question Error: "Invalid Quantity value" when ordering a catalog item using REST API Explorer in Community Central forum

Error: "Invalid Quantity value" when ordering a catalog item using REST API Explorer

Sreekar ML — Fri, 25 Jul 2025 05:59:58 GMT

Hi Community,

I'm trying to order a catalog item using the REST API Explorer in ServiceNow, but I'm encountering the following error:

{
"error": {
"message": "Invalid Quantity value",
"detail": ""
},
"status": "failure"
}

I’ve replaced {sys_id} with the actual sys_id of the catalog item I’m trying to order.

Need help -

Am I using the correct approach to order a catalog item via REST API?

What could be causing the "Invalid Quantity value" error?

debendudas — Fri, 25 Jul 2025 06:12:42 GMT

If this solution helps you then, mark it as accepted solution ‌‌✔️ and give thumbs up 👍!

Rafał Rataj — Wed, 15 Oct 2025 10:44:37 GMT

the message may indicate you are missing the quantity, in that case you can try to add it in the payload

{

"quantity": 1,

"variables": {.....

on other hand you can try the submit_producer method

also it may indicate user is missing permission to submit the item

you can also try to add to your integration user the rest_api_explorer role

and try to execute the API on that user, im the REST API Explorer, if it works then it should work also in Postman or on the integration

the error comes from script include CatalogSaveUtility