import { SentlyError } from "../core/errors.js";
import type { MailOptions, SendResult, Transport, VerifyResult } from "../core/types.js";
/** Plunk HTTP API configuration. */
export interface PlunkConfig {
    /** Plunk API key for Bearer authentication. */
    apiKey: string;
}
/** Error thrown when the Plunk API returns a non-success response. */
export declare class PlunkError extends SentlyError {
    readonly statusCode: number;
    readonly apiError: unknown;
    /** Creates a Plunk API error with status code. */
    constructor(message: string, statusCode: number, apiError: unknown);
}
/**
 * Plunk HTTP API transport.
 */
export declare class PlunkTransport implements Transport {
    readonly provider = "plunk";
    private readonly apiKey;
    /** Creates a Plunk transport with the given API key. */
    constructor(config: PlunkConfig);
    /** Sends an email via the Plunk HTTP API (one request per recipient). */
    send(options: MailOptions): Promise<SendResult>;
    /**
     * Returns success without a network call — Plunk has no documented verify endpoint.
     */
    verify(): Promise<VerifyResult>;
}