Fixed
Fixed 400 errors when reading market orders with an ISV token
November 5th, 2026 by ReadMe API
Availability: Sandbox since November 4, 2026 · Production since November 4, 2026
Reading market orders with an ISV-level token no longer fails with a 400 error (Invalid format for parameter X-ProphetX-User). This affected both of these endpoints in sandbox and production:
GET /private/v1/market-orders/{refId}GET /private/v1/market-orders?userId=
Both calls now return 200 with an ISV token. You don't need to change anything in your integration. If you added a workaround for these errors, you can remove it.
See Market Orders and Authentication for details.