Skip to content

CONCEPT Cited by 3 sources

BYOK (Bring Your Own Key)

BYOK (Bring-Your-Own-Key) is the posture in which a customer stores a third-party provider API key (OpenAI, Anthropic, Google, etc.) with the proxy / gateway operator — who injects it server-side on every upstream request — rather than shipping it to every client or embedding it in every application. The client authenticates to the gateway once (typically via the gateway operator's own identity substrate) and the upstream provider sees the gateway's injected key.

Why it matters

Without BYOK, an LLM key lives in every environment that needs to call the provider:

  • Developer laptops → copy-paste risk + rotation nightmare on a leak.
  • CI runners / job queues → secret-manager integration needed per environment.
  • Per-application config → multiplies the surface area of every new service.

With BYOK at a central gateway:

  • The key lives in one secrets store the gateway can reach.
  • Clients authenticate via a different substrate (SSO, Zero Trust, workload identity) — rotating the client credential is cheap and audit-logged.
  • Rotation, revocation, and provider migration happen at the gateway, not in every application.
  • Per-tenant / per-user metering and rate-limiting become centralised (the gateway knows who is calling, independent of which key it injects upstream).

Cloudflare AI Gateway instance

AI Gateway's Secrets Store + BYOK integration lets the gateway inject the real provider key (e.g. Anthropic) on behalf of the caller, identified by the gateway request path. A variant is Unified Billing, in which customers don't hold provider keys at all — Cloudflare pays the provider and charges credits from the customer's Cloudflare account.

Seen in

Last updated · 200 distilled / 1,178 read