# getblockhash

Returns hash of block in best-block-chain at height provided.

### Argument #1 - height

**Type:** numeric, required

The height index

**Request**

{% tabs %}
{% tab title="Curl" %}

```bash
curl --location --request POST 'https://btc.api.watchdata.io/node/jsonrpc?api_key=your_api_key' \
--header 'x-api-key: your_api_key' \
--header 'Content-Type: application/json' \
--data-raw '{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "getblockhash",
    "params": [
        1000
    ]
}'
```

{% endtab %}

{% tab title="Postman" %}

```json
URL: https://btc.api.watchdata.io/node/jsonrpc?api_key=your_api_key
RequestType: POST
Body: 
{
    "jsonrpc": "1.0",
    "id": "curltest",
    "method": "getblockhash",
    "params": [
        1000
    ]
}
```

{% endtab %}
{% endtabs %}

**Response**

```json
"00000000c937983704a73af28acdec37b049d214adbda81d7e2a3dd146f6ed09"
```