Get your 3PL Warehouse Manager stock through an API

What you can build on 3PL Warehouse Manager

• Get the Stock Status report

  Build this

  Runs Reports > Stock Status for your customer and warehouse, as of an end date, and reads each SKU's OnHand, Allocated, Quarantined and Available.

  Takes

  Warehouse, end date (optional), SKU (optional), include zero OnHand (optional)

  Returns

  SKU, qualifier, description, OnHand, allocated, quarantined, available, UOM, reorder category

• Find orders and their status

  Build this

  Searches Orders > Find Orders and reads each order's reference number and status: Open, Complete, Closed or Canceled.

  Takes

  Warehouse, status (optional), created since (optional)

  Returns

  Transaction ID, reference number, status, warehouse, created date, ship to name, carrier

• Read lots and expiration dates

  Build this

  Filters Inventory > Manage Inventory by SKU and track-bys and reads each receive item's lot, expiration date and quantity.

  Takes

  Warehouse, SKU (optional), expires before (optional)

  Returns

  SKU, qualifier, lot, expiration date, quantity, on hold, receipt transaction ID

• Create an order

  Build this

  Opens Orders > Create Orders, sets the warehouse and a unique Reference Number, then enters the contact, line items and carrier and saves the order.

  Takes

  Warehouse, reference number, ship to contact and address, SKUs and quantities, carrier and service

  Returns

  Transaction ID, reference number, status, line items

Automate 3PL Warehouse Manager with a workflow

A workflow runs your methods as one process, with nobody at the screen. A schedule or a call from your own system starts it, the steps run in order, and the result arrives in your inbox or in the systems you already use.

• Morning stock check against your reorder points

  Build this

  Starts

  Every weekday at 7:00

  Step 1

  For each warehouse you name, get the Stock Status report as of today, including SKUs with zero OnHand.

  Step 2

  Keep the SKUs whose Available is below the minimum you set for each.

  Step 3

  Email you the list with SKU, description, OnHand, Allocated and Available.

• Closed orders handed to your ERP

  Build this

  Starts

  Every day at 19:00

  Step 1

  Find the orders with status Closed in each warehouse.

  Step 2

  Keep the orders that were not Closed on the last run, and stop when there are none.

  Step 3

  Post transaction ID, reference number, ship to name and carrier to your ERP webhook.

• Weekly list of lots close to expiry

  Build this

  Starts

  Every Monday at 8:00

  Step 1

  Read lots and expiration dates in Manage Inventory for each warehouse.

  Step 2

  Keep the rows that expire within the next 60 days.

  Step 3

  Email you the rows with SKU, lot, expiration date and quantity, soonest first.

You can run a workflow by hand on every plan, Free included. Schedules and webhook triggers come with the paid plans, from $29 a month.

Once built, one call from your code

Once you have built a method, it is one POST to /v1/runs from your backend, or a tool an AI agent calls over MCP. This is what “Get the Stock Status report” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "app.extensiv.com/get_stock_status",
    "input": {
      "warehouse": "Northwind Logistics, Reno",
      "end_date": "2026-11-12"
    }
  }'

{
  "status": "completed",
  "data": {
    "customer": "Acme Outdoor",
    "warehouse": "Northwind Logistics, Reno",
    "end_date": "2026-11-12",
    "items": [
      {
        "sku": "TENT-2P-GRN",
        "qualifier": null,
        "description": "Two-person tent, green",
        "on_hand": 412,
        "allocated": 96,
        "quarantined": 0,
        "available": 316,
        "uom": "Each",
        "reorder_category": null
      }
    ],
    "count": 1
  }
}

An example with invented data, not a ready-made endpoint. The method exists in your organization once you build it, and its name, inputs and fields follow your request.

3PL Warehouse Manager’s own options

3PL Warehouse Manager has a REST API for orders and inventory, but your warehouse provisions the keys: it creates a user for the connection and generates a Client ID and Client Secret in Extensiv's Support Portal. Direct developer support needs a Developer Enablement package. EDI and API integrations are set up with Extensiv's Professional Services.

Read on November 12, 2026: Getting started with credential management, Providing REST API access, Creating orders.

Signing in to 3PL Warehouse Manager

You sign in at app.extensiv.com, Extensiv Hub's single sign-on for its products, with your email address and password, then open 3PL Warehouse Manager. Your warehouse creates your user and assigns it to your customer. With Fous you sign in once through that same sign-in with your own account: the login is sealed with AES-256, and an expired session is signed back in.

Worth knowing

Your warehouse sets what you can see

A customer user sees the pages its Role and Classic View Access allow, both set by the warehouse. If a page such as Stock Status is missing, ask your warehouse to add the permission.

Orders stay editable only while Open

Customer users can edit an order only while it is Open. Once the warehouse marks it Complete it cannot go back to Open, and a Canceled order is removed for good.

Stock Status hides zero stock by default

The report shows active SKUs with OnHand inventory unless you pick Show All or Show Inactive. A method that compares runs should ask for Show All, or a SKU that sells out drops off the list.

One user can cover several customers

A customer user assigned to more than one customer forms a customer group. Methods then take the customer as an input, as well as the warehouse.

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