How AI is applied across API Evangelist and APIs.io. Read my AI disclosure →
API Evangelist API Evangelist
Discovery
Learnings
Guidance
Toolbox
Alignment
API Evangelist LLC

Sandbox Place Order V3 returning HTTP 400 with empty response

calendar_today September 11, 2026 person @ANAND_56835509 ANAND domain upstox

Thank you, but I have already reviewed the Sandbox API Guide. My issue is that the documented V3 endpoint returns HTTP 400 with an empty body, while the older sandbox hostname does not resolve. Please specifically confirm: The currently operational Place Order V3 sandbox endpoint.

open_in_new Read original post