import type { KnownProvider } from './types.js';
/**
 * Get API key for provider from known environment variables, e.g. OPENAI_API_KEY.
 *
 * Will not return API keys for providers that require OAuth tokens.
 */
export declare function getEnvApiKey(provider: KnownProvider): string | undefined;
export declare function getEnvApiKey(provider: string): string | undefined;
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