> ## Documentation Index
> Fetch the complete documentation index at: https://api-reference.hyperswitch.io/llms.txt
> Use this file to discover all available pages before exploring further.

# Legacy Decision Gateway

> Compatibility example for the legacy /decision_gateway route.

# Legacy Decision Gateway

`/decision_gateway` is retained for compatibility with older integrations. New integrations should use [`/decide-gateway`](/decision-engine-api-reference/api-reference/guides/run-transactions/decide-gateway-sr-based).

```bash theme={null}
curl --location "$BASE_URL/decision_gateway" \
  --header "$AUTH_HEADER" \
  --header "Content-Type: application/json" \
  --data '{
    "merchantId": "merchant_demo",
    "eligibleGatewayList": ["stripe", "adyen"],
    "rankingAlgorithm": "SR_BASED_ROUTING",
    "paymentInfo": {
      "paymentId": "legacy_001",
      "amount": 1000,
      "currency": "USD",
      "paymentType": "ORDER_PAYMENT",
      "paymentMethodType": "CARD",
      "paymentMethod": "CREDIT"
    }
  }'
```