import { CredentialTester } from './types';
/**
 * Slack bot token — call auth.test and report the team/user.
 */
export declare const slackBotTokenTester: CredentialTester;
/**
 * SMTP — open a socket, read banner, send EHLO, send QUIT. Node-only.
 */
export declare const smtpEmailTester: CredentialTester;
/**
 * Generic HTTP credential — if `fields.test_url` is set, GET it with the
 * appropriate Authorization header. Otherwise report decrypt-OK.
 */
export declare const httpEndpointTester: CredentialTester;
/**
 * Webhook — HEAD the URL and expect a 2xx/3xx.
 */
export declare const webhookUrlTester: CredentialTester;
/**
 * The default tester registry shipped with the core. Hosts can add or
 * override entries via rp.registerCredentialTester().
 */
export declare const DEFAULT_CREDENTIAL_TESTERS: Record<string, CredentialTester>;