Merit-Systems/echo
The User Pays AI SDK
Building AI applications often means you have to choose between covering expensive API costs yourself, making users bring their own API keys, or spending weeks developing complex billing systems. Echo lets users pay for their own AI usage directly, so you can focus on building your app. It takes your existing AI prompts and models, and outputs a version where your users handle the API costs, with an optional markup for you. This is for AI application developers and product managers who want to launch AI-powered features without worrying about infrastructure or unpredictable costs.
535 stars.
Use this if you are developing an AI application and want to eliminate upfront API costs, streamline user payments, and potentially generate revenue from AI usage without building complex billing infrastructure.
Not ideal if your application does not involve external AI API calls that incur usage-based costs, or if you prefer to fully absorb all AI service costs as part of your product's flat fee.
Stars
535
Forks
47
Language
TypeScript
License
—
Category
Last pushed
Jan 13, 2026
Commits (30d)
0
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