API keys let code outside the studio talk to your agents — the embed widget on your marketing site, a webhook receiver, a one-off backfill script.
fyr_pk_…
Publishable
Safe to embed in client-side code. The widget snippet uses one of these. Scoped to public agents + visitor chat.
fyr_sk_…
Secret
Server-side only. Broader permissions — list agents, post messages, read transcripts.