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An agent key (ak_ntl_*) is a credential bound to one Agent. A request made with it is that agent. Give it to an agent runtime; it carries the same verified binding as an agent-scoped MCP OAuth grant. An API key is the party-wide counterpart: it acts as the party and cannot act as an agent. An agent key is scoped to its agent, nothing else.

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Issuing

Agent keys can only be issued, rotated, or revoked from a user session, so a leaked party key can’t mint agent identities.

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Rotation and revocation

Rotating issues a replacement and keeps the old key valid for a grace period you choose, up to 24 hours, so a running agent switches over without downtime. Revoking invalidates a key immediately, with no replacement. Either way, the secret is shown once.