Client API Stability and Ergonomics
Modal SDKs for JavaScript and Go (alpha)

Modal SDKs for JavaScript and Go (alpha)

4/30/2025

What this post added

Introduced alpha versions of official Modal SDKs for JavaScript and Go. These SDKs allow developers to call deployed Modal Functions and create/interact with isolated sandboxes from server-side JavaScript (Node, Deno, Bun) and Go code. The SDKs support calling functions with JSON-like or `bytes` data types and creating sandboxes for executing arbitrary code, running untrusted scripts, checking out Git repos, and running one-off jobs. Authentication can be done via CLI setup or environment variables. The post notes that deployment of Modal Functions still requires Python and that advanced function calling modes, sandbox tunnels, volumes, and container lifecycle management are coming soon.

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