Ask HN: Printing (canvas, tshirts) service via API possible?

Hi HN,

Is there any printing service (think: canvas prints, posters, or even tshirts) that one can use as a startup? The idea is that we send an SVG file over to the printing service and they can then sell the print to the customer.

I only found services where I have to create my own store and can upload my designs. However, I just want to send a single SVG file to that service so that a customer can purchase a print.

Does something like this exist? Any hints much appreciated?

Cheers