/**
 * Minimal MCP JSON-RPC 2.0 Protocol Handler
 *
 * Routes initialize, tools/list, and tools/call methods.
 * No SDK, no transport layer — just a function from parsed body to response body.
 */
import type { ValidatedCaller } from '../oauth/validate.ts';
interface JsonRpcResponse {
    jsonrpc: '2.0';
    id: string | number | null;
    result?: unknown;
    error?: {
        code: number;
        message: string;
        data?: unknown;
    };
}
/**
 * Handle a single JSON-RPC request.
 *
 * Returns a JSON-RPC response object, or null for notifications (no id).
 */
export declare function handleJsonRpc(body: unknown, caller: ValidatedCaller): Promise<JsonRpcResponse | null>;
export {};
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