I want customers to upload .STL files, and get an instant quote

[selleranna]

I want customers to upload .STL files, choose materials, and get an instant quote. Aside from Shop3D or Shapeways. Please let me know how I can do that. I have been stuck in this matter from over a week

[selleranna]

I want my customers to upload a file (.stl, .obj [3D files]), Choose the material and get a quote accordingly. For example https://imprimakers.com/en/producto/3d-printing-calculator/#tabla-materiales

I tried out Shop3D but nothing worked, When I used Shapeways I couldn't connect the API to Shopify. (I am not a developer so I don't have much knowledge of it)