OP Compare — opcompare.app

One Piece Card Game prices, compared across stores in six markets — the United States, Australia, the United Kingdom, Singapore, Canada and the eurozone. Every card, every Parallel / Manga / SP / Treasure Rare / promo printing and every sealed product, priced twice a day.

OP Compare is the One Piece sister site of RiftCompare: the same layout, navigation, market switcher, price-comparison board and data rules, rebuilt for One Piece with its own theme (night-sea navy, Straw Hat red, straw gold), its own straw-hat logo, its own database and its own store list.

Independent fan-made site. Not affiliated with Bandai, Eiichiro Oda, Shueisha or Toei Animation.

What's on the site

Page	What
/	Hero search, trending cards, market switch, today's top deals, newest set's chase cards, booster boxes, colours, FAQ. Share image: the price guide (see below)
/browse	The card database: search, filters (price, set, colour, rarity, type, printing), sorts, pagination
/card/[slug]	One printing: every store's price (and the cheapest matching eBay listing) in your market cheapest first, eBay search, TCGplayer reference, price history, card text and details, other printings, "Report a wrong price". Share image: art, printing and rarity, price per market
/sets, /sets/[slug]	Every set by type, each with its card list, stats and sealed products. Share image: the set's five most valuable cards
/sealed, /sealed/[slug]	Booster boxes, cases, packs, starter decks, double packs, collections — filters, per-pack prices, price board. Share image: the product and its price
/price-guide	Every printing in one sortable table, prices by set. Share image: the price guide
/movers	This week's risers, fallers and best value vs 90-day high
/market	The OP Compare Index (chained, value-weighted) and value by set
/leaders, /colors, /cards, /cards/all	Leaders by colour, colour hubs, type/rarity/printing hub, A–Z index
/tools, /tools/deal-finder	The tools hub; listings under market price (signed out: a preview; free account: top 3; Plus/Premium: every deal)
/tools/best-basket	Price a deck or your watchlist delivered, split across stores with measured postage. Free account: the delivered total (5 a day); Premium: the store-by-store plan, condition floor, best 1- and 2-store orders. /tools/buy-list redirects here
/tools/box-ev, /tools/rising, /tools/demand, /trade, /tools/selling-fees	Box EV calculator (community pull-rate estimates; /tools/box-value redirects), Rising Cards, Demand Finder, trade calculator, fee calculator
/deck, /decks	The deck pricer (the bulk pricer; /bulk-pricer redirects) and the public deck library
/premium, /login, /account	Plus ($2.99/mo · $23.99/yr) and Premium ($4.99/mo · $39.99/yr) via Stripe; Google / Discord sign-in; manage or cancel in Stripe's portal
/stores, /stores/suggest	Every store we read, per market, with today's matched listings; suggest a store
/blog, /blog/[slug]	Data-driven posts (most expensive cards, booster box prices, rarities explained, where to buy, where to buy EB05, cheaper abroad, budget Leaders, set reviews) — Article schema, RSS at /feed.xml. Share image: the title beside three hero cards
/release-dates, /authors, /editorial-policy
/watchlist	Hearted cards and products (saved in the browser)
/portfolio, /portfolio/sets, /portfolio/sets/[set]	My binder (free to 50 cards, unlimited with Plus/Premium): what the cards you own are worth in your market with a daily value chart, the replacement cost, CSV import/export (TCGplayer Product ID or card number + printing), and the set checklist with the cost to finish a set. /c/[token] is the read-only share link (noindex; cost and notes never shown)
/alerts	How watchlists and price alerts work (static; honest about whether email is on)
/alerts/action, /alerts/manage, /alerts/release, /unsubscribe, /newsletter/unsubscribe	The pages the links in alert, release and newsletter emails open: a confirm card first, only the button's POST acts, all noindex
/about, /methodology, /contact, /feedback, /privacy, /terms	/contact and /feedback are forms that land in the admin inbox (no email is sent)
/admin	Admins only (404 for everyone else): see Admin

Share images (link thumbnails)

Links to OP Compare unfurl as the price guide, drawn from real data (src/lib/og/, 1200×630 PNGs with the site's own fonts). / and every page without its own image show "ONE PIECE PRICE GUIDE" with five real top cards: art, printing, the cheapest US price, TCGplayer market, number, and store count (7-day change once a week of moves exists). /price-guide, sets, sealed products, cards and blog posts get their own. A data error never breaks a share: it draws a data-free fallback card. Each image is drawn on its first request and then served from the cache for a day (the fallback for a minute).

Admin

Sign in with an admin account and the account menu shows Admin. An admin is [email protected] (built in), or the addresses in ADMIN_EMAILS if that is set (it replaces the built-in one), or a user with User.isAdmin. Admins count as Premium. Everyone else gets a 404 at /admin.

Page	What
/admin	Counts: accounts, current members, new inbox items, stores whose newest read failed
/admin/accounts	Search and filter accounts, daily sign-ups, CSV export; grant or revoke Plus/Premium by email (audited; a live Stripe subscription re-grants itself) and run the Stripe reconcile now
/admin/subscriptions	OP Compare's Stripe subscriptions (site=opcompare only): MRR, tiers, trials and churn, and how many accounts are entitled in the database
/admin/store-health	Per-store alerts from ImportRun results: failing, stale, empty reads, dropped listings or match rate, implausible prices, currency skips (also printed as a step in each Import prices run)
/admin/inbox	Price reports, store suggestions, feedback and contact messages, with status changes. No IP addresses stored, no email sent

Scripts: npm run health:stores (the store-health report) and npm run audit:inbox (inbox counts, emails masked). An optional ADMIN_TOKEN lets scripts call /api/admin/* with an Authorization: Bearer header.

Where the prices come from — and the eBay rule

Source	What	Markets
TCGplayer via TCGCSV (category 68)	The whole catalogue (87 groups, ~7,300 printings, ~420 sealed), card text and stats; the cheapest listing (a US offer) and the market price (a reference everywhere, "≈" outside the US)	US + reference
Stores (src/lib/stores.ts)	Shopify stores' One Piece collections, read with Shopify Markets pricing for their own country; ShadowPOS, Ecwid and BigCommerce stores through their own readers (src/lib/store-import.ts); every listing matched to one exact printing (src/lib/match.ts)	US AU UK SG CA EU
eBay	Listing prices from OP Compare's own eBay application (Browse API, its own 5,000 calls a day), searched twice a day by scripts/ebay.ts (ebay-prices.yml): singles of US$100+ daily, US$20+ (US$50+ in the EU) and sealed of US$30+ every two days; the cheapest matching Buy It Now listing, ranked among the stores by item price, never re-ranked. Off until the GitHub secrets exist. Plus EPN-tagged search links on your own eBay everywhere. API hosts and credentials live only in src/lib/ebay*.ts (tests/no-ebay-api.test.ts).	US UK AU EU (Spain); CA sealed + US-derived singles; SG links only

Matching follows RiftCompare's rule: understated, never wrong. A listing is matched only when exactly one printing fits its card number (or TCGplayer's exact name + set), its card name and its printing words; graded slabs, playsets, lots, live breaks, event entries and non-English listings are never matched, and a match far from the printing's market price is dropped as a probable mismatch.

Price history is in GitHub

Postgres holds only today's prices. Every import writes the history as JSON (src/lib/history.ts): one file per day, each product's last two years in 256 bucket files, and the index. The workflow commits them to the data branch, and pages read them from GitHub pinned to that commit. It's open data: data/history.

Stack

Next.js 14 (App Router) · TypeScript · Tailwind (RiftCompare's themeable token system, recoloured) · Prisma + Postgres (Neon) · Vercel · GitHub Actions.

Going live

• docs/CHROME-SETUP-PROMPT.md — one prompt for Claude in Chrome that does the whole setup: Neon database, GitHub branch/permissions/secrets/variables, Vercel project, domain and env vars, Google and Discord sign-in, Stripe, first import and deploy, GA4, Search Console, Bing and the search workflows.
• docs/SETUP.md — the same steps written out, with every Vercel and GitHub variable, which ones reuse RiftCompare's values, and the free-tier limits.

Deploys are gated (ported from RiftCompare)

vercel.json's ignoreCommand (scripts/vercel-ignore-build.sh) skips any production build whose commit subject lacks [deploy]; .github/workflows/production-deploy.yml lands one such commit on main every Monday at 08:00 UTC, after the morning import (weekly since 2026-10-08: the site runs passively on the free Neon allowance). Previews always build. RiftCompare adopted this after per-push builds exhausted its Neon transfer allowance; OP Compare starts with it.

Egress rules

Pages never query the database directly: they read the self-cached loaders in src/lib/data.ts (unstable_cache, tag prices, 6 h TTL, purged by the import). The catalogue is two compact cache entries (~0.6 MB each, under the 2 MB item limit). See the header of src/lib/db.ts; tests/nested-cache.test.ts pins it.

Local development

npm install
cp .env.example .env                 # point DATABASE_URL at a local Postgres
npx prisma db push
npm run import:catalog               # catalogue + TCGplayer, ~30 s
IMPORT_ONLY_STORES=cherry,danireon npm run import   # a few stores
npm run dev

Command
npm run import	Full import (catalogue, every store, aggregates, history, index)
IMPORT_ONLY_COUNTRY=UK npm run import	One market's stores
npm run typecheck / npm run lint / npm test	Checks (CI runs all three)
npm run icons	Regenerate the favicon set from the logo geometry

Adding a store

Add an entry to src/lib/stores.ts (key, name, base, country, the One Piece collection handles, and currency only if it charges something other than its market's currency). The importer also re-discovers One Piece collections from the store's sitemap each run. Its singles must carry card numbers (or TCGplayer-style names) in their titles. A store that sells only sealed product sets sealedOnly: true (BeachesTCG): its listings then go through the sealed matcher alone, so nothing it lists is ever priced as a single. A store with no measured postage needs an "unmeasured" line in src/lib/shipping-rates.json (tests/shipping.test.ts); it is priced on the market's estimate until the postage probe measures it. A store on another platform sets platform (shadowpos, ecwid, bigcommerce, nopcommerce, woocommerce; see each reader's header for what collections means there). Check a candidate first with npx tsx scripts/probe-stores.ts [--platform=…] <base> <market>: it runs the real reader and matcher and prints what the import would keep.

Not ported (yet) from RiftCompare

Trial reminders and inbox replies (and so RiftCompare's $1 trial), the deck builder, games, AdSense, social/ads marketing, the mobile app, support tickets, the admin tools that need data OP Compare doesn't collect (demand, rising snapshots, tier floor, decks, loyalty, consulting, store partners) and admin ?key= links, and Cardmarket as an EU source (its public files carry no card numbers, and One Piece's many same-name printings make name-only matching unsafe — and the data permission RiftCompare holds was granted for Riftbound). Plus and Premium need an account.

Email (built, off until configured)

Price alerts, release alerts, the welcome email and the weekly newsletter are built and send nothing until both RESEND_API_KEY and EMAIL_FROM exist as GitHub Actions secrets (OP Compare's own Resend account, never RiftCompare's, never on Vercel). Every send runs script-side in Actions: scripts/alerts.ts after each import (import-prices.yml), scripts/email-hourly.ts hourly (email.yml) and scripts/newsletter.ts on Fridays 21:00 UTC (email-weekly.yml). Until then the alert run still works: it advances baselines and delivers each trigger in-app (a notification on the dashboard and a chip on the watchlist), and no page promises an email or shows an email field. Each run records Meta email = on/off, which is what the site reads. A key that is set but refused fails the run red. tests/no-email-api.test.ts pins where the provider hosts and key names may appear and that no page or route can call a send function. Setup: docs/SETUP.md section 6b.