It is possible via the AcctAdd api (jXchange) - Account Add | Enterprise Solutions | Jack Henry Docs
We also have XML examples for that https://jackhenry.dev/open-enterprise-api-docs/enterprise-soap-api/api-reference/core-services/acctadd/acctadd/#acctadd-timedeposit
As well as FAQ - https://jackhenry.dev/open-enterprise-api-docs/enterprise-soap-api/api-reference/core-services/acctadd/acctadd/#time-deposit