Response field key removed

What changed

Reads of this field return undefined, and the failure surfaces wherever that value is used rather than at the call.

Affects calls_turn_key_with_key reachable from 1 operation.

Who is affected

Code that reads Cloudflare's calls_turn_key_with_key objects, used by 1 Cloudflare operation.

Before and after

Code that breaks

// response.key is now undefined
const key = response.key;

Based on Cloudflare’s published API specification. How severity is decided.