Universal Tool Calling Protocol is described as 'The Universal Tool Calling Protocol (UTCP) is an open standard, as an alternative to the MCP, that describes how to call existing tools rather than proxying those calls through a new server. After discovery, the agent speaks directly to the tool’s native endpoint (HTTP, gRPC' and is an app in the ai tools & services category. There are four alternatives to Universal Tool Calling Protocol for a variety of platforms, including Self-Hosted, SaaS, Web-based, BSD and Mac apps. The best Universal Tool Calling Protocol alternative is Model Context Protocol, which is both free and Open Source. Other great apps like Universal Tool Calling Protocol are PromptDesk, NLUX and Laminar AI.