Cap’n Proto RPC

Assess

Techniques

A high-performance RPC protocol that underpins Workers RPC.

Why it's here

Placed in Assess: 1 article(s) of evidence from 1 source(s), led by framework updates, with 1 in the last 30 days. Confidence 24%. Low accumulated evidence, so it defaults conservatively pending more signal.

Evidence (1)

8Cloudflare Blog·8/3/2026framework_update
Cloudflare extends Workers RPC across Python and JavaScript
Cloudflare says Workers RPC now works across Python and JavaScript, allowing Workers to call methods, pass objects, and exchange functions between languages without custom APIs or extra dependencies. The feature uses Service bindings and combines Pyodide FFI with a custom conversion layer so calls behave like native function calls with low overhead.