JK Index
Grading challenges & TCG market intelligence
1 ratings3.72
Saves19
CategoryFinance
PlatformWeb
PricingFree trial
JK Index is a platform for trading card collectors to track and research card prices, sold history, and grading outcomes for Pokémon, One Piece, and Riftbound cards. It features grading challenge games, prediction markets for card grades, collection tracking, and a beta marketplace for browsing listings with real pricing data.
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Information
CategoryFinance
PlatformsWeb
PricingFree trial
AccountNot confirmed
ListedSeptember 2026
WebVisit
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Mobile PageSpeed
Automated checks of the public website by Google Lighthouse 13.5.0. Scores can vary between runs.
Checked Oct 20, 2026
Test this website on PageSpeedWebsite checks refresh automatically each week.
- Performance
- 84 out of 100, Needs improvement
- Accessibility
- 96 out of 100, Good
- Best Practices
- 100 out of 100, Good
- SEO
- 100 out of 100, Good
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Reddit:SideProject19 source points · 6 comments