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WebMCP DevTools — Tool Inspector & Auditor

Chrome extension by postantegames · Productivity · Developer

A Chrome extension in Productivity · Developer with 81 users, barely installed. Audience over the last 30 days: +4.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 5 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
81
Rating
5.0 (1 ratings)
Users, last 30 days
+4
Rating, last 30 days
Steady over 30 days
Version
1.2.0
Updated in the store
2026-09-26
Published
2026-04-18
Manifest
V3
Browser access
6 permissions, 1 site pattern

How it has moved

Users
+4 since 02.10
68-82 · 16 readings
  1. 2026-10-0472
  2. 2026-10-0870
  3. 2026-10-0974
  4. 2026-10-1069
  5. 2026-10-1370
  6. 2026-10-1668
  7. 2026-10-1868
  8. 2026-10-1969
  9. 2026-10-2172
  10. 2026-10-2271
  11. 2026-10-2376
  12. 2026-10-2481
  13. 2026-10-2582
  14. 2026-10-2781
  15. 2026-10-2981
  16. 2026-10-3181
Rating
unchanged since 02.10
reviewsrating 5.00 · 16 readings
  1. 2026-10-04reviews1rating5.00
  2. 2026-10-08reviews1rating5.00
  3. 2026-10-09reviews1rating5.00
  4. 2026-10-10reviews1rating5.00
  5. 2026-10-13reviews1rating5.00
  6. 2026-10-16reviews1rating5.00
  7. 2026-10-18reviews1rating5.00
  8. 2026-10-19reviews1rating5.00
  9. 2026-10-21reviews1rating5.00
  10. 2026-10-22reviews1rating5.00
  11. 2026-10-23reviews1rating5.00
  12. 2026-10-24reviews1rating5.00
  13. 2026-10-25reviews1rating5.00
  14. 2026-10-27reviews1rating5.00
  15. 2026-10-29reviews1rating5.00
  16. 2026-10-31reviews1rating5.00
Users
+14 since 01.09
67-82 · 30 readings
2026-09-25: released 1.1.02026-09-26: released 1.2.0
  1. 2026-09-0167
  2. 2026-09-0272
  3. 2026-09-0470
  4. 2026-09-0671
  5. 2026-09-0772
  6. 2026-09-0974
  7. 2026-09-1072
  8. 2026-09-1374
  9. 2026-09-1573
  10. 2026-09-1774
  11. 2026-09-2075
  12. 2026-09-2577released 1.1.0
  13. 2026-09-2678released 1.2.0
  14. 2026-09-2877
  15. 2026-10-0472
  16. 2026-10-0870
  17. 2026-10-0974
  18. 2026-10-1069
  19. 2026-10-1370
  20. 2026-10-1668
  21. 2026-10-1868
  22. 2026-10-1969
  23. 2026-10-2172
  24. 2026-10-2271
  25. 2026-10-2376
  26. 2026-10-2481
  27. 2026-10-2582
  28. 2026-10-2781
  29. 2026-10-2981
  30. 2026-10-3181
Rating
unchanged since 01.09
reviewsrating 5.00 · 30 readings
2026-09-25: released 1.1.02026-09-26: released 1.2.0
  1. 2026-09-01reviews1rating5.00
  2. 2026-09-02reviews1rating5.00
  3. 2026-09-04reviews1rating5.00
  4. 2026-09-06reviews1rating5.00
  5. 2026-09-07reviews1rating5.00
  6. 2026-09-09reviews1rating5.00
  7. 2026-09-10reviews1rating5.00
  8. 2026-09-13reviews1rating5.00
  9. 2026-09-15reviews1rating5.00
  10. 2026-09-17reviews1rating5.00
  11. 2026-09-20reviews1rating5.00
  12. 2026-09-25reviews1rating5.00released 1.1.0
  13. 2026-09-26reviews1rating5.00released 1.2.0
  14. 2026-09-28reviews1rating5.00
  15. 2026-10-04reviews1rating5.00
  16. 2026-10-08reviews1rating5.00
  17. 2026-10-09reviews1rating5.00
  18. 2026-10-10reviews1rating5.00
  19. 2026-10-13reviews1rating5.00
  20. 2026-10-16reviews1rating5.00
  21. 2026-10-18reviews1rating5.00
  22. 2026-10-19reviews1rating5.00
  23. 2026-10-21reviews1rating5.00
  24. 2026-10-22reviews1rating5.00
  25. 2026-10-23reviews1rating5.00
  26. 2026-10-24reviews1rating5.00
  27. 2026-10-25reviews1rating5.00
  28. 2026-10-27reviews1rating5.00
  29. 2026-10-29reviews1rating5.00
  30. 2026-10-31reviews1rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Every site you visit. This extension can read and change the content of any page you open.

  • See the address and title of every tab you have open tabs
  • Manage your downloads downloads
  • Run its own code on the pages it can access scripting
Show the remaining 3
  • Act on the current tab, but only after you click it activeTab
  • Open a panel beside the page sidePanel
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 1.2.0
  2. Version 1.1.0

What changed recently

  1. Package size changed
  2. Store description rewritten
  3. Released version 1.2.0 (was 1.1.0)
Show the remaining 3
  1. Package size changed
  2. Store description rewritten
  3. Released version 1.1.0 (was 1.0.0)

The publisher

postantegames.

Like this one

Listings the catalog judges closest in what they say they do.

  1. WebMCP - Developer Tools Describes nearly the same job, smaller audience 76 users
  2. WebMCP Lens Describes nearly the same job, smaller audience 10 users ★ 5.0
  3. WebMCP Inspector Describes nearly the same job, smaller audience 12 users ★ 4.5
  4. WebMCP Simple Agent Describes nearly the same job, smaller audience 8 users
  5. WebMCP Validator - AI Agent Readiness Describes nearly the same job, smaller audience 103 users ★ 5.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

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Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/mkoppddbmiankfpbapbaodmamhocbbhi/badge.svg)](https://extops.dev/extensions/mkoppddbmiankfpbapbaodmamhocbbhi)

HTML

<a href="https://extops.dev/extensions/mkoppddbmiankfpbapbaodmamhocbbhi"><img src="https://extops.dev/extensions/mkoppddbmiankfpbapbaodmamhocbbhi/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-10-29. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built