A Sept. 5 XRPL Standards discussion proposes a permissioned automated market maker (AMM) that would extend the ledger's existing Credentials and Permissioned Domains architecture to native liquidity pools. The concept remains an XLS Idea, has not been approved as an amendment and is not active on the XRP Ledger. The proposal addresses a gap in XRPL's institutional decentralized finance (DeFi) infrastructure: its Permissioned DEX (decentralized exchange) can limit order-book trading to wallets with approved credentials, but official documentation says permissioned trades cannot use AMMs and existing AMM access cannot currently be restricted through a Permissioned Domain. The proposed design would attach a DomainID to each pool, potentially controlling who can provide liquidity, participate in governance or swap, while allowing liquidity providers to withdraw assets if their credentials expire. It could extend a shared compliance framework across the Permissioned DEX, Single Asset Vaults, lending and AMMs. The initiative follows Coinpaper's coverage of XRPL's Permissioned DEX and its broader institutional infrastructure, as well as Ripple's roadmap placing permissioned trading alongside lending and tokenization. Coinpaper also recently described how permissioned domains, credentials, vaults and lending are being combined for compliant institutional lending.