Pull your GrabMerchant transactions into your systems

What you can build on the GrabMerchant portal

• Get transactions for a date range

  Build this

  Reads the Transactions list under the Finance tab of the GrabMerchant portal, for one store or all stores, with each transaction's status and category.

  Takes

  Store or all stores, date range, category (optional)

  Returns

  Created on, date completed or cancelled, store, status, category, business line, booking ID, amount, net sales

• List adjustments with their description

  Build this

  Filters Finance > Transactions by the Adjustment category and expands each one to read the Description that says what it was for.

  Takes

  Store or all stores, date range

  Returns

  Date, store, category, amount, description

• Find failed and cancelled transactions

  Build this

  Reads Finance > Transactions for transactions with the status Failed, Cancelled or Transfer failed, with who cancelled each order.

  Takes

  Store or all stores, date range, statuses

  Returns

  Created on, store, status, category, amount, cancellation by, booking ID

• Edit a menu item

  Build this

  Opens the menu editor in the GrabMerchant portal for a single-store merchant, finds the item under its category, applies the changes you give and saves.

  Takes

  Item name, category, changes to make

  Returns

  Item name, category, fields changed, values before and after

Automate the GrabMerchant 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.

• Last week's transactions, handed to accounting

  Build this

  Starts

  Every Monday at 8:00

  Step 1

  Get the transactions for all stores from Monday to Sunday of last week.

  Step 2

  Keep the ones with status Completed or Transferred.

  Step 3

  Post each one, with store, category, amount and net sales, to your accounting system's webhook.

• Failed transfers and payments, every morning

  Build this

  Starts

  Every weekday at 9:00

  Step 1

  Find the transactions with status Failed or Transfer failed since yesterday, across all stores.

  Step 2

  Stop when there are none.

  Step 3

  Email you the list, one section per store.

• Last week's adjustments, grouped by reason

  Build this

  Starts

  Every Monday at 9:00

  Step 1

  List last week's adjustments for all stores, with each one's description.

  Step 2

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

  Step 3

  Group them by the reason in their description with an AI step and email you each group's total.

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 transactions for a date range” would look like.

curl https://api.fous.com/v1/runs \
  -H "Authorization: Bearer $FOUS_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "method": "merchant.grab.com/get_transactions",
    "input": {
      "store": "Acme Noodle Bar - Tanjong Pagar",
      "from": "2026-11-02",
      "to": "2026-11-08"
    }
  }'

{
  "status": "completed",
  "data": {
    "store": "Acme Noodle Bar - Tanjong Pagar",
    "transactions": [
      {
        "created_on": "2026-11-08T12:41:00+08:00",
        "date_completed_or_cancelled": "2026-11-08T13:05:00+08:00",
        "status": "Completed",
        "category": "Payment",
        "business_line": "GrabFood",
        "booking_id": "A-7Q2KX9LMP4",
        "amount": 38.6,
        "net_sales": 34.6
      }
    ],
    "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 GrabMerchant portal’s own options

Grab documents a GrabFood Partner API for menu sync, orders, store operations such as delivery and special opening hours, campaigns and loyalty. You onboard an application to Grab's platform and use OAuth 2.0, and merchants activate their stores from within their POS. Transactions and financial reports are read or downloaded in the GrabMerchant portal.

Read on November 12, 2026: GrabFood Partner API, Access and download GrabMerchant financial reports, What is a Multi-Entity login.

Signing in to the GrabMerchant portal

The GrabMerchant portal signs you in with a username and password, or with Google for accounts registered with Grab that way. Logins carry the Owner, Store Manager or Cashier role, and features such as payments and the menu editor are for Owner and Store Manager. With Fous you sign in once through the portal's own sign-in with your own account: the login is sealed with AES-256 and never reaches your code or agents.

Worth knowing

Menu edits in the portal are single-store

Grab says editing the menu or catalogue from the portal is available for single-store merchants only. For help with changes, Grab takes a filled-in GrabFood menu template through its request form.

Cancelled-order compensation is automatic

Compensation for cancelled orders needs no request. Grab processes it by itself and pays it to your bank account by the end of the following week.

Adjustments are explained per transaction

In the portal an adjustment shows in the Category column and its reason in the Description of the expanded transaction. The financial report adds a Sub-Category column such as Commission or Advertising.

GrabFood paid by GrabPay counts as GrabFood

For stores with both services, GrabFood orders paid with GrabPay appear as GrabFood transactions. Business Line tags each transaction for reconciliation.

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