/**
 * HttpHandlerFactory — Runtime Fetch Proxy Builder
 *
 * Builds handler functions that proxy MCP tool calls to REST API endpoints.
 * Used by the runtime mode (`loadOpenAPI`).
 *
 * @module
 */
import type { ApiAction } from '../parser/types.js';
/** Runtime context for HTTP proxy handlers */
export interface HttpContext {
    readonly baseUrl: string;
    readonly headers?: Record<string, string>;
    readonly fetchFn?: typeof fetch;
}
/** A tool handler function */
export type HandlerFn = (ctx: HttpContext, args: Record<string, unknown>) => Promise<unknown>;
/**
 * Build a handler function for a single API action.
 *
 * The handler:
 * 1. Interpolates path params into the URL
 * 2. Appends query params
 * 3. Sends JSON body for POST/PUT/PATCH
 * 4. Returns the JSON response
 *
 * @param action - The API action to build a handler for
 * @returns A handler function
 */
export declare function buildHandler(action: ApiAction): HandlerFn;
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