[Edited] I think what you're looking for is this 0x API LiquidityTaker Integration Request form: https://docs.google.com/forms/d/e/1FAIpQLSewmRJaxRCgOohgU5CkONV3aaLI9YGwYkJ1jnPYtOxhEtojlw/viewformhttps://docs.google.com/forms/d/e/1FAIpQLSdUevfVTDbqnr2z7jBbuS-wMLu0wW9aHL0WZYb5B30TWFynhg/viewform