Legacy DOM Scraping vs. Agentic Tool Calling (WebMCP)

SIMULATOR
Toggle structural changes in the website code to see why DOM scraping is brittle for AI agents, whereas WebMCP APIs remain 100% reliable.
Legacy DOM Scraping Tokens: 1,800
<div class="form-wrapper"> <h3>Contact Us</h3> <form id="c-form"> <div class="row-x"> <label>Name:</label> <input type="text" name="f_name" /> </div> <div class="row-y"> <label>Email:</label> <input type="email" name="f_email" /> </div> <button type="submit" class="btn-submit">Send</button> </form> </div>
Click 'Run Agent Task' to begin simulation.
WebMCP Agentic API Tokens: 200
// Browser Tool Contract navigator.modelContext.registerTool({ name: "submitContactForm", description: "Submit contact details.", parameters: { type: "object", properties: { userName: { type: "string" }, userEmail: { type: "string" } }, required: ["userName", "userEmail"] } });
Click 'Run Agent Task' to begin simulation.
*Note: Altering the layout simulates an e-commerce update (changing internal form field names or button classes). An AI agent using DOM scraping instantly breaks because it relies on strict text/class names, while WebMCP routes parameters directly to the underlying JavaScript function without relying on visual UI coordinates.