What systems are involved? (ERP, WMS, eComm)

   • What documents need to be exchanged?

2. Choose the Right Method

   • If your 3PL already supports EDI or APIs, ask for their specs.

   • For simpler needs, start with CSV or a middleware provider.

3. Work with an Integration Partner

   • Solutions like Switchboard handle the heavy lifting.

   • No need for custom code or lengthy IT projects.

4. Test and Launch

   • Validate file formats and responses.

   • Monitor the first few transactions closely.

   
   
   
   

Integrating with a 3PL isn’t just a tech upgrade, it’s a business advantage. The smoother your data flows, the faster your supply chain moves. Whether you're shipping B2B orders or managing eCommerce fulfillment, a solid 3PL integration lays the groundwork for scale.

If you're ready to cut down on manual steps and improve logistics performance, now's the time to integrate.