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

# Introduction

> Overview of the OneBalance API, versioning, and general conventions

The OneBalance API provides a programmatic interface for managing OneBalance resources using standard HTTP requests. The API documentation includes a design and technology overview, followed by detailed endpoint information.

## Features

OneBalance API provides a complete chain abstraction toolkit:

* **Smart Account Management**: Predict addresses and deploy accounts
* **Cross-Chain Balances**: View aggregated balances across multiple chains
* **Multichain Transactions**: Execute transfers and swaps using aggregated balances
* **Arbitrary Contract Executions**: Execute any smart contract function across multiple chains using aggregated assets
* **Transaction Status**: Track multichain transaction history and status
* **Token Aggregation**: Access unified token lists and pricing information

<Tip>
  **Enterprise API Access**: Need higher rate limits, dedicated infrastructure, or custom SLAs? [Contact our sales team](mailto:sales@onebalance.io) for enterprise API solutions.
</Tip>

## Base URL

OneBalance API is built on REST principles and is served over HTTPS. To ensure data privacy, unencrypted HTTP is not supported.

The Base URL for all API endpoints is:

```bash theme={null}
https://be.onebalance.io/api
```

## Quickstart

Try our reference application at [app.onebalance.io](https://app.onebalance.io) to see the API in action or jump straight into our [API Reference](/api-reference/account/predict-address) to start building.

## OpenAPI Specification

You can access the complete OpenAPI specification in JSON format at:

```bash theme={null}
https://docs.onebalance.io/api-reference/openapi.json
```

Use this specification to generate client libraries, import into API testing tools like Postman or Insomnia, or integrate with your development workflow.