Track TCG prices, manage your collection, and follow raw-card markets before the grade.
Search Pokémon, One Piece, and Riftbound cards for sold listings, market price, and graded history — then track your collection, browse marketplace listings, and explore Before the Slab practice markets.
Portfolio tracking is live. Marketplace beta is live. Before the Slab practice markets are in preview.
Search the index
Enter at least two characters, then press Enter or tap Open card search.
Supported TCGs
3
Pokémon, One Piece, Riftbound
Portfolio
Live
Collection & value tracking
Marketplace
Beta
Supported cards · approved sellers
Before the Slab
Preview
Simulated practice markets
BEFORE THE SLAB
Practice markets for the moment before a card is graded.
Collectors already debate what a raw card might become. Before the Slab turns that moment into a live practice market: review the evidence, choose a PSA outcome, track the YES signal, and discuss the card with other collectors.
Simulated $JKB only. No cash value. Not withdrawable. Final PSA result resolves the event.
PSA outcome
PSA 10
Evidence-first event pages
YES / NO practice markets for PSA outcomes
Public discussion and activity
Signal history before the final grade
How collectors use JK Index
Research & search
Sold listings, market price, and graded sales history for supported cards.
Open card search →Practice before the grade
Review owner-approved evidence, follow the YES signal, and take simulated $JKB positions before the final PSA result is revealed.
Open Before the Slab →Collector workflow
AI Grading Readiness & Risk
Visual analysis of grading risk from front and back card images.
Upload clear images of a card's front and back to get a structured readiness review across surface, corners, edges, centering, and image quality.
Image-based only · No grades · No predictions
Readiness review
A bounded inspection helper for collectors deciding what needs a closer look before any real-world submission decision.
Index spotlight
Curated picks from the Kingdom collection you can open in the index, plus a live sample of public Instant Listings when inventory is available—prices and conditions come straight from active offers, not projections.
Featured cards
Recently listed on Instant Listings
Trading Card Games
Each route is a full workspace for that TCG—sets, card detail, sold history, and marketplace eligibility where the beta supports it. Status badges reflect real coverage, not marketing fluff.
Pokémon
LiveLive Pokémon TCG pricing, sales history, and population data across vintage and modern sets. Built for serious collectors tracking real market activity.
- Vintage & modern sets in the index
- Sold listings and graded sales history
- Instant Listings when inventory is available
Riftbound
LiveRiftbound TCG card prices, sold listings, and market data. Track sets and individual cards with real market activity.
- Early-access coverage with honest status
- Card and set pages tied to market data
- Growing alongside Riftbound releases
One Piece
LiveOne Piece TCG card prices, sold listings, and market data. Track sets and individual cards with real market activity.
- English-language set coverage in the index
- Price history aligned to supported inventory
- Same search and portfolio tools as other TCGs
What is JK Index?
JK Index is a market intelligence and collector platform for trading card games.
Search sold listings, market prices, graded sales history, and supported marketplace listings across Pokémon, One Piece, and Riftbound. Track your collection, follow raw-to-graded context, and explore Before the Slab practice markets before the final PSA result is revealed.
The Kingdom's Quest
The Kingdom began with a mission: collect every 1st Edition Jigglypuff and make it the most iconic non-holo in Jungle. What started as one collector's passion became a community — and the foundation for JK Index.