Currently, your API is filtering down shipping quotes/results and returning what it deems the cheapest/fastest/best value.
This is great but a lot of our customers want to choose a specific carrier for their own personal reasons i.e. UPS drivers in their area always come early before USPS and they prefer that or vice versa.
Or they might be happy to pay an extra $3 for 3-day shipping VS 2-day which would have cost them +$7 over the ground. However, they can't as these options are deemed too close and stripped from the returned results.
Before moving to shipstation we could allow the customer to select which they wanted from the full list.
Can you PLEASE include an option in the backend to return ALL results instead of your filtered list.