cardano-sl:node, cardano-sl:explorer, cardano-sl:wallet - Cardano settlement layer is deployed as a standalone node that connects to the Cardano blockchain. It ships with an integrated Cardano wallet and explorer and has its own set of APIs which can be accessed via HTTP. cardano-sl is considered to be close to end-of-life.
It will not support the Shelley hard fork and exchanges or third-party party wallets using cardano-sl should move to a Shelley-supported version of Cardano, such as the recently released cardano-node.
If you would like to receive the IOHK newsletter for Exchanges then let us know by submitting a support ticket.