# Cronos zkEVM Developer Portal and APIs

### Introduction 

With the Cronos zkEVM Developers Portal, developers gain access to the blockchain explorer's Developer API, contract verification data, and, soon, a SubGraph service.

These resources empower developers to easily access Cronos zkEVM blockchain data, accelerating the development process of decentralized applications.

Website: <https://developers.zkevm.cronos.org/>

### Developer API Access

At the heart of the Cronos zkEVM Developers Portal is the Developer API documentation, which offers access to the blockchain explorer's APIs. These APIs empower developers to efficiently query blockchain data using GET/POST requests. Available data includes:

* Accounts data: Balance, transaction history, internal transactions
* Blocks data: Block details
* Contracts data: ABI, source code, verification submissions, and status
* ETH proxy: Proxy for commonly used zkEVM RPC endpoints
* Logs data: Log details
* Tokens data: Account balance for tokens, total supply for tokens
* Transactions data: Transaction status

The Developer API provides real-time data, ensuring that your applications have access to the most current information. Typically updated within a few minutes, this data enhances the performance and reliability of your dapps.<br>

### Getting Started With the Cronos zkEVM Developer API

To get started with the Cronos zkEVM developer API, simply register an account on the [Account Registration page](https://developers.zkevm.cronos.org/register) in Cronos zkEVM developer portal, where you can access a pair of mainnet and testnet API keys on the user dashboard. You can then access the developer API service and use it to retrieve data from the available endpoints.

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The Developer API service is well-documented with comprehensive guides and examples to help you get started quickly. The documentation provides  information on making requests, parsing responses, and using the various endpoints, as well as access to a range of data on the Cronos zkEVM, including accounts, blocks, contracts, transactions, logs, tokens, statistics, and more.

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For more detailed information, refer to the [Cronos zkEVM API documentation](https://explorer-api-doc.zkevm.cronos.org/mainnet).


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# 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-zkevm.cronos.org/for-developers/developer-tools/cronos-zkevm-developer-portal-and-apis.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.