import type { Credentials } from "./credentials.js";
export type KeyProbe = {
    kind: "accepted";
} | {
    kind: "rejected";
    message: string;
} | {
    kind: "unknown";
};
export type ProbeTarget = {
    url: string;
    name: string;
    method: "GET" | "POST";
};
/**
 * One request, no tokens spent: only the answer's status decides, and only an
 * auth refusal is read as a bad key. A provider outage or a moved route says
 * nothing about the credential and must never be reported as one.
 */
export declare const probeKey: (creds: Exclude<Credentials, {
    kind: "none";
}>, target?: ProbeTarget) => Promise<KeyProbe>;
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