free-ai

FreeTheAi (Free The AI): free OpenAI-compatible AI API with 50+ models, Discord key signup, streaming, tools, images, Messages, and Responses. No credit card. Maintained by Free-The-Ai on GitHub, where it has earned 826 stars from the community.

It's actively developed around discord-bot, free-api, openai-compatible, and is a solid reference for anyone building with these tools.