Release Notes - StableFX - 2025

Launched StableFX, an institutional-grade stablecoin FX engine built on Arc that combines Request-for-Quote (RFQ) execution with onchain settlement.

Added the following documentation to support the StableFX launch:

• StableFX Overview
• StableFX Technical Guide
• Quickstart: Create an FX Trade as a Taker
• Quickstart: Fulfill an FX Trade as a Maker
• How-to: Grant USDC Allowance with Permit2
• Tutorial: Test StableFX Integration as a Taker
• Tutorial: Test StableFX Integration as a Maker
• StableFX Contract Interfaces
• StableFX Supported Currencies

Added the following StableFX API endpoints:

• POST /v1/stablefx/quotes
• GET /v1/stablefx/quotes/{quoteId}
• POST /v1/stablefx/trades
• GET /v1/stablefx/trades
• GET /v1/stablefx/trades/{tradeId}
• POST /v1/stablefx/trades/{tradeId}/signature-data
• POST /v1/stablefx/trades/{tradeId}/signatures
• POST /v1/stablefx/trades/{tradeId}/fund