# Welcome to Data123 Documents!

## Welcome to Data123 Blockchain API Service

Blockchain API service makes it easy for developers to interact with the multiple blockchains. It provides a simple way to read and write data to the blockchain, without having to worry about the complexities of running an Blockchain node.

Blockchain APIs have various use cases, including:

1. Building blockchain applications: Developers can use blockchain APIs to create applications that interact with blockchain networks, such as cryptocurrency trading platforms, decentralized finance (DeFi) applications, or supply chain management systems.
2. Accessing blockchain data: Blockchain APIs provide access to blockchain data, allowing developers to retrieve transaction history, smart contract information, and market data. This data can be used for analysis, reporting, or integration with other applications.
3. Sending transactions: Blockchain APIs enable developers to send transactions to a blockchain network. This includes tasks like sending cryptocurrency, modifying smart contracts, or performing other operations on the blockchain.

## How to use api service ? jump right in

Jump in to the quick start docs and get making your first request:

{% content-ref url="quick-start" %}
[quick-start](https://doc.data123.io/quick-start)
{% endcontent-ref %}

## Want to deep dive?

Dive a little deeper and start exploring our API reference to get an idea of everything that's possible with the API:

{% content-ref url="reference/api-reference" %}
[api-reference](https://doc.data123.io/reference/api-reference)
{% endcontent-ref %}


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GET https://doc.data123.io/welcome-to-data123-documents.md?ask=<question>
```

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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.