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API Sniffer Pro – Monitor, Inspect & Document APIs

Chrome extension by Avail404 · Productivity · Developer

A Chrome extension in Productivity · Developer with 119 users, barely installed.

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
119
Rating
5.0 (3 ratings)
Users, last 15 days
+3
Rating, last 30 days
Not watched long enough to say
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
+3 since 01.09
110-120 · 11 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
Rating
unchanged since 01.09
reviewsrating 5.00 · 11 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
Users
+3 since 01.09
110-120 · 11 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
Rating
unchanged since 01.09
reviewsrating 5.00 · 11 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

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once 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, 122 users between them.

  1. TabCost Avail404 · Productivity · Tools · published 2026-02-04 3 users (last published figure)

Like this one

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

  1. API Network Recorder Describes nearly the same job, smaller audience 69 users ★ 5.0
  2. API Sniffer Pro Describes nearly the same job, smaller audience 63 users ★ 1.0
  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 484 users
  5. API Inspector Pro Describes nearly the same job, smaller audience 30 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.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.