Hello Steven,
pls check below BAPI's:
BAPI_CREDIT_ACCOUNT_REP_STATUS Copy credit status
BAPI_CREDIT_ACCOUNT_GET_STATUS Determine credit status of credit account
BAPI_CR_ACC_GETOPENITEMSSTRUCT Determination of OI structure
BAPI_CR_ACC_GETOLDESTOPENITEM Determination of oldest open item
BAPI_CR_ACC_GETHIGHESTDUNNINGL Determination of highest dunning level
BAPI_CR_ACC_GETDETAIL Master data determination
Regards,
Hitesh