Track your NatWest mortgage cases from your own systems

What you can build on the Broker Portal

• List submitted cases

  Build this

  Reads the cases listed under Submitted Cases in the Broker Portal: each application's mortgage reference number, client and status.

  Takes

  Nothing

  Returns

  Mortgage reference number, client name, status

• Check a case in Case Tracking

  Build this

  Opens one case in Case Tracking and reads its milestones, the valuation appointment status and the returned valuation figure.

  Takes

  Mortgage reference number

  Returns

  Mortgage reference number, milestones with their status, valuation status, valuation figure, property address, product

• Get the further information requested

  Build this

  Reads what the lender has asked for on one case in Case Tracking, as the Broker Portal lists it.

  Takes

  Mortgage reference number

  Returns

  Mortgage reference number, client name, items requested, uploads confirmed

• Upload a document to a case

  Build this

  Opens the case in Case Tracking, goes to the Upload document/further information tab and uploads a JPG, PNG or PDF of up to 8 MB.

  Takes

  Mortgage reference number, document type, file

  Returns

  Mortgage reference number, file name, upload confirmed

Automate the Broker Portal 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.

• Case Tracking milestones that moved since the last check

  Build this

  Starts

  Every weekday at 8:00

  Step 1

  List your Submitted Cases in the Broker Portal.

  Step 2

  For each case, check its milestones and valuation status in Case Tracking.

  Step 3

  Keep the cases whose milestones changed since the last run.

  Step 4

  Email you the list, with mortgage reference number, client name and the milestone that moved.

• New further information requests, sent to your CRM

  Build this

  Starts

  Every hour

  Step 1

  List your submitted cases and, for each, get the further information requested.

  Step 2

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

  Step 3

  Post each item, with mortgage reference number and client name, to your CRM webhook.

• Returned valuation figures, posted to your case system

  Build this

  Starts

  Every weekday at 17:00

  Step 1

  List your submitted cases and, for each, read the valuation status and figure in Case Tracking.

  Step 2

  Keep the cases with a valuation figure that was not there on the last run.

  Step 3

  Post mortgage reference number, client name, property address and valuation figure to your 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 “List submitted cases” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "spa.mortgages.natwest.com/list_submitted_cases",
    "input": {}
  }'

{
  "status": "completed",
  "data": {
    "cases": [
      {
        "mortgage_reference": "MR-48213907",
        "client_name": "J. Acme",
        "status": "Valuation instructed"
      },
      {
        "mortgage_reference": "MR-48207714",
        "client_name": "R. Globex",
        "status": "Further information requested"
      },
      {
        "mortgage_reference": "MR-48199052",
        "client_name": "S. Northwind",
        "status": "Offer issued"
      }
    ],
    "count": 3
  }
}

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 Broker Portal’s own options

NatWest's broker pages describe the Broker Portal as the way to place business: you submit the application online, then upload the packaging against its mortgage reference number and follow it in Case Tracking. They do not describe an API or file feed for brokers. Customers can follow their own application in the NatWest app and online.

Read on November 12, 2026: Broker Portal Guidance, Placing Business, Customer application tracking.

Signing in to the Broker Portal

The Broker Portal signs you in with a username and password, and you register first as a broker or as an admin. With Fous you sign in once through the Broker Portal's own sign-in with your own account: the login is sealed with AES-256, never returned by the API or written to logs, and a method reads and does only what your account can.

Worth knowing

New submissions take up to 24 hours to appear

A submitted case moves from recent cases to submitted cases, which can take up to 24 hours. Porting cases can take 72 hours because they are keyed manually.

Uploads show a confirmation, not the file

Documents go in as JPG, PNG or PDF of up to 8 MB. After uploading you see a confirmation that they arrived, but not the documents themselves.

Save the full application before completion

You can download a copy of the full mortgage application only until the mortgage completes. NatWest cannot send it to you afterwards.

Changing your details hides older cases

If you change your last name, email address or firm address in Maintain Details, applications submitted before the change are no longer visible on the portal.

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