We have this API for SNOMED CT Codes -

https://uatamrit.piramalswasthya.org/hwc-api/snomed/getSnomedCTRecordList 

Request-

{"term":"fev","pageNo":0}

Response-
{
    "data": {
        "sctMaster": [
           

{                 "conceptID": "7520000",                 "term": "Fever of unknown origin"             }

        ],
        "pageCount": 1
    },
    "statusCode": 200,
    "errorMessage": "Success",
    "status": "Success"
}

 

But this API works in real-time when the network is available.
For our MHWC App to work offline, we will need a downsync API for this SNOMED CT data.