> ## 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.

# Activate Routing Algorithm

> Curl example for activating a routing algorithm.

# Activate Routing Algorithm

At a given time, one algorithm for each `algorithm_for` value can be active for one merchant.

## Request

```bash theme={null}
curl --location "$BASE_URL/routing/activate" \
  --header "$AUTH_HEADER" \
  --header "Content-Type: application/json" \
  --data '{
    "created_by": "merchant_demo",
    "routing_algorithm_id": "routing_e641380c-6f24-4405-8454-5ae6cbceb7a0"
  }'
```

## Response

Success returns HTTP `200` with an empty response body.

## Related

* [Deactivate Routing Algorithm](/decision-engine-api-reference/api-reference/guides/configure-routing/routing-algorithm-deactivate)
* [List Active Routing Algorithms](/decision-engine-api-reference/api-reference/guides/configure-routing/routing-algorithm-list-active)