Greetings!!
# Do you have the Auction API already which you want to integrate to your existing website? If yes ,let me review the API , also please share the existing website link with me.
What are the function do you want by the API, also please let me know. I have 7+ years of experienced in Wordpress platform ,also have integrated many API's with many several websites. So highly confident to meet your requirements.
Looking forward to your reply.
Regards,
Addy