# OnHand ## Get product external availability by part number - [POST /ProductService.svc/rest/GetExternalProductOnHandByPartNo](https://docs.norce.io/api-reference-storm/stormapi/productservice/openapi/onhand/getexternalproductonhandbypartno.md): Checks the actual on hand status in the customers back end system. ## Get product external availability by id - [POST /ProductService.svc/rest/GetExternalProductOnHandByProduct](https://docs.norce.io/api-reference-storm/stormapi/productservice/openapi/onhand/getexternalproductonhandbyproduct.md): Checks the actual on hand status in the customers back end system. ## Get product availability by part number - [POST /ProductService.svc/rest/GetProductOnHandByPartNo](https://docs.norce.io/api-reference-storm/stormapi/productservice/openapi/onhand/getproductonhandbypartno.md) ## Get product availability by id - [POST /ProductService.svc/rest/GetProductOnHandByProduct](https://docs.norce.io/api-reference-storm/stormapi/productservice/openapi/onhand/getproductonhandbyproduct.md)