Modal SDKs for JavaScript and Go (alpha)

Modal has released alpha SDKs for JavaScript and Go, allowing server-side applications to call deployed Modal Functions and create secure, isolated sandboxes without using Python for client-side integration. The SDKs support workloads such as image processing, LLM inference, transcription, batch jobs, executing generated or untrusted code, running repository tests, and launching containers for one-off tasks, though deploying Modal Functions still requires Python. Users can authenticate through the Modal CLI or environment variables and install the packages through npm or Go modules, with examples demonstrating remote function calls and sandbox command execution. The initial release supports JSON-like and byte data types but lacks advanced capabilities including map and spawn modes, sandbox tunnels, volumes, and container lifecycle controls, which are planned for later. Modal describes the libraries as lightweight and consistent, notes successful testing at 10,000 concurrent sandboxes, and cautions that the alpha APIs and naming conventions may change as development continues.

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