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API Sniffer Pro – Monitor, Inspect & Document APIs

Chrome extension by Avail404 · Productivity · Developer

A Chrome extension in Productivity · Developer with 130 users, barely installed. Audience over the last 30 days: +9.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 5 screenshots

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

Users
130
Rating
5.0 (3 ratings)
Users, last 30 days
+9
Rating, last 30 days
Steady over 30 days
Version
1.4.0
Updated in the store
2026-03-22
Published
2025-11-21
Manifest
V3
Browser access
4 permissions

How it has moved

Users
+9 since 30.09
121-130 · 16 readings
  1. 2026-10-04125
  2. 2026-10-08126
  3. 2026-10-10124
  4. 2026-10-11125
  5. 2026-10-13126
  6. 2026-10-16128
  7. 2026-10-18127
  8. 2026-10-19128
  9. 2026-10-21127
  10. 2026-10-22124
  11. 2026-10-23125
  12. 2026-10-24126
  13. 2026-10-25127
  14. 2026-10-27129
  15. 2026-10-29130
  16. 2026-10-30130
Rating
unchanged since 30.09
reviewsrating 5.00 · 16 readings
  1. 2026-10-04reviews3rating5.00
  2. 2026-10-08reviews3rating5.00
  3. 2026-10-10reviews3rating5.00
  4. 2026-10-11reviews3rating5.00
  5. 2026-10-13reviews3rating5.00
  6. 2026-10-16reviews3rating5.00
  7. 2026-10-18reviews3rating5.00
  8. 2026-10-19reviews3rating5.00
  9. 2026-10-21reviews3rating5.00
  10. 2026-10-22reviews3rating5.00
  11. 2026-10-23reviews3rating5.00
  12. 2026-10-24reviews3rating5.00
  13. 2026-10-25reviews3rating5.00
  14. 2026-10-27reviews3rating5.00
  15. 2026-10-29reviews3rating5.00
  16. 2026-10-30reviews3rating5.00
Users
+14 since 01.09
110-130 · 32 readings
  1. 2026-09-01116
  2. 2026-09-02120
  3. 2026-09-03115
  4. 2026-09-04113
  5. 2026-09-05111
  6. 2026-09-06110
  7. 2026-09-07111
  8. 2026-09-08117
  9. 2026-09-10119
  10. 2026-09-13118
  11. 2026-09-15119
  12. 2026-09-16120
  13. 2026-09-21125
  14. 2026-09-25124
  15. 2026-09-26122
  16. 2026-09-28121
  17. 2026-10-04125
  18. 2026-10-08126
  19. 2026-10-10124
  20. 2026-10-11125
  21. 2026-10-13126
  22. 2026-10-16128
  23. 2026-10-18127
  24. 2026-10-19128
  25. 2026-10-21127
  26. 2026-10-22124
  27. 2026-10-23125
  28. 2026-10-24126
  29. 2026-10-25127
  30. 2026-10-27129
  31. 2026-10-29130
  32. 2026-10-30130
Rating
unchanged since 01.09
reviewsrating 5.00 · 32 readings
  1. 2026-09-01reviews3rating5.00
  2. 2026-09-02reviews3rating5.00
  3. 2026-09-03reviews3rating5.00
  4. 2026-09-04reviews3rating5.00
  5. 2026-09-05reviews3rating5.00
  6. 2026-09-06reviews3rating5.00
  7. 2026-09-07reviews3rating5.00
  8. 2026-09-08reviews3rating5.00
  9. 2026-09-10reviews3rating5.00
  10. 2026-09-13reviews3rating5.00
  11. 2026-09-15reviews3rating5.00
  12. 2026-09-16reviews3rating5.00
  13. 2026-09-21reviews3rating5.00
  14. 2026-09-25reviews3rating5.00
  15. 2026-09-26reviews3rating5.00
  16. 2026-09-28reviews3rating5.00
  17. 2026-10-04reviews3rating5.00
  18. 2026-10-08reviews3rating5.00
  19. 2026-10-10reviews3rating5.00
  20. 2026-10-11reviews3rating5.00
  21. 2026-10-13reviews3rating5.00
  22. 2026-10-16reviews3rating5.00
  23. 2026-10-18reviews3rating5.00
  24. 2026-10-19reviews3rating5.00
  25. 2026-10-21reviews3rating5.00
  26. 2026-10-22reviews3rating5.00
  27. 2026-10-23reviews3rating5.00
  28. 2026-10-24reviews3rating5.00
  29. 2026-10-25reviews3rating5.00
  30. 2026-10-27reviews3rating5.00
  31. 2026-10-29reviews3rating5.00
  32. 2026-10-30reviews3rating5.00

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

No site access is declared in the manifest, so it cannot read the pages you open on its own.

  • See the address and title of every tab you have open tabs
  • Watch the network requests your browser makes webRequest
  • Act on the current tab, but only after you click it activeTab
Show the remaining 1
  • Store data in your browser storage

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

Avail404 publishes 2 listings we track, 134 users between them.

  1. TabCost Avail404 · Productivity · Tools · published 2026-02-04 4 users

Like this one

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

  1. API Sniffer Pro Describes nearly the same job, smaller audience 63 users ★ 1.0
  2. API Network Recorder Describes nearly the same job, smaller audience 99 users ★ 5.0
  3. API Request Sniffer Describes nearly the same job, smaller audience 16 users ★ 4.6
  4. API Catcher Describes nearly the same job, smaller audience 532 users
  5. API Inspector Pro Describes nearly the same job, smaller audience 44 users ★ 4.0

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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The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

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

HTML

<a href="https://extops.dev/extensions/nmjlnpdkejlggndlhalhiegphjlbceni"><img src="https://extops.dev/extensions/nmjlnpdkejlggndlhalhiegphjlbceni/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