Welcome to the official 1inch Business Portal documentation hub.
Here you’ll find comprehensive guides and references to help you integrate, build, and scale with 1inch APIs and protocols.

## What is 1inch Business Portal

1inch Business Portal is a SaaS Web3 infrastructure platform offering subscription-based access to the broader 1inch ecosystem, built on top of 1inch’s battle-tested and widely adopted swap and execution technology, and designed for developers and businesses building and scaling on-chain applications.

From early-stage startups to enterprises and institutions, 1inch Business Portal provides subscription-based access to the broader 1inch ecosystem, offering a scalable Web3 infrastructure platform built for high-throughput usage, production reliability, and long-term integrations. It supports mission-critical use cases across wallets, fintechs, trading platforms, and infrastructure providers operating under real-world load.

## Product Areas

The 1inch Business Portal provides access to a set of core product areas across the broader 1inch ecosystem, enabling developers and businesses to build, operate, and scale on-chain applications using a unified Web3 infrastructure platform.

### Swap Execution, DEX Liquidity Aggregation & Orderbook

Includes classic (pro-mode) swaps, intent-based swaps (Fusion), cross-chain swaps (Fusion+), orderbook functionality, and support for real-world assets (RWAs).
This product area is designed for aggregating liquidity across decentralized exchanges (DEXs) and executing on-chain trades through both direct, transaction-based swaps and orderbook-driven trading workflows, alongside intent-driven execution models.

### Market & Trading Data

Includes spot pricing, orderbook data, token metadata, token details, and market charts.
These capabilities support pricing, discovery, analytics, and user-facing trading interfaces.

### Portfolio & Account Data

Includes balance information and portfolio composition across supported networks.
This product area enables portfolio tracking, asset monitoring, and account-level insights.

### Transactions & On-Chain Activity

Includes transaction execution via a gateway, historical transaction data, and execution traces.
These capabilities support monitoring, analytics, auditing, and operational workflows.

### Network & Infrastructure Data

Includes gas price estimation, Web3 RPC access, and domain resolution.
This product area provides production-ready blockchain connectivity for scalable and reliable on-chain interactions.

## Supported chains

| Chain                   | Chain ID |
| :---------------------- | :------- |
| Ethereum                | 1        |
| Solana                  | 501      |
| Base                    | 8453     |
| Binance                 | 56       |
| zkSync                  | 324      |
| Gnosis                  | 100      |
| Optimism                | 10       |
| Polygon                 | 137      |
| Linea                   | 59144    |
| Sonic                   | 146      |
| Unichain                | 130      |
| Arbitrum                | 42161    |
| Avalanche               | 43114    |
| Cronos                  | 25       |
| Monad (RPC Nodes only ) | 143      |

## Developer Resources

- [OpenAPI Specifications](/portal/documentation/apis): Interactive API references with try-it-out
- [Available SDKs](/portal/documentation/sdks/available-sdks): TypeScript SDKs for swap, orderbook, and cross-chain
- [1inch MCP Server](/portal/documentation/ai-integration/ecosystem): Connect your AI coding assistant to 1inch docs and APIs
- [LLM-optimized documentation](/llms.txt): Machine-readable documentation index for AI agents and automation

> For the canonical, machine-readable index of all APIs (recommended for AI agents and automation), see [llms.txt](/llms.txt).

## Integration support

The documentation covers multiple product integration paths, including:

- SDKs for faster, opinionated development
- REST APIs for flexible backend integrations
- WebSockets for real-time data and events (Swap API - for Intent and Cross Chain, Web3 RPC API)
- JSON-RPC for direct blockchain interactions (Web3 RPC API)
- gRPC for high-performance, low-latency use cases (Web3 RPC API on Solana)

## Quick links

<div class="grid grid-cols-1 gap-4 auto-rows-auto">
  <a class="tile flex flex-col gap-2 cursor-pointer whitespace-pre-wrap bg-slate-50" href="documentation/apis/authentication">
    <div >Authentication</div>
     </a>
    <div>View authentication requirements for all 1inch APIs and services.</div>

  <a class="tile flex flex-col gap-2 cursor-pointer whitespace-pre-wrap" href="documentation/apis/swap">
    <div >APIs</div>
     </a>
    <div>Explore 13+ API products with rich documentation, examples, and OpenAPI specs—and experience them live by running API requests directly.</div>

   <a class="tile flex flex-col gap-2 cursor-pointer whitespace-pre-wrap" href="documentation/apis/swap/fusion-plus/introduction">
   <div >SDKs</div>  </a>
    <div>Explore official SDKs.</div>

  <a class="tile flex flex-col gap-2 cursor-pointer whitespace-pre-wrap" href="documentation/ai-integration/ecosystem">
    <div>AI Integration</div>
  </a>
  <div>Connect AI coding assistants to 1inch documentation and SDK examples using Model Context Protocol.</div>

<a class="tile flex flex-col gap-2 cursor-pointer whitespace-pre-wrap" href="documentation/resolvers">

<div>Resolvers</div></a>
<div>Access resolver requirements, terms and onboarding flows.</div>

  <a class="tile flex flex-col gap-2 cursor-pointer whitespace-pre-wrap" href="documentation/faq">
    <div >Frequently Asked Questions (FAQs)</div>  </a>
    <div>Get answers to the most common questions about using 1inch.</div>

</div>