Turn PattersonVet.com into an API

What you can build on PattersonVet.com

• Get recent orders

  Build this

  Reads My Recent Orders under the Account button on PattersonVet.com, for the account you sign in with.

  Takes

  Placed since (optional)

  Returns

  Order number, order date, ship-to, purchase order number, order total, whether tracking is available

• Track an order

  Build this

  Opens the Track link next to one order in My Recent Orders and reads the Order and Invoice Tracking page.

  Takes

  Order number

  Returns

  Order number, invoice number, carrier, tracking number, shipment status, or Not available

• List orders waiting for your approval

  Build this

  As a bill-to, reads the orders that ship-to users placed and that stay in pending status until a bill-to approves or rejects them.

  Takes

  Nothing

  Returns

  Order number, ship-to user, order date, items, order total, days pending

• Approve or reject a pending order

  Build this

  As a bill-to, opens one ship-to order in pending status and approves or rejects it.

  Takes

  Order number, approve or reject

  Returns

  Order number, new status, confirmation message

Automate PattersonVet.com 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 shipment check for this week's orders

  Build this

  Starts

  Every weekday at 8:00

  Step 1

  Get recent orders placed in the last 7 days.

  Step 2

  For each order, read the Order and Invoice Tracking page.

  Step 3

  Keep the orders whose carrier or shipment status changed since the last run.

  Step 4

  Email you the list with order number, carrier, tracking number and status.

• Ship-to orders waiting for bill-to approval

  Build this

  Starts

  Every weekday at 9:00

  Step 1

  List the ship-to orders in pending status.

  Step 2

  Stop when there are none.

  Step 3

  Post each order, with ship-to user, items, total and days pending, to your team's webhook for review.

• Last week's orders, handed to accounting

  Build this

  Starts

  Every Monday at 7:00

  Step 1

  Get recent orders placed in the last 7 days.

  Step 2

  Keep the orders not sent on the last run.

  Step 3

  Post order number, date, ship-to, purchase order number and total to your accounting system's webhook.

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 recent orders” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "www.pattersonvet.com/get_recent_orders",
    "input": {
      "placed_since": "2026-11-05"
    }
  }'

{
  "status": "completed",
  "data": {
    "orders": [
      {
        "order_number": "W4821907",
        "order_date": "2026-11-10",
        "ship_to": "Northwind Animal Hospital, Main St",
        "purchase_order_number": "PO-1188",
        "total": 1842.35,
        "currency": "USD",
        "tracking_available": true
      }
    ],
    "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.

PattersonVet.com’s own options

Patterson documents no API, EDI or file export for practices on PattersonVet.com or its support site. What it does offer: email notices for orders that need a bill-to's approval, CSOS ordering of schedule 2 drugs through the Express222 portal, and orders by phone through your local branch.

Read on November 12, 2026: Automated Reminder Email for Pending Orders, Controlled Substance Ordering (DEA, CSOS, Express222, Legisym), Patterson Veterinary Support.

Signing in to PattersonVet.com

PattersonVet.com signs you in on a Patterson sign-in page with your email address and password, with Forgot your password? to reset it. Accounts are set up as bill-tos and ship-tos. With Fous you sign in once through that page with your own account: the login is sealed with AES-256, and an expired session is signed back in.

Worth knowing

Ship-to orders can wait for a bill-to

When a ship-to places an order that needs approval, it stays in pending status until a bill-to approves or rejects it. Reminders go out every 7 days only if the bill-to turned on the notification.

Tracking is not always there yet

The Order and Invoice Tracking page shows Not available - try again later while tracking is still syncing. Some carriers share no tracking; Patterson lists UPS, FedEx, GLS and Blue Streak among those that do.

Schedule 2 drugs go through Express222

CII orders are placed in Legisym's Express222 portal with a DEA signing certificate and a separate login, not in the PattersonVet.com cart. Shipments go only to the address on the DEA certificate.

Checks at checkout

An order with Hazmat items cannot ship next day air, so air items need a separate order. If your profile requires a purchase order, the site will not take the order without one.

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