# GET /block-height/:height

Returns the hash of the block currently at `height`.

This method will use `10` [Compute Units](/v1/about/billing.md).

***

## **Parameters**

**`block height`** - required.

Example: `910883`

## Returns

Returns the hash of the block currently at `height`.

{% code overflow="wrap" %}

```json
00000000000000000001129bff5a606bd4999e3594613fa13453a0f3635ed35b
```

{% endcode %}

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

```bash
curl https://mainnet.bitcoin.validationcloud.io/v1/<YOUR_API_KEY>/block-height/:height \
 -X GET
```

{% endtab %}

{% tab title="testnet" %}

```bash
curl https://testnet.bitcoin.validationcloud.io/v1/<YOUR_API_KEY>/block-height/:height \
 -X GET
```

{% endtab %}
{% endtabs %}


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.validationcloud.io/v1/bitcoin/esplora-http-api/blocks/get-block-height-height.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.