V4 API Overview

Welcome to V4 of the XO Swap API - our next-generation API with enhanced features and improved performance.

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Authorization Required: All API requests require specific headers. See the Authorization guide for details.

What’s New in V4

Best Rate Discovery: Automatically finds the best swap rates by combining multiple providers and strategies
CAIP-19 Standard: All assets use the CAIP-19 (Chain Agnostic Improvement Proposal) format for consistent asset identification across blockchains
Unsigned Transactions: Returns ready-to-sign transactions for seamless integration
Enhanced Error Handling: Improved error messages and response codes