Release Notes - StableFX - 2025

2025 release notes for StableFX

November 2025

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2025.11.13

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

Documentation additions

Added the following documentation to support the StableFX launch:

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

API additions

Added the following StableFX API endpoints:

• POST /v1/stablefx/quotes
• 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