WebMCP DevTools — Tool Inspector & Auditor icon

WebMCP DevTools — Tool Inspector & Auditor

by postantegames · Developer Tools
Manifest V3 Free
View in Chrome Web Store Data as of 16 Oct 2026

Inspect, audit and export WebMCP tools. Readiness scoring, performance profiling, code generation. By Wolvane.

Users
69
−4 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#96K
#80K among extensions
Version
1.2.0
updated 26 Sep 2026

Users

monthly, 6 months
03877Apr 2026Aug 2026Oct 2026
Latest, 16 Oct 2026: 69 usersMove the mouse over the chart for any month

Ratings count

monthly, 6 months
001Apr 2026Aug 2026Oct 2026
Latest, 16 Oct 2026: 1 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About WebMCP DevTools — Tool Inspector & Auditor

WebMCP DevTools — inspect, test, audit and export the WebMCP tools a website exposes to AI agents. WebMCP (document.modelContext) lets websites register functions as "tools" for AI agents. This side panel shows you exactly what a page registers and helps you make it agent-ready. 🔧 Tool Inspector — Auto-detects imperative (registerTool) and declarative (<form toolname>) tools on any page. View schemas, parameters, descriptions and tool annotations (read-only, consequential, untrusted output) at a glance. ▶️ Execute — Run any tool from the panel with an auto-generated form, see results with JSON highlighting, and keep an execution history. 📊 Readiness Audit — 0-100 score for descriptions, input schemas, naming, titles, required fields and per-property docs, with concrete recommendations and an AI fix prompt you can paste into your assistant. ⚡ Performance — Per-tool latency (avg, P95), success/failure rate, slow-tool warnings and a benchmark runner for safe read-only tools. 🛡️ Security Checklist — Loose schemas (additionalProperties), high-risk actions without a consequential hint, sensitive parameters (passwords, keys), missing types and URL exposure. 📤 Export — Copy or download tool definitions as JSON schemas ready for LLM function calling, or as code snippets (cURL, TypeScript, Python). Audit and security reports export as Markdown or JSON. 🌐 Directory & Showcase — Keeps a local list of sites where you found tools, plus a curated showcase of public sites and official demos to try right away. 🌍 English and Turkish UI, dark/light/system themes. ⚙️ Requirements • Chrome 153 or later • Enable WebMCP: chrome://flags/#enable-webmcp-testing → Enabled → Relaunch (or visit a site enrolled in the WebMCP origin trial) 🔒 Privacy — Everything runs locally. No data collection, no external network requests. Built with ❤️ by Wolvane — wolvane.com Contact: info@wolvane.com

Growth

WindowUsersChangeRatingsRating
7 days−5−6.8%00.00
30 days−4−5.5%00.00
6 months+69–+1+5.00

Version history

3 versions recorded
1.2.026 Sep 2026
1.1.025 Sep 2026
1.0.018 Apr 2026

Details

Category
Developer Tools
First seen
18 Apr 2026
Size
111 KB
Languages
en, tr
Pricing
Free
Privacy policy
wolvane.com
Support
wolvane.com
Extension ID
mkoppddbmiankfpbapbaodmamhocbbhi

Permissions and risk

Moderate riskimpact 3, likelihood 2
Permissions
activeTabscriptingsidePaneltabsstoragedownloads
Site access
<all_urls>
Can read and change data on every website you visit.

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