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

# Data Cloud API (Deprecated)

<Warning>
  ❗️ Warning

  The feature will be discontinued and no longer available on \[ 2024-12-31 ]

  Recommend using our latest version of the [DataCloud API.](/resources/platform/features/api/sql-api/datacloud-task-api)
</Warning>

<Info>
  📘 Don’t have an API key?

  Go to [console.chainbase.com](https://console.chainbase.com/) to create an account and a new API key.
</Info>

## What is Data Cloud?

The Chainbase Data Cloud lets you run your low-latency queries through an endpoint to leverage all our indexed datasets for your custom needs. Chainbase's [Data Cloud](/resources/platform/datasets/overview) is a fully managed online data warehouse service for Web3 developers.  Developers can query the data warehouse through the **API** to access our datasets with zero infra cost.  And the **Data Cloud**'s scalable, distributed analytical data engine and intelligent data modeling allow you to query terabytes of data **in seconds**.

## Quickstart

Query the hashes of the last 3,000 blocks in Ethereum and the number of transactions in each block:

```bash theme={null}
curl -X "POST" "https://api.chainbase.online/v1/dw/query" \
     -H 'X-API-KEY: YOUR-API-KEY ' \
     -H 'Content-Type: application/json; charset=utf-8' \
     -d $'{
  "query": "select number, transactions_count from ethereum.blocks order by number desc limit 3000;"
}'
```

If there are more than 1000 rows, you need to paginate through the`task_id` and `page` to get all the results:

```bash theme={null}
curl -X "POST" "https://api.chainbase.online/v1/dw/query" \
     -H 'X-API-KEY: YOUR-API-KEY ' \
     -H 'Content-Type: application/json; charset=utf-8' \
     -d $'{
       "task_id": "xxxxxxxxxxxxxxxxxxxxx",
       "page": 2
}'
```

## API Reference

If you want to know more details on the endpoint and optional parameters, check out:

* [SQL API (Classic)](/api-reference/sql-api/data-cloud-sql-query)