Power Automate Expense Approval with Corules Validation

Das Problem

Add Corules policy validation to Power Automate expense approval flows via the Corules Custom Connector. Expense reports are validated before routing — eliminating manual out-of-policy approvals.

Einrichtungsschritte

1. 1

   Import the Corules Custom Connector into your Power Platform environment

2. 2

   Configure the connector with your tenant API key and base URL

3. 3

   In your expense approval Flow, add a Corules 'Validate Decision' action after the form submission trigger

4. 4

   Map expense fields (amount, category, receipt_present, business_purpose) to the Corules context schema

5. 5

   Add a Switch on the outcome: ALLOW → notify manager for awareness, ESCALATE → route to finance, BLOCK → reject with reason

Codebeispiel

// Power Automate HTTP action to Corules
{
  "method": "POST",
  "uri": "https://api.corules.com/v1/validate",
  "headers": {
    "Authorization": "Bearer @{variables('CorulesApiKey')}",
    "X-Tenant-Id": "@{variables('TenantId')}",
    "X-Correlation-Id": "@{triggerOutputs()?['headers']?['x-ms-workflow-run-id']}"
  },
  "body": {
    "use_case": "expense_approval",
    "actor": "@{triggerBody()?['submitter_email']}",
    "context": {
      "amount": "@{triggerBody()?['amount']}",
      "category": "@{triggerBody()?['category']}",
      "receipt_present": "@{triggerBody()?['receipt_url'] != null}",
      "business_purpose": "@{triggerBody()?['business_purpose']}"
    },
    "decision": {
      "approve": true
    }
  }
}

Frequently Asked Questions