Hello, I cannot tell if this is true or not, since I have not been able to really test the ability of Claude AI to code. I am looking for a web API I could use

Hello, I cannot tell if this is true or not, since I have not been able to really test the ability of Claude AI to code. I am looking for a web API I could use with CURL, and limited "public/testing" API keys. Anyone? I am very interested in Claude code to test its ability to code assembly (x86_64/RISC-V) and to assist the ports of c++ code to plain and simple C (I read something from HN about this which seems to be promising).