Trade with Mercer Transport – Fast, Easy, Scalable EDI Integration

Most suppliers are fully connected and processing live Mercer Transport EDI transactions within 3–5 business days. Stacksync's no-code setup means you don't need developers or EDI consultants — configure your field mappings through our visual interface, run a test cycle, and go live.

A Mercer Transport EDI 204 is an electronic request from a shipper or broker to a carrier to transport a load. It contains the pickup and delivery locations, commodity descriptions, weight, equipment requirements, and requested dates. Mercer Transport sends 204s to carriers in their network to tender freight for acceptance. The carrier responds with a 990 (Response to a Load Tender) to accept or decline. Stacksync processes Mercer Transport 204 tenders automatically, extracting shipment details and routing them to your TMS or dispatch system for immediate action by your operations team.

Carriers respond to a Mercer Transport 204 Load Tender with an EDI 990 (Response to a Load Tender). The 990 includes an acceptance or rejection code — carriers can accept the load as tendered, accept with modifications, or decline. Mercer Transport typically expects a 990 response within a specific timeframe (often 30 minutes to 2 hours). Failure to respond may result in the load being retendered to another carrier. Stacksync automates 990 responses based on your fleet capacity and dispatch rules, ensuring timely acceptance of profitable loads and automatic declination when capacity is full.

No. Stacksync handles the entire EDI transport layer. We connect directly to Mercer Transport's trading partner network through our certified connections. You don't need to manage a separate VAN subscription, AS2 certificates, or SFTP configurations.

A SCAC (Standard Carrier Alpha Code) is a unique 2-to-4 letter identifier assigned by the National Motor Freight Traffic Association (NMFTA) to transportation carriers. Mercer Transport uses SCAC codes in EDI 204 tenders to identify the carrier being tendered the load, and carriers must include their SCAC in the 990 response and subsequent status updates (214). Without a valid SCAC, Mercer Transport's system cannot route the tender or track the shipment. Stacksync stores your SCAC code and automatically includes it in all outbound EDI documents, ensuring proper carrier identification across all Mercer Transport transactions.

Stacksync improves compliance scores by eliminating manual processing delays. Purchase Orders sync to your system in real time, ASNs are generated automatically when you ship, and invoices are validated with three-way matching before submission. Real-time monitoring alerts you to issues before they become chargebacks.

Yes, Mercer Transport EDI 204 supports multi-stop shipments through multiple S5 (Stop Off Details) segments. Each stop includes the facility address, stop type (pickup or delivery), scheduled date and time window, and the specific freight being handled at that location. The stops are sequenced to define the route order. Stacksync maps multi-stop Mercer Transport 204 tenders into your TMS routing system, creating individual stop records with proper sequencing so your dispatch team sees the complete route plan without manually parsing the EDI document.

Stacksync supports all EDI document types required by Mercer Transport — including Purchase Orders (850), Invoices (810), ASNs (856), PO Acknowledgments (855), and more. Our platform handles the full lifecycle from order to payment automatically.

Stacksync connects to your TMS or dispatch system and processes incoming Mercer Transport 204 tenders in real time. When a tender arrives, Stacksync extracts the shipment details — origin, destination, commodity, weight, equipment type, and pickup/delivery windows — and creates a load record in your system. Based on your capacity rules and lane preferences, Stacksync can auto-accept loads with a 990 response or route them to your dispatch queue for manual review. The platform tracks tender acceptance rates and response times to help you maintain preferred carrier status with Mercer Transport.

Yes. Stacksync integrates with any system that has a database or API — including SAP, Oracle, NetSuite, Microsoft Dynamics, and custom-built ERPs. Data flows bidirectionally between Mercer Transport's EDI network and your system in real time.

Stacksync monitors Mercer Transport's EDI spec changes and updates our mappings proactively. When a change affects your integration, we notify you and apply updates — so you stay compliant without scrambling to decode new implementation guides.