Developer Overview

o2 Exchange provides a complete developer toolkit for building trading applications, bots, and integrations on top of a fully on-chain central limit order book (CLOB) built on the Fuel blockchain.

Whether you want to place your first trade in five minutes or build a production market-making bot, everything you need is below.

SDKs

Get started quickly with official SDKs in your preferred language.

Language	Package	Quick Start
TypeScript	@o2exchange/sdk	TypeScript Quick Start
Python	o2-sdk	Python Quick Start
Rust	o2-sdk	Rust Quick Start

Each quick start walks you through setup, authentication, and placing your first trade.

Migrating a CCXT bot?

Use the CCXT-Compatible API for familiar unified methods and normalized responses in TypeScript or async Python.

AI Tools

Build faster with Skills for installable agent context and the MCP Server for natural-language trading, balances, and market checks.

REST & WebSocket API

Full programmatic access to the exchange - no SDK required.

• API Overview - Start here for networks, server location, rate limits, pagination, endpoint categories, and reference conventions.
• WebSocket - Real-time streaming for order book updates, trade feeds, and account notifications.
• Error Codes - Structured error responses and numeric error code reference.

Guides & References

• Trading Agent Guide - End-to-end walkthrough for building an automated trading bot: project setup, price oracles, order execution, and monitoring.
• Network Identifiers - Contract addresses, chain IDs, and RPC endpoints for mainnet and testnet.
• Parameters Reference - Exchange parameters such as tick sizes, lot sizes, and fee tiers.
• Data Flows - Architecture diagrams showing how transactions, indexing, and WebSocket notifications work under the hood.

Further Resources

• Contracts - On-chain Sway smart contracts powering the order book.
• SDKs - TypeScript, Python, and Rust SDK source code.
• MCP Server - MCP server source code.
• Audits - Security audit reports.