> For the complete documentation index, see [llms.txt](https://dev.ada-anvil.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://dev.ada-anvil.io/guides/delegations/delegate-to-a-drep.md).

# Delegate to a DRep

DRep (Delegation Representative) delegation enables users to participate in Cardano's governance system by assigning their voting power to chosen representatives. By integrating DRep delegation into your application, you empower users to influence the blockchain's future without requiring them to actively participate in every governance decision.

## API Endpoint

**URL**: `https://preprod.api.ada-anvil.app/v2/services/transactions/build`\
**Method**: POST\
**Headers**: `Content-Type: application/json`, `x-api-key: YOUR_API_KEY`

## Request Format

```json
{
  "changeAddress": "addr_test1...",
  "utxos": ["8282...", "8282..."],
  "delegations": [
    {
      "type": "drep",
      "address": "addr_test1...",
      "keyHash": "drep13d6sxkyz6st9h65qqrzd8ukpywhr8swe9f6357qntgjqye0gttd"
    }
  ]
}
```

## Parameter Details

| Parameter | Description                       | Example                  |
| --------- | --------------------------------- | ------------------------ |
| `type`    | Must be `"drep"`                  | `"drep"`                 |
| `address` | User's full address               | `"addr_test1..."`        |
| `keyHash` | DRep ID to delegate to            | `"drep13d6s..."`         |
| `utxos`   | Array of UTXOs in CBOR hex format | `["8282...", "8282..."]` |

## Implementation Examples

**Using Fetch API:**

{% content-ref url="/pages/91YG6z42M04LInALjboG" %}
[Deno & Fetch](/guides/delegations/delegate-to-a-drep/deno-and-fetch.md)
{% endcontent-ref %}

**Using cURL:**

{% content-ref url="/pages/s4ycPbUoRrJNj7KPhj0x" %}
[Bash & cURL](/guides/delegations/delegate-to-a-drep/bash-and-curl.md)
{% endcontent-ref %}

## Transaction Signing

After building the transaction, it must be signed before submission:

{% content-ref url="<https://github.com/Cardano-Forge/anvil-api/blob/main/docs/guides/transaction/signing-transaction.md>" %}
<https://github.com/Cardano-Forge/anvil-api/blob/main/docs/guides/transaction/signing-transaction.md>
{% endcontent-ref %}

## User Interface Examples

<figure><img src="/files/aciYKy4GbwODcmxC7y2c" alt="Eternl Vote Delegation"><figcaption><p>Eternl's DRep delegation interface provides a good reference</p></figcaption></figure>