Promptium MCP Server

Promptium – LLM‑Driven UI Automation for Mobile Apps

Promptium is a Java‑based server that bridges large language models (LLMs) with Appium, the popular open‑source framework for automating mobile user interfaces. By exposing an MCP (Model Context Protocol) endpoint, it lets AI assistants such as Claude drive real devices or simulators using natural‑language commands. The server interprets user prompts, translates them into Appium actions (tap, swipe, scroll, screenshot), and returns contextual feedback, turning an ordinary test script into a conversational testing experience.

The core problem Promptium solves is the disconnect between human intent and automated test scripts. Traditional mobile automation requires explicit code for every UI interaction, which is brittle and hard to maintain as apps evolve. Promptium allows developers and QA engineers to describe the desired outcome in plain English—“tap the login button,” “scroll to the bottom of the settings page,” or “take a screenshot after signing in”—and lets the LLM understand, generate, and execute the necessary Appium commands. This reduces the need for manual script writing, speeds up test creation, and makes automation more accessible to non‑technical stakeholders.

Key capabilities include:

• Device Interaction: Tap, swipe/scroll, and screenshot capture on both local simulators and physical iOS devices.
• LLM Integration: The server parses natural language, maps it to Appium actions, and can even interpret complex sequences or conditional flows.
• MCP Compatibility: By adhering to the MCP spec, Promptium can be plugged into any LLM client that supports the protocol (currently Claude Desktop), enabling seamless context‑aware communication.
• Java Ecosystem: Built on Java 23+ for stability and performance, it fits naturally into existing CI/CD pipelines and test frameworks that already rely on Java or JVM languages.

Real‑world use cases are plentiful. QA teams can rapidly prototype exploratory tests, developers can automate regression checks with minimal code, and product managers can verify UI flows through conversational prompts during demos. In continuous integration environments, Promptium can be invoked as a service that receives test scenarios from a higher‑level orchestrator, executes them on a device farm, and returns pass/fail status along with screenshots for audit.

What sets Promptium apart is its combination of LLM intelligence and proven mobile automation tooling. It removes the boilerplate that traditionally hampers rapid test development while preserving the robustness of Appium’s command set. The result is a flexible, developer‑friendly platform that empowers AI assistants to act as true test collaborators, turning natural language into reliable, repeatable mobile UI interactions.