Inspect & augment WebMCP tools on any page
Discover, inspect, and debug both declarative (HTML form) and imperative (JS API) tools exposed via the WebMCP spec. Execute tools, augment forms, and test with Chrome's on-device Gemini Nano model — all in real time.
Open InspectorTool Discovery
Declarative Tools HTML
Scans pages for HTML forms annotated with WebMCP attributes like toolname, tooldescription, and parameter metadata.
Imperative Tools JS API
Detects tools registered via the navigator.modelContext JavaScript API, with full input schema support.
Augment Forms
Turn any plain HTML form into a WebMCP tool by adding metadata. Overrides are saved per URL and restored automatically.
Inspect & Validate
View generated JSON schemas, validate WebMCP attributes, and highlight forms directly on the target page.
Debugging
Execute Tools
Call any discovered tool directly from the inspector with parameter inputs, and view results in real time.
On-Device AI Gemini Nano
Debug tools with Chrome's built-in Gemini Nano model. The on-device agent can autonomously discover and call tools.
Activity Log
Real-time history of tool discovery, augmentation, execution results, and tab navigation events.
Environment
Live Preview
See the target page rendered in a sandboxed Webfuse session alongside your edits and tool interactions.
Works on Any Page
Enter any URL to inspect it. No browser extension required — everything runs through a secure Webfuse session.
Webfuse