import type { Tokens } from "../mcp-types";
/**
 * Checks token expiry with safety buffer.
 * Access tokens: 60s buffer to prevent mid-request expiry.
 */
export declare function isTokenExpired(tokens: Tokens, type?: "access" | "refresh"): boolean;
/**
 * Converts OAuth expires_in (seconds) to Unix timestamp (ms).
 */
export declare function calculateExpiry(expiresIn?: number): number | undefined;
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