Yomo

YoMo is an open source serverless framework for LLM function calling, built for AI agents. Developers write the functions a model can call in TypeScript or Go, and YoMo runs them as serverless tools so that agents get fast and reliable access to external capabilities. The documentation lists four main features. Functions are written in strongly typed languages, which makes the tool interface explicit. The serverless model removes the need to manage servers for each tool. Any function can be exposed as an MCP server, so MCP compatible clients can use it directly. The framework is also described as running on any model, so tools are not tied to one provider. YoMo is aimed at developers building agents or LLM backed applications who want typed, deployable tools rather than ad hoc glue code. The site is a documentation hub with a guides section and an llms.txt index for machine readable access. No pricing is published, and the framework is distributed as open source.