Get your WAWF invoice statuses through an API

What you can build on WAWF

• Check document status by contract

  Build this

  Searches the Document History Folder by contract number and CAGE code and reads each document's type and status, from Submitted to Paid.

  Takes

  Contract number, CAGE code (optional), Pay Official DoDAAC (optional)

  Returns

  Contract number, invoice or shipment number, document type, status, Pay Official DoDAAC

• Get payment details for a paid invoice

  Build this

  Opens the Paid status link on an invoice found in the Document History Folder and reads the payment details.

  Takes

  Contract number, invoice number

  Returns

  Disbursing station, voucher number, payment date, amount, EFT trace or check number

• List rejected invoices and receiving reports

  Build this

  Reads the Rejected Invoices Folder and the Rejected Receiving Reports Folder in the Vendor working folders.

  Takes

  CAGE code (optional)

  Returns

  Folder, contract number, invoice or shipment number, document type, Pay Official DoDAAC

• Correct and resubmit a rejected invoice

  Build this

  Opens a document in the Rejected Invoices Folder, changes only the data elements you give and resubmits it.

  Takes

  Contract number, invoice number, corrected fields and values

  Returns

  Contract number, invoice number, status

Automate WAWF 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.

• New rejected invoices and receiving reports

  Build this

  Starts

  Every weekday at 7:00

  Step 1

  List the documents in the Rejected Invoices and Rejected Receiving Reports folders.

  Step 2

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

  Step 3

  Email you each one with its contract number, invoice or shipment number and document type.

• Paid invoices, handed to accounting

  Build this

  Starts

  Every weekday at 17:00

  Step 1

  For each contract you name, check the status of its documents in the Document History Folder.

  Step 2

  Keep the invoices that changed to Paid since the last run.

  Step 3

  Get the payment details of each and post them to your accounting system's webhook.

• Weekly report of unpaid WAWF invoices by status

  Build this

  Starts

  Every Monday at 8:00

  Step 1

  For each contract you name, check the status of its invoices.

  Step 2

  Keep the invoices that are not Paid or Void.

  Step 3

  Group them by status, from Submitted to Processed, and email you the report.

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 “Check document status by contract” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "piee.eb.mil/check_document_status",
    "input": {
      "contract_number": "W00000-25-C-0117",
      "cage_code": "1ABC2"
    }
  }'

{
  "status": "completed",
  "data": {
    "contract_number": "W00000-25-C-0117",
    "cage_code": "1ABC2",
    "documents": [
      {
        "invoice_number": "ACME0042",
        "shipment_number": "ACME042",
        "document_type": "Invoice and Receiving Report (Combo)",
        "status": "Paid",
        "pay_official_dodaac": "HQ0000"
      }
    ],
    "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.

WAWF’s own options

WAWF takes vendor documents three ways: web entry, EDI and SFTP flat files. EDI and SFTP are for sending invoices and receiving reports in volume, and are set up and tested with the PIEE Help Desk and the Joint Interoperability Test Center. PIEE documents no web API for vendors: statuses and payment details are read on screen in WAWF, and myInvoice sends Advice of Payment notifications on request.

Read on November 12, 2026: PIEE vendor getting started, WAWF EDI guides, WAWF Vendor role training.

Signing in to WAWF

PIEE signs vendors in with a user ID and password and a second step by email or an authenticator app; certificates are optional for vendors and skip that step. Sessions end after 30 minutes idle. With Fous you sign in once through PIEE's own sign-in with your own account: the login is sealed with AES-256, the second step is handled when PIEE sends it by email, and an expired session is signed back in.

Worth knowing

Log in within 34 days

PIEE deactivates users who have not logged in within 34 days, and a session expires after 30 minutes of inactivity.

One login per person, roles from your CAM

PIEE logins are individual and should not be shared. Every vendor group needs a Contractor Administrator (CAM), who activates the Vendor role for each person under your CAGE code.

An invoice is voided only after a rejection

You can void an invoice only after the LPO or Payment Official rejects it, and never once an EDI transaction was sent. Otherwise you ask the next step in the workflow to reject it back.

Saved drafts last 7 days

Documents in the Saved Documents Folder are kept for 7 days, or 30 days for DLA Energy documents.

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