import { IncomingMessage } from "node:http";
import { AuthProvider, AuthResult } from "../types.js";
export declare const DEFAULT_API_KEY_HEADER_NAME = "X-API-Key";
/**
 * Configuration options for API key authentication
 */
export interface APIKeyConfig {
    /**
     * Valid API keys
     */
    keys: string[];
    /**
     * Name of the header containing the API key.
     * Note: Some SSE client libraries (including the standard EventSource API)
     * do not support custom headers. For these clients, the API key can also
     * be sent as a query parameter: ?api_key=<key> or ?apiKey=<key>
     * @default "X-API-Key"
     */
    headerName?: string;
}
/**
 * API key-based authentication provider
 */
export declare class APIKeyAuthProvider implements AuthProvider {
    private config;
    constructor(config: APIKeyConfig);
    /**
     * Get the number of configured API keys
     */
    getKeyCount(): number;
    /**
     * Get the configured header name
     */
    getHeaderName(): string;
    authenticate(req: IncomingMessage): Promise<boolean | AuthResult>;
    getAuthError(): {
        message: string;
        status: number;
    };
}