> ## Documentation Index
> Fetch the complete documentation index at: https://docs.moralis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# eth_getUncleCountByBlockHash

> Returns the number of uncles in a block from a block matching the given block hash.

#### Path parameters

<ResponseField name="apiKey" type="string" required>
  Your API key for authentication
</ResponseField>

#### Request

<ResponseField name="hash" type="string" required>
  Hash of a block
</ResponseField>

#### Example request `params`

```javascript theme={null}
[
  "0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2"
]
```

<RequestExample>
  ```shellscript curl theme={null}
  curl https://site1.moralis-nodes.com/arbitrum/:apiKey \
    -X POST \
    -H "Content-Type: application/json" \
    -d '{"jsonrpc": "2.0", "method": "eth_getUncleCountByBlockHash", "params": ["0x1d59ff54b1eb26b013ce3cb5fc9dab3705b415a67127a003c3e61eb445bb8df2"], "id": 1}'
  ```
</RequestExample>

<ResponseExample>
  ```json JSON theme={null}
  {
    "jsonrpc": "2.0",
    "id": 1,
    "result": "0x1"
  }
  ```
</ResponseExample>