Get your Airgas invoices and cylinder balances by API

What you can build on Airgas.com

• Get open invoices

  Build this

  Reads Open Invoices under Invoices for the account you pick, with each invoice's dates, amount and payment status.

  Takes

  Account (optional)

  Returns

  Account, invoice number, invoice date, due date, amount, payment status

• Get cylinder balances

  Build this

  Reads the cylinder balance for the account you pick: how many cylinders of each kind you hold.

  Takes

  Account (optional)

  Returns

  Account, cylinder type, gas, cylinder description, cylinders held

• Check order status

  Build this

  Reads Order History for the account you pick, with each order's status and tracking.

  Takes

  Account (optional), ordered since (optional)

  Returns

  Order number, order date, PO number, status, items, tracking

• Reorder from order history

  Build this

  Opens a past order in Order History, creates a new order from it, sets the quantities and places it with your PO number.

  Takes

  Account, past order number, quantities, PO number

  Returns

  Order number, status, items, total

Automate Airgas.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.

• Open invoices to accounts payable, every account

  Build this

  Starts

  Every Monday at 7:00

  Step 1

  For each account on your login, get the open invoices.

  Step 2

  Keep the invoices that were not there on the last run.

  Step 3

  Post each one with account, invoice number, due date and amount to your ERP webhook.

• Monthly cylinder balance check

  Build this

  Starts

  On the 1st of every month at 8:00

  Step 1

  For each account, get the cylinder balances.

  Step 2

  Keep the cylinder types whose count changed since the last run.

  Step 3

  Email you the changes, one section per account.

• Order status changes, each morning

  Build this

  Starts

  Every weekday at 7:30

  Step 1

  For each account, check order status for orders placed in the last 30 days.

  Step 2

  Keep the orders whose status changed since the last run.

  Step 3

  Email you order number, PO number, new status and tracking.

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 open invoices” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "www.airgas.com/get_open_invoices",
    "input": {
      "account": "4410072"
    }
  }'

{
  "status": "completed",
  "data": {
    "account": "4410072",
    "account_name": "Acme Fabrication, Plant 2",
    "invoices": [
      {
        "invoice_number": "9871204455",
        "invoice_date": "2026-10-31",
        "due_date": "2026-11-30",
        "amount": 1842.65,
        "currency": "USD",
        "payment_status": "Open"
      }
    ],
    "count": 1,
    "total_open": 2159.05
  }
}

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.

Airgas.com’s own options

Airgas connects to customers' procurement systems through its eBusiness Solutions team: punchout through Airgas SupplySync, hosted catalogs, and orders, confirmations, ship notices and invoices by cXML or EDI. Its pages describe no developer API for your account data. Invoices, cylinder balances, order history and delivery receipts are on Airgas.com.

Read on November 12, 2026: Airgas eBusiness Solutions, Airgas Online Bill Pay, Airgas Digital PODs.

Signing in to Airgas.com

Airgas.com signs you in with your email address and a password. It can remember your username, but asks for the password on each visit. With Fous you sign in once through Airgas.com's own sign-in with your own account: the login is sealed with AES-256, code and AI agents never see it, and an expired session is signed back in.

Worth knowing

Several accounts under one login

Airgas.com can group several business accounts under a single login, and you switch between them with Switch Account. Build each method to take the account as an input, so a workflow can loop over all of them.

PODs appear within 24 hours

Once you are enrolled, digital proof of delivery receipts show in your account within 24 hours. Bulk, MicroBulk, tube trailer, shipping and common carrier deliveries are excluded.

Autopay timing depends on how you pay

With a bank account, autopay drafts on the invoice due date. With a card, it drafts when the invoice is generated. Since September 15, 2025, credit card payments on open invoices carry a 3% surcharge for customers with extended credit.

Requisitions can hold an order for approval

Airgas.com lets you set up buyers with purchase limits and approvers who approve or reject purchases. A reorder placed by such a buyer follows the same rules.

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