Gapier Introduction Gapier Introduction. Gapier offers 50 tailor-made, free Actions APIs for GPTs creators. Expand your GPTs capabilities with our diverse and easily integrable APIs, designed specifically for ChatGPT users. Related AI tools WizModel 01/07/2024 000 AI API Design Chatboat 17/07/2024 000 AI API Design Perpend 22/07/2024 000 AI API Design Replicate AI 22/07/2024 000 AI API Design ReByte 22/07/2024 000 AI API Design AI Wrapping: Expert-Fast, Effortless 17/06/2024 000 AI API Design