Breaking Change: Update the FIX infrastructure to improve performance, reliability and security for FIX connections. This change enables multiple FIX connections for a single account and improves TLS certificate management, among other changes. All existing FIX users are required to migrate to the new infrastructure no later than May 4, 2024. See the migration guide or contact your Paxos Representative for details.
FIX: Add SelfMatchPreventionID (tag 2362) to prevent matching against an opposite side order submitted by the same Crypto Brokerage customer. If this tag is not submitted, an order that matches against another order submitted by the same customer will cancel the original resting order.
Sandbox: PYUSD trading pairs are available in the Sandbox environment for REST and FIX users. All relevant endpoints support PYUSD-based trading pairs (for example, BTC:PYUSD and ETH:PYUSD among other). Contact your Paxos Representative for details.