Updated 5/12/26
Third-party logistics (3PL) is practice of moving logistics and supply chain management from in-house to a third-party provider. This model has become the new normal for many businesses of all shapes and sizes in the post-pandemic economy—providing better opportunities to grow and find more efficient ways to deliver their products.
Like outsourcing EDI to a cloud-based EDI services provider, outsourcing logistics to a skilled 3PL eliminates manual work. But 3PL and EDI aren’t just alike. They’re inseparable; having a great EDI solution to manage your 3PL EDI transactions is the key to maximizing operational efficiency.
Table of Contents
- Why Business are Turning to 3PL
- How 3PL and EDI Documents Work
- Routing 3PL EDI Transactions to Your Internal Systems
- Nine Questions to Ask a Potential 3PL Vendor
Why Businesses Are Turning to 3PL
How 3PL and EDI Documents Work
Today, business systems like ERP and WMS are tightly integrated with 3PLs to support the seamless data exchange of business documents. This includes purchase orders, shipment advice confirmations, receipt of goods, and warehouse inventory adjustment advice to support warranty returns and synchronizations.
Often these transactions are done in XML with web services, other times with traditional X12 or EDIFACT EDI, and even the transfer of spreadsheets and .csv comma delimited text files. Moreover, international transactions take on added complexity with VAT (value-added taxes) and additional data required.
Keeping a competitive edge with a 3PL on your side doesn’t happen overnight, though. The EDI standards we all know and love, regardless of which specific format is employed, are the bridge that makes everything happen. The suppliers know their business well, and the 3PLs are masters at what they do—but it is the EDI process that acts as the master communicator, allowing them to tango together in perfect rhythm.
A Deep Dive Into 3PL and EDI Transactions
3PL communications can be handled through traditional VAN connections, AS2, secure FTP, APIs, or cloud-based managed integration services. Outside of the common EDI 940 Warehouse Shipping Order, EDI 945 Warehouse Shipping Advice, and EDI 856 Advance Ship Notice, businesses may also exchange documents such as the EDI 943 Warehouse Stock Transfer Shipment Advice, EDI 944 Warehouse Stock Transfer Receipt Advice, EDI 214 Transportation Carrier Shipment Status, EDI 300 series ocean container transactions, EDI 100 series air freight documents, and EDI 400 series rail-related transactions.
A modern managed EDI service like GraceBlood’s VelociLink™ helps organizations automate and orchestrate these transactions across suppliers, warehouses, carriers, ERP systems, and e-commerce platforms without requiring businesses to manage the infrastructure internally.
A few examples of what businesses can accomplish with 3PL EDI integration include:
- Automatically routing inbound freight invoices directly into accounts payable workflows, reducing manual data entry and improving invoice accuracy.
- Posting freight charges directly to customer order invoices for more accurate B2C billing and fulfillment reporting.
- Configuring EDI 214 shipment status updates to feed customer portals, websites, or customer service systems with near real-time tracking information.
- Connecting carriers, warehouses, and internal business systems through API-enabled integration services to provide accurate shipment visibility at every stage of the supply chain.
- Synchronizing inventory updates between 3PL warehouses, ERP systems, and e-commerce storefronts to reduce stock discrepancies and improve order fulfillment accuracy.
By combining 3PL operations with managed EDI integration services, businesses can create a more connected, automated, and scalable supply chain ecosystem. This not only improves operational efficiency and data visibility, but also helps organizations respond faster to customer demands and uncover new opportunities for growth across the supply chain.
Routing 3PL EDI Transactions to Your Internal Systems
For 3PL EDI integration to deliver real operational efficiency, transactions must do more than simply move between trading partners. They also need to flow directly into your internal business systems so inventory, orders, fulfillment, and customer communications stay synchronized in real time.
ERP Connectivity
One of the most important aspects of 3PL EDI automation is connecting warehouse transactions directly to your ERP system. When documents like the EDI 940 Warehouse Shipping Order, EDI 945 Warehouse Shipping Advice, and EDI 856 Advance Ship Notice are automatically routed into platforms such as SAP, NetSuite, Microsoft Dynamics, or Oracle, businesses can eliminate manual data entry and reduce delays between fulfillment and financial reporting.
This connectivity ensures inventory counts, sales orders, shipping confirmations, and accounting records update automatically as warehouse activity occurs. Instead of relying on spreadsheets or manual reconciliation, businesses gain real-time visibility into inventory levels, order status, and fulfillment performance across the supply chain.
E-Commerce Storefront Syncing
Modern supply chains also depend heavily on seamless connectivity between 3PL providers and e-commerce platforms. As direct-to-consumer sales continue to grow, businesses need web orders from storefronts like Shopify, Magento, BigCommerce, or WooCommerce to flow directly to their warehouse and fulfillment systems without manual intervention.
By routing 3PL EDI transactions through integrated e-commerce workflows, businesses can automate order fulfillment, shipment tracking updates, inventory synchronization, and customer notifications. This helps prevent overselling, reduces fulfillment delays, and improves the overall customer experience by ensuring online shoppers always have accurate order and shipping information.
EDI vs. API Connections
While traditional EDI remains the backbone of standardized B2B communication, many modern 3PL environments now require a hybrid integration approach. EDI continues to excel at handling high-volume, structured business transactions between suppliers, retailers, carriers, and warehouses. However, APIs are increasingly used to support real-time connectivity for web stores, shipment tracking, and customer-facing applications.
For example, a business may use EDI transactions for bulk warehouse orders and shipment confirmations while simultaneously using APIs to provide instant tracking updates on its website or synchronize inventory availability across online marketplaces. Combining EDI and API technologies allows organizations to balance reliability, scalability, and real-time responsiveness throughout their supply chain operations.
Nine Questions to Ask a Potential 3PL Vendor
Like choosing an EDI managed service provider, choosing a 3PL vendor is crucial. From the costs of their services to the impact of the data flow to and from your existing systems and out to your customers, you have to think about how a prospective vendor will fit in with your business operations to provide a flexible solution that fits your company like a glove, instead of an out-of-the-box solution that puts you in a box.
Before committing to a contract, you must ensure that the functionality you seek to automate your processes is operationally, economically, and technically feasible. Also, evaluate a few alternatives so you can compare different 3PLs to each other. Don’t choose the least expensive option just because it’s cheaper, but rather based on your comparison of features and your priorities.
Ask these nine questions to ensure you’re choosing the right 3PL vendor for you:
1. How long has the 3PL been in business?
The longer they have been in business, the more experience they will have to support your order fulfillment and EDI functionality.
2. Will they allow you to tour their facility?
Tours can be a valuable way of watching the facility in action to see if any improvements are required.
3. How are their support personnel to work with?
What are their support hours? Will you have a dedicated customer service rep, or will you need to call a call center?
4. Do they have any client references that you could speak with?
Interviewing current clientele will allow you to discuss their relationship with the 3PL and gauge how effective they are.
5. What customers have they worked with before regarding shipping container requirements for GS1-128 labels (formerly UCC-128)?
Ask if they can easily accommodate your customer label requirements as the orders are shipped directly to your trading partners. If so, that’s one less thing you need to maintain.
6. Are they an EDI-capable 3PL vendor, and to what extent?
Not all 3PLs utilize the standard EDI 940 Warehouse Shipping Order and send EDI shipping information to their clients. Some 3PLs, for example, use customized versions of an EDI Purchase Order 850 and EDI ASN 856 to handle their receipt of orders for shipment and shipping information and 861 Inventory Adjustment transactions to handle inventory adjustments as required.
In these cases, limited EDI capabilities often lead to designing and programming customized interfaces to a client’s enterprise resource planning (ERP) system. Creating a customized interface can be costly if not adequately researched by EDI experts to meet the requirements of older-generation logistics companies.
The two essential questions you need your potential vendor to answer to demonstrate their expertise in EDI-capable 3PL are:
- What EDI transactions do they support?
- Can they send shipping data directly to your trading partner community through customer ASNs (EDI 856)?
7. Do they utilize a VAN or FTP, are they AS2 capable, or do they support API integrations?
Some 3PLs are more technologically advanced than others. More modern 3PLs can support a wider range of modern communication protocols, including AS2, SFTP, and real-time API integrations. While traditional EDI communication methods remain critical for standardized document exchange, APIs are increasingly important for supporting real-time inventory synchronization, shipment tracking, e-commerce connectivity, and customer-facing applications.
A 3PL provider with flexible integration capabilities can more easily connect with your ERP, WMS, e-commerce storefronts, and carrier systems. This helps your business maintain faster and more accurate data flows throughout the supply chain. Providers limited to older FTP-only functionality may require additional customization or manual processes that reduce visibility and operational efficiency.
8. What accommodations do they have for the frequency of data transmissions?
3PLs need to be able to provide carrier information in real-time so that ASNs can be built from shipment data. These required transactions can quickly be sent to your trading partners to maintain compliance.
9. Do they have a test system to test transactions prior to implementation and maintenance going forward?
Using a test system vs. a production system allows transactions to be tested without impacting the process flow in the production environment.
While 3PLs offer a variety of services, evaluate them very carefully to ensure your business requirements will be met. And keep in mind the additional costs of going in this direction and handling the data flow.
When you ask these questions, you can be certain whether or not the vendor you’re looking for is capable of meeting the standards you need to make the most of 3PL EDI integration.
Businesses Need Intelligent Logistics Ecosystems
As supply chains continue to evolve, businesses need more than just warehouse space and shipping support to remain competitive. They need connected, intelligent logistics ecosystems that can move information as efficiently as products. That’s why 3PL providers and EDI integration solutions have become such a critical part of modern supply chain strategy.
From automating EDI 940 warehouse orders and EDI 945 shipping confirmations to synchronizing ERP systems, e-commerce storefronts, carrier updates, and customer communications, effective 3PL EDI integration helps organizations eliminate manual processes, improve data accuracy, and gain greater visibility across their operations.
However, not all 3PL providers offer the same level of integration capability, scalability, or technology support. Evaluating a provider’s EDI experience, communication methods, API capabilities, testing processes, and ability to connect with your internal systems is essential to building a reliable and future-ready supply chain.
With the right 3PL partner and a modern managed integration platform like GraceBlood’s VelociLink™, businesses can streamline fulfillment operations, improve customer satisfaction, support omnichannel growth, and create a more agile supply chain prepared for future demands.
Reach out to one of our experts for a free assessment to see how you can leverage 3PL EDI documents.
