The Widget & Registry API
Paste once. Registry on your site.
The CardFax widget drops into any HTML block — Shopify, WordPress, Squarespace, Wix, GoDaddy — and renders slab verification badges, full registered records, and your graded inventory, live from the registry. Behind it sits the Registry API, metered by your plan; developers can call it directly.
<div data-cardfax="verify" data-serial="5753577"></div> <script async src="https://cardfax.com/embed/v1.js" data-key="YOUR_KEY"></script>Request an API Key
Three endpoints, one source of truth
Records respect every card's visibility settings, and owner information never leaves the registry. Private records still verify — verification belongs to the slab.
Verification
GET /v1/verify/{serial}
Registered-or-not for any serial on a slab, with the shown grade and the permanent registry link. The endpoint behind the verification badge.
Full record
GET /v1/cards/{serial}
The complete registered record: grade, all four subgrades, card identity and attributes, images, grader attribution, and registration date.
Your inventory
GET /v1/cards
Every card registered to your account as a paginated feed, with sport and minimum-grade filters — your graded inventory, rendered on your site.
Priced per site, never per view
Your key carries a monthly call allowance. Hitting the cap never produces a surprise bill — calls pause and we talk about the next tier.
Starter
$9per month, per site
2,500 calls / month
The verification badge and record tiles on your shop's site, carrying the “Powered by CardFax” badge. Everything a storefront needs to prove its slabs.
- — Verification badge widget
- — Card record tiles
- — Registry API access included
Pro
$29per month, per site
50,000 calls / month
For active shops and breakers surfacing their whole graded inventory. The inventory grid widget, styling control, and room to grow.
- — Everything in Starter
- — Inventory grid widget with filters
- — Widget styling control
- — Usage reporting
Partner
$99per month, sales-led
500,000 calls / month
White-label registry tenancy on CardFax infrastructure — your brand, your labels, the same permanent record underneath.
- — Everything in Pro
- — Tenant registry endpoints
- — Custom integration support
- — Licensing agreement
Enterprise
Contact usfull site build integration
Custom volume
We build your graded-card storefront end to end and integrate the registry however your business needs it — custom API work included.
- — Full site build and launch
- — Deep registry integration
- — Custom endpoints and volume
- — Dedicated support
How it works
Every key is issued to a named licensee and metered per calendar month. Requests authenticate with a bearer key that is stored only as a hash on our side; browser embedding is limited to the origins you register, and every response carries your live usage in its headers. Onboarding comes with your key, your base URL, and worked examples for the verification badge and the inventory feed.
Get Started