WebMCP Inspector y DevTools

Name: WebMCP Inspector y DevTools
Author: Google Chrome Labs

Beta

A Chrome extension that checks whether a page's WebMCP tools are exposed correctly, plus the DevTools WebMCP pane that logs every call.

Vendor

Google Chrome Labs

Status

Beta

Levels covered

Level 3: Operable (Partial coverage)

Platforms

Any

Protocols

WebMCP

Pricing

Open source

Effort

Medium

Regions

Global

For business

You check that your store's tools exist, have the expected schema and respond, before an agent fails using them.

For technical teams

The repository adds WebMCP Evals, a CLI that tests whether an agent calls the right tool for each request. The DevTools pane shows status, input and output of every invocation.

Official site: WebMCP Inspector y DevTools

Alternatives

We know of no comparable alternatives.

Sources

Verified on 2026-11-08

Verification note: Apache-2.0. The repository says «not an officially supported Google product»: beta per the register rule. The pages give no install steps or Chrome version: effort 2. The DevTools pane declares no status or version.