SirsiDynix

SirsiDynix Symphony is a proprietary ILS.

Symphony can be integrated with a Library Simplified circulation manager through SIP.

Symphony also has a custom API, but access to the documentation requires a subscription so I don't know if it provides what we need. However I can glean a few details from records of other people's clients for the Symphony API, and it looks more or less like what we need.

• This Github repository shows the existence of a loginUser method which takes arguments login and password, and a lookupMyAccountInfo method which gets patron info.
• This Code4Lib Journal article gives some examples of loginUser and lookupMyAccountInfo in use.