The Sage CRM 2021 R1 RESTful API extension has added the ability to perform a search for a string across all company, people, case, opportunity, lead, solution, communication, order, quote, and custom entity records.

http://{{server}}/sdata/{{install}}j/sagecrm2/$service/quickFind/getResults?query=European Time Management&SID={{sid}}

In the example above I have searched for "European Time Management". This has returned all records containing the words European + Time + Management in any text field, email field, or URL field.

Note:The words can appear in any order within a record and across more than one field.

The QuickFind endpoint uses the settings that the main Quick Find feature within the User Interface.

This is controlled under the Administration screens.

Administration | System | Quick Find.