/**
 * Standalone agent discovery and calling helpers.
 *
 * These functions do not require a wallet or x402 payment — discovery and
 * calling are free read operations (from the registry's perspective).
 * Agent-to-agent payment happens at the agent's own endpoint.
 */
import type { Project } from "./ProjectsClient.js";
/**
 * Search for agents on the INKD registry by capability or keyword.
 *
 * Hits GET /v1/search/projects?q=...&isAgent=true
 * No wallet required — discovery is free.
 *
 * @example
 * ```ts
 * import { searchAgents } from "@inkd/sdk";
 *
 * const agents = await searchAgents("text summarization");
 * console.log(agents[0].agentEndpoint); // https://summarizer.example.com/v1
 * ```
 */
export declare function searchAgents(query: string, options?: {
    limit?: number;
    apiUrl?: string;
}): Promise<Project[]>;
/**
 * Call a registered agent by INKD project ID.
 *
 * Fetches the project's `agentEndpoint` from the registry, then POSTs
 * `input` to that endpoint. Returns the parsed JSON response.
 *
 * @example
 * ```ts
 * import { callAgent } from "@inkd/sdk";
 *
 * const result = await callAgent(42, { text: "Summarize this", maxLength: 100 });
 * console.log(result); // { summary: "..." }
 * ```
 */
export declare function callAgent(projectId: number | string, input: Record<string, unknown>, options?: {
    apiUrl?: string;
}): Promise<unknown>;
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