Alpha Release: JK Index is in active development. Data coverage is expanding and you may see gaps or inconsistencies as we iterate. Feedback is welcome.
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JK Index TCG Pricing API v0

Canonical identity + price snapshot + confidence for TCG builders and collectors.

Request Beta AccessRead Pricing API v0 DocsStatus

Who it's for

  • TCG inventory systems
  • Collector tools
  • TCG portfolio apps
  • Shop workflows / show lists
  • TCG analytics dashboards

What you get

  • Outcomes: matched | ambiguous | not_found
  • Stable canonical_id
  • as_of + confidence (when available)
  • Missing stays missing — no guessing

Coverage

Supports Pokémon, One Piece, and Riftbound TCGs.

Coverage is DB-derived — see /api/v0/coverage.

Trust rails

  • Fail closed
  • Explicit ambiguity (candidates returned when multiple matches)
  • No fuzzy search in v0
API Basehttps://api.jkindex.io
Status

If you see 404 on /api/v0/*, you're likely calling jkindex.io instead of api.jkindex.io.

Example request

curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://api.jkindex.io/api/v0/price?tcg=pokemon&set=jungle&number=54"

Roadmap

  • v0: lookup contract (private beta)
  • v1: broaden TCG coverage + caching/ETag hardening + docs polish
  • Later: batch endpoints / search (separate version)

API v0 is in private beta. Request access or read the full contract on-site.

Request Beta AccessRead Pricing API v0 DocsStatus