Extension Tracker

HTTP Header Spy

9,000 users Rated 3.84 from 61 ratings Last updated 5 Sep 2026

By Michiel Roos Live in the Chrome Web Store agnoocojkneiphkobpcfoaenhpjnmifb Last checked 26 Sep 2026, 21:45 UTC

The listing

What the Chrome Web Store shows, as of the last check

HTTP Header Spy enables you to inspect request- response headers and cookies right after page load with no extra clicks.Summary from the listing
Developer
Michiel Roos
Trader status
Not declared a trader under EU law
Category
Productivity › Developer Tools
First published
17 Jun 2013
Last updated
5 Sep 2026
Version
3.0.0
Size
293 KiB
Minimum Chrome
88
Languages
6 languages

English, Nederlands, español, русский, हिन्दी, 中文（中国）

Website
michielroos.com
Open in the Chrome Web Store ↗ Download the CRX from Google ↗
Users over time As shown on the Chrome Web Store

Tracking began on 26 Sep 2026. The chart appears after the second check.

Show the numbers
CheckedUsersRatingRatings
2026-09-269,0003.8461
Users, 7 days
–
needs a week of history
Users, 30 days
–
needs a month of history
Rank
#7,867
by users, of 264,253 extensions
In its category
#722
of 27,566 in Developer Tools

What changed

Every change found on a check, newest first

No changes found since tracking began on 26 Sep 2026.

What it can access

From the extension's manifest, in plain language

Every websiteIt can read and change your data on all the sites you visit.
Sites
  • http://*/*Every website
  • https://*/*Every website
Sites where it runs scripts
  • http://*/*Every website
  • https://*/*Every website
Browser features
  • activeTabThe tab you're on, only after you click the extension
  • scriptingRun scripts on sites it can reach
  • storageSave settings and data in your browser
  • tabsRead the addresses and titles of your tabs
  • webRequestWatch network requests on the sites it can reach

More from this developer

Other extensions from the same publisher account

ExtensionUsersRatingRatingsCategory
Xposer24 –– Developer Tools
All 2 extensions by Michiel Roos →

About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 26 Sep 2026, 21:45 UTC; next check around 3 Oct 2026.

How we collect the data

Cite this page

Citation
Extension Tracker. “HTTP Header Spy” (agnoocojkneiphkobpcfoaenhpjnmifb). Chrome Web Store data, last checked 2026-09-26. https://extensiontracker.com/extension/agnoocojkneiphkobpcfoaenhpjnmifb. Accessed 2026-09-28.
BibTeX
@misc{extensiontracker_agnoocojkneiphkobpcfoaenhpjnmifb,
  title   = {HTTP Header Spy (agnoocojkneiphkobpcfoaenhpjnmifb)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-26},
  url     = {https://extensiontracker.com/extension/agnoocojkneiphkobpcfoaenhpjnmifb},
  urldate = {2026-09-28}
}

The data is free to reuse under CC BY 4.0.

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