# Get your Mercedes-Benz invoice status through an API

> Build methods that read open invoices, payment blocks and payment advices in the Financial Vendor Portal and the open documents on your proQ tiles. A workflow can check each legal entity for new payment blocks before your receivables team starts work.

Page: https://fous.com/automate/mercedes-benz-supplier-portal
Updated: 2026-11-12

Works with your own Mercedes-Benz Supplier Portal account. Fous is an independent product.

## What you can build on the Supplier Portal

### Get open invoices for a legal entity

Reads the open invoices under Display Invoice Status in the Financial Vendor Portal for the legal entity you pick, optionally only those with a payment block.

- Takes: Legal entity, payment block only (optional), document date (optional)
- Returns: Your invoice number, internal document number, document date, amount, currency, payment block

### List payment advices for a date range

Reads the Payment Advices list in the Financial Vendor Portal for one legal entity and the dates you give.

- Takes: Legal entity, from date, to date
- Returns: Payment advice, date, the details the list shows

### Count open proQ documents

Reads the number of outstanding documents shown on the proQ tiles: proCure with eAccept, proFrame with eAccept and proSource.

- Takes: Nothing
- Returns: Tile name, number of outstanding documents

### Send a Request for Invoice Status

Opens Docs/Inquiry on an invoice line under Display Invoice Status, chooses Enquiry and sends your question to the Front Office AP Department.

- Takes: Legal entity, your invoice number, message
- Returns: Invoice number, request sent, sent at

## Automate the Supplier Portal with a workflow

A [workflow](/product/workflows) 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.

### Invoices with a payment block, every legal entity

Starts: Every weekday at 7:00

1. For each legal entity you name, get the open invoices with the Payment Block filter on.
2. Keep the blocked invoices that were not there on the last run.
3. Email you the list, one section per legal entity.

### Weekly payment advices for accounting

Starts: Every Monday at 8:00

1. For each legal entity, list the payment advices dated in the past 7 days.
2. Stop when there are none.
3. Post the legal entity and each payment advice's date and details to your accounting system's webhook.

### Morning check of open proQ documents

Starts: Every weekday at 8:30

1. Count the outstanding documents on the proCure, proFrame and proSource tiles.
2. Stop when every count is zero.
3. Email you the counts per tile.

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](/product/methods), 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 for a legal entity” would look like.

Example request:

```
curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "supplier.mercedes-benz.com/get_open_invoices",
    "input": {
      "legal_entity": "Mercedes-Benz AG",
      "payment_block_only": false
    }
  }'
```

Example response:

```
{
  "status": "completed",
  "data": {
    "legal_entity": "Mercedes-Benz AG",
    "invoices": [
      {
        "invoice_number": "ACME-2026-1187",
        "internal_document_number": "5105512093",
        "document_date": "2026-10-28",
        "amount": 18420.5,
        "currency": "EUR",
        "payment_block": false
      }
    ],
    "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.

## The Supplier Portal’s own options

Mercedes-Benz asks for invoices electronically: by self-billing, EDI in VDA 4398, or PDF and structured formats through Basware. Invoice status, payment advices and master data are in the Financial Vendor Portal, a free self-service application inside the Supplier Portal, and purchasing documents come through proQ. Its supplier pages describe no API for reading these screens.

| Option | What it covers | What it takes |
| --- | --- | --- |
| EDI in VDA 4398 | Sends your invoices to Mercedes-Benz invoice verification in the VDA 4398 format. | An EDI connection set up with Mercedes-Benz. |
| Basware and self-billing | PDF invoices and structured data formats through Basware, or self-billing where Mercedes-Benz issues the invoice. | Set up with Mercedes-Benz before you send invoices this way. |
| The Supplier Portal by hand | The Financial Vendor Portal for invoice status, payment advices and master data, one legal entity at a time, with lists to Excel; proQ for purchasing documents. | Free registration with a valid Mercedes-Benz supplier number, and each application approved by your Portal Manager. |

Read on November 12, 2026: [Invoice Transmission](https://supplier.mercedes-benz.com/docs/DOC-3255), [User Manual for Financial Vendor Portal](https://supplier.mercedes-benz.com/sites/default/files/collaboration-fo/2569-en/DOC-3221/files/attachment-4150-User-Manual-for-FVP.pdf), [Your access to the procurement system proQ](https://supplier.mercedes-benz.com/docs/DOC-1310).

## Signing in to the Supplier Portal

You sign in to the Supplier Portal with your User ID and password, and the portal has introduced multi-factor authentication. Each application, such as the Financial Vendor Portal or proQ, appears once your Portal Manager approves it. With Fous you sign in once through the Supplier Portal's own sign-in with your own account, and the login is sealed with AES-256.

## Worth knowing

- **Every application needs your Portal Manager**: You request the Financial Vendor Portal or the proQ with eAccept role under Request New Applications, and your company's Portal Manager approves it (for proQ, in GEMS/ALICE). A new proQ tile can take until the next day to appear.
- **One legal entity at a time**: The Financial Vendor Portal opens with Mercedes-Benz AG selected. To see another company you select it first, so a method takes the legal entity as an input.
- **proQ documents are binding**: Documents and transactions sent through proQ count as legally binding declarations of intent without a signature. The workflows here only count open proQ documents and send nothing to proQ.
- **Debit and credit notes come by email**: Since 1 December 2023, Mercedes-Benz AG, Mercedes-Benz Group AG and their subsidiaries send debit and credit notes by email instead of on paper.

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## Frequently asked questions

### Does the Mercedes-Benz Supplier Portal have an API?

Not one described on its supplier pages. Invoices go to Mercedes-Benz electronically by self-billing, EDI in VDA 4398, or PDF and structured formats through Basware. Invoice status, payment advices and master data are read in the Financial Vendor Portal by hand, where lists download to Excel.

### How do I see whether a Mercedes-Benz invoice is blocked or paid?

Open Display Invoice Status in the Financial Vendor Portal for the legal entity you billed. Open invoices can be searched by your invoice number, document number, date, amount or currency, and the Payment Block checkbox shows blocked ones. Closed invoices are searched by time span, and Payment Advices lists what was paid.

### How do I get access to the Financial Vendor Portal?

Register for the Supplier Portal with your Mercedes-Benz supplier number, then choose Request New Application, select FVP and request access. Once your Portal Manager approves it, you launch FVP from Your Applications.

### Where do I find requests for quotation and contracts?

In proQ, spread over three tiles. proCure with eAccept holds contracts with price structure and price requests, proFrame with eAccept holds contracts without price structure, and proSource holds production material and complex non-production material requests for quotation.

### Is Fous affiliated with Mercedes-Benz AG?

No. Fous is an independent product. You use it with your own Mercedes-Benz Supplier Portal account, and a method reads and does only what that account can.

Fous is an independent product: it is not affiliated with, endorsed by or sponsored by the operator of Mercedes-Benz Supplier Portal (Mercedes-Benz AG). The name is used only to say which system this page is about. Something here wrong or out of date? Write to legal@fous.com.