Cardmarket Chart Extension by Matras

Replaces Cardmarket Charts with better Charts.

As of June 2026, Cardmarket Chart Extension by Matras has 31 users in the Shopping category.

Shopping

Chrome Web Store ↗.crx

Users+210.0%

Rating0%

—

— reviews

Reviews0%

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Version

0.2.5

Manifest V3

History

8 snapshots

Tracking since Apr 1, 2026.

View as table

Date	Users	Rating	Reviews	Version
Apr 1, 2026	10	—	—	0.2.5
Apr 17, 2026	12	—	—	0.2.5
Apr 22, 2026	18	—	—	0.2.5
Apr 27, 2026	20	—	—	0.2.5
May 7, 2026	22	—	—	0.2.5
May 14, 2026	23	—	—	0.2.5
May 23, 2026	27	—	—	0.2.5
Jun 2, 2026	30	—	—	0.2.5
Now	31	—	—	0.2.5

Permissions & access

Permissions: storagescripting
Host access: https://www.cardmarket.com/*, https://cmce-api.timaschwabe.workers.dev/*

Screenshots

Cardmarket Chart Extension by Matras screenshot 1

Cardmarket Chart Extension by Matras screenshot 2

Cardmarket Chart Extension by Matras screenshot 3

Cardmarket Chart Extension by Matras screenshot 4

About

This extension replaces the default Cardmarket chart with improved price and availability charts that become more accurate and more useful as the community grows.

What does it show?

📈 7-day average price (AVG7) for smoother price trends

📦 Available item count over time

⏱️ Multiple time ranges: 30 days, 1 year, max


Historical data on Cardmarket is limited.
This extension improves charts by collecting anonymized, aggregated market data contributed by users.
➡️ The more users participate, the better and more complete the charts become for everyone.


Optional features (recommended)

✅ Community data sharing – helps build better historical charts
✅ Random fetch – automatically collects live market data in the background while browsing
Both features are opt-in and can be enabled or disabled at any time.


Privacy-friendly by design

-No accounts required
-No tracking
-No personal data collected
-Only product-related numeric data (prices and availability)