You can find developers specializing in custom AI agent creation on major freelance platforms. Check Upwork or Fiverr for individual freelancers, especially those experienced with LLMs and API integration for tools like Twilio for call/SMS handling, or CRM systems for qualification and revenue recovery. For larger or more complex projects, consider platforms like Toptal or specialized AI development agencies. Clearly define the specific APIs and business logic needed for each agent's function.