Edge Computing with Cloudflare Workers
Workers RPC now works across Python and JavaScript

Workers RPC now works across Python and JavaScript

8/3/2026 · Dominik Picheta, Gyeongjae Choi

What this post added

Introduced cross-language RPC support for Cloudflare Workers, enabling seamless communication between JavaScript and Python Workers. This is achieved by leveraging Pyodide's FFI for standard type conversions and a custom workers-runtime-sdk package to handle Cloudflare Workers-specific objects. The system supports passing structured cloneable types, functions, and objects, with near-zero performance overhead.

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