FRAX is a dollar-pegged stablecoin that uses AMO smart contracts and permissionless, non-custodial subprotocols as stability mechanisms. The two internal subprotocols used as stability mechanisms are Fraxlend, a decentralized lending market and Fraxswap, an automated market maker (AMM) with special features. The external subprotocol used as a stability mechanism is Curve. Additional subprotocols and AMOs can be added with governance allowing FRAX to incorporate future stability mechanisms seamlessly as they are discovered.