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.

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 Endpoints Reference - Complete endpoint catalog covering market data, order management, account operations, session keys, and more. Includes interactive examples.
• 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.