TypeScript 61.9%
HTML 37.2%
SQL 0.7%
1{2 "id": "ngc-priceguide",3 "displayName": "NGC US Coin Price Guide (retail guide values by grade)",4 "sourceId": "ngc",5 "sourceName": "NGC (Numismatic Guaranty Company)",6 "sourceType": "grading_company",7 "sourceUrl": "https://www.ngccoin.com",8 "module": "api/ngc-priceguide",9 "enginePriority": ["api", "firecrawl"],10 "categories": ["coins"],11 "regions": ["US"],12 "languages": ["en"],13 "currency": ["USD"],14 "supportsListings": false,15 "supportsSold": false,16 "supportsAuctions": false,17 "supportsImages": false,18 "supportsCatalog": true,19 "supportsPopulation": false,20 "supportsLookup": false,21 "refreshFrequencyMinutes": 10080,22 "priority": "low",23 "trustScore": 0.85,24 "attributionRequired": true,25 "termsUrl": "https://www.ngccoin.com/legal/terms-of-use/",26 "accessNotes": "Plain HTTPS with the RareIndex user agent, 0 credits, no login. robots.txt: 'user-agent: * Allow: /' (only AhrefsBot is disallowed). LEGAL NOTE: NGC's Terms of Use contain a clause against automated access/copying; the connector therefore runs at the lowest cadence (weekly, 4 s between requests, ≤ 10 series pages per run), reads only the public retail guide pages and keeps guide values as attributed price observations — review before enabling in production. Pages read: /coin-explorer/data/categories/ (public JSON: 27 categories, 198 subcategories) and /price-guide/united-states/<category-seo>/<SubcategoryID>/ (server-rendered series page: NGC coin id, year/mint, description, denomination, designation MS/PF, per-row 'Updated: m/d/yyyy', one price cell per grade PrAg…70 incl. + and ★ grades). Observation date = the row's own 'Updated' date (never the fetch time). The World price guide (/price-guide/world/) is behind a Cloudflare interactive challenge and is NOT fetched; the price-history JSON, census/population, cert lookup and 'Shop/eBay' links are not fetched.",27 "enabled": true,28 "schemaVersion": "1.0",29 "historicalDepth": "none",30 "acquisitionMethod": "Static HTML series pages + public categories JSON",31 "config": {32 "subcategoriesPerRun": 10,33 "onlySubcategories": []34 }35}36