SFDC Core and Utility Services are documented here
The OIC SFDC adapter supports a subset of these -
Convert Lead - Converts a Lead into an Account, Contact, or (optionally) an Opportunity.
Get Deleted - Retrieves the IDs of individual objects of the specified object that have been deleted since the specified time
Get Server Timestamp - Retrieves the current system timestamp (Coordinated Universal Time (UTC) time zone) from the API
Get Updated - Retrieves the list of individual records that have been updated (added or changed) within the given timespan for the specified object.
Use this for data replication applications to retrieve a set of IDs for objects of the specified object that have been created or updated within the specified timespan.
Get User Info - Retrieves personal information for the user associated with the current session, e.g. full name, email etc.
Merge - Combines up to 3 records of the same type into 1 record. The input is an array of MergeRequest elements, each of which specifies the records to combine e.g. merging contacts or leads.
Process - Submits an array of approval process instances for approval, or processes an array of approval process instances to be approved, rejected, or removed.
Send Email - Immediately sends an email message - counts against the daily email limit.
Undelete - Undeletes records from the Recycle Bin.
Details on the Recycle Bin here
Now to an example -
Convert one of our Leads to an Account and Contact
Here is the OIC invoke configuration -
Here is the mapping -
The request includes the leadId of my contact, Jimmy.
convertedStatus has been hard-coded as follows -
The response mapping -
I have mapped accountId, contactId, success from Source to the Target fields.
I test via Postman -
I validate in SFDC -
Jimmy is now a Contact -
The Hare of the Dog Pub is now an Account -
Note also that an Opportunity has been created for this account.