QuickCat API Documentation

Enterprise-grade website categorization with a robust and precise taxonomy

Base API Endpoint: https://api.quickcatapi.com

Health Check

GET /

Verifies the API server is running.

Status Codes

200 - OK 
Response:
The API server is operating as expected. Please refer to the API documentation for detailed usage instructions and integration guidelines.

Check Credits

POST /check-credits

Retrieve remaining site and request credits for your API key.

Request Parameters

  • key (string, required): Your API key.

Status Codes

200 - Returns credits.
400 - Missing API key.
403 - Invalid or unauthorized API key.
500 - Internal Server Error.

Try It Out

Response will appear here...
Request:
{
  "key": "OLB4OBZJWZK6BD6544PSFGYLN2K2USE5CYEJ2ISSOXDGX9BUY9IX3DEY9W20"
}

Response (200):
{
  "sites_credit": 921,
  "requests_credit": 924
}

Response (400):
{ "message": "Invalid request: API key is required" }

Response (403):
{ "message": "Access Denied: The provided API key is invalid or unauthorized." }

Categorize Sites

POST /categorize

Categorize a list of domains against the predefined taxonomy. Deducts site and request credits from your account.

Request Parameters

  • sites (array of strings, required): List of domains (with or without https://).
  • key (string, required): Your API key.

Status Codes

200 - Success, returns categorized results.
400 - Missing parameters or too many sites.
403 - Invalid API key, insufficient site credits, or insufficient request credits.
500 - Internal Server Error (e.g. DB or external service failure).

Try It Out

Response will appear here...
Request:
{
  "sites": ["https://www.google.com"],
  "key": "OLB4OBZJWZK6BD6544PSFGYLN2K2USE5CYEJ2ISSOXDGX9BUY9IX3DEY9W20"
}

Response (200):
[
  {
    "_id": "67d7bf42aac82580ad096229",
    "originalDomain": "google.com",
    "confidenceScore": 0.99,
    "categories": ["Search Engines & Web Portals >> General Search Engines"]
  }
]

Response (400 - too many sites):
{ "message": "Request limit exceeded: The maximum permitted number of sites per request is 5" }

Response (403 - no site credits):
{ "message": "Access Denied: Insufficient API credits available to make this request" }

Response (403 - no request credits):
{ "message": "Access Denied: Insufficient request credits available to make this request" }

Category Taxonomy

All returned categories are exact matches from the list below, organized for clarity:

Academic & Education
K–12 Schools/Education
K–12 Schools
Preschools & Early Childhood Education
Universities & Colleges / Higher Education
Universities & Colleges
Community Colleges & Vocational Schools
Online Learning & MOOCs/EdTech
Online Learning & MOOCs
Educational Resources & Academic Research
Educational Resources & Research
Libraries & Archives
Standardized Testing & Exam Preparation
Educational Tools & Learning Apps
Tutoring & Academic Support
Scholarships & Grants
Language Learning
Arts
Visual Arts & Galleries
Performing Arts (Theater, Dance, Music)
Literature, Books & Magazines
History & Humanities
Photography & Digital Art / Design
Culture
Cultural Organizations & Heritage / Museums & Heritage
Cultural Organizations & Heritage
Comics, Animation & Cartoons / Anime & Comics
Comics, Animation & Cartoons
Entertainment
Film, Television & Streaming
Music & Audio Platforms
Video Games
Celebrity & Pop Culture
Humor & Memes
Gambling
Adult & Erotica
Adult Entertainment (Pornography)
Erotic Media & Literature
Sexual Health & Education
Escort & Explicit Dating Services
Adult Toys & Products
Fetish & Niche Communities
Alcohol, Tobacco & Drugs
Alcoholic Beverages & Bars
Breweries, Wineries & Distilleries
Tobacco & Vaping Products
Cannabis & Hemp (Medical & Recreational)
CBD Products & Wellness
Pharmaceuticals & Over-the-Counter Medications
Recreational & Controlled Substances
Animals & Pets
Pet Adoption & Rescue
Veterinary Services
Pet Food & Supplies
Animal Training & Behavior
Wildlife & Conservation
Equestrian & Livestock
Automotive & Transportation
Vehicle Manufacturers & Dealers
Auto Parts, Repair & Services
Automotive Marketplaces & Reviews
Motorsports & Racing Events
Public Transportation & Ride-Sharing
Electric Vehicles & Charging Stations
Car Rentals & Leasing
Motorcycles & Recreational Vehicles
Business, Finance & Economy
Corporate & Business Sites
B2B Services & Consulting / Management & Consulting
B2B Services & Consulting
Finance, Banking, Credit & Investing
Finance, Banking & Credit
FinTech (Financial Technology)
Investment & Brokerage Services
Insurance & Risk Management
Accounting, Tax & Legal Services / Accounting & Tax
Accounting, Tax & Legal Services
Business News & Analysis
E-Commerce & Retail Marketplaces / E-Commerce & Retail
E-Commerce & Retail Marketplaces
Advertising, Marketing & PR / Marketing & Advertising
Advertising, Marketing & PR
Startups & Entrepreneurship
Business Directories & Listings
Human Resources
Real Estate
Manufacturing & Industrial
Energy & Utilities
Agriculture & Farming
Transportation & Logistics
Construction & Engineering
Mining & Resources
Economics & Trade
Charity, Nonprofit & Community
Philanthropy, Foundations & Charity
Philanthropy & Foundations
Volunteer, Community Service & Social Advocacy
Volunteer & Social Advocacy
Community Organizations & Events
Humanitarian Aid & Disaster Relief
Environmental, Animal Welfare & Activism
Environmental & Animal Welfare Organizations
Human Rights & Social Justice
NGOs & Non-Profits
Computers, Technology & Software
Hardware & Gadgets
Consumer Electronics & Accessories
Operating Systems & Utilities
IT Services & Cloud Computing
Programming & Developer Tools
Artificial Intelligence & Data Science
Tech News, Reviews & Blogs
Cybersecurity & Threat Management
Software & Applications
Artificial Intelligence, Machine Learning & Data Science
Blockchain, Web3 & Cryptocurrency Technologies
Cybersecurity & Threat Management
Software Development, Applications & Programming Tools
Hardware, Gadgets & Consumer Electronics
Networking, Telecommunications & IT Services
Cloud Computing, Big Data & Backup Services
Internet of Things (IoT)
Robotics & Automation
Augmented & Virtual Reality (AR/VR)
Quantum Computing
Tech News, Reviews & Blogs
Operating Systems & Utilities
Video Conferencing
Content Delivery, Hosting & File Sharing
Content Delivery Networks (CDNs)
Cloud Storage & Backup Services
File Sharing & Peer-to-Peer Networks
Media Streaming Platforms
Web Hosting & Domain Providers
Torrent
Cryptocurrency & Blockchain
Crypto Exchanges & Trading Platforms
Digital Wallets & Payment Systems
Blockchain Technology & Development
NFT Marketplaces
Decentralized Finance (DeFi)
Crypto News & Education
Dating & Relationships
General Dating & Matchmaking
Niche Dating & Relationship Communities
Marriage & Long-Term Relationship Services
Casual Dating & Hookup Platforms
User-Generated & Dynamic Content
Blogs & Personal Websites
Forums & Discussion Boards
Wikis & Collaborative Platforms
Social Media Platforms
User-Generated Video & Audio Content
Code Sharing & Pastebin Services
E-Commerce & Shopping
Online Retail & Marketplaces
Fashion & Apparel Stores
Coupons, Deals & Auctions
Luxury Goods & Designer Brands
Home Goods & Furniture
Specialty & Niche Stores
Entertainment & Media
General News & Journalism
Local & Regional News
Specialty Publications (e.g., Sports, Finance, Tech)
Magazines & Newspapers
Celebrity & Gossip Sites
Podcasts & Audio Shows
Editorial & Opinion
News, Media & Broadcasting
General News & Journalism / Journalism & News
Local & Regional News
Specialty Publications
Magazines, Newspapers & Magazines
Celebrity & Gossip Sites
Podcasts, Radio & Audio Shows
Editorial & Opinion
Broadcasting & TV
Digital Media & Blogs
Environment & Sustainability
Conservation, Wildlife Protection & Ecology
Conservation & Wildlife Protection
Renewable Energy, Green Tech & Alternative Energy
Renewable Energy & Green Tech
Sustainable Living & Eco-Friendly Products
Environmental Science, News & Advocacy
Environmental News & Advocacy
Government, Politics & Public Services
Government Portals, Agencies & Public Administration
Government Portals & Public Administration
Political Parties, Campaigns, Elections & Policy
Political Parties, Campaigns & Policy Sites
Civic, Legal & Public Safety Resources
Civic & Legal Resources
Emergency Services
Public Safety & Emergency Services
Public Policy & International Relations
Military & Defense
Organization for Standardization
Health, Medical & Wellness
Healthcare Providers & Services (Hospitals, Clinics)
Healthcare Providers (Hospitals, Clinics)
Medical Information, Resources & Technology
Medical Information & Health Resources
Fitness, Nutrition & Wellness Platforms
Mental Health & Counseling
Pharmaceuticals, Biotechnology & Medical Devices
Pharmaceutical & Biotech Companies
Alternative & Holistic Medicine
Health Insurance & Benefits
Public Health & Policy
Medical Devices & Equipment
Hobbies, Leisure & Lifestyle
Travel, Tourism & Adventure
Outdoor Recreation & Adventure
Outdoor Recreation & Sports
Arts & Crafts, DIY & Home Improvement
Food, Cooking, Culinary Arts & Dining
Food, Cooking & Culinary Arts
Gardening, Interior Design & Home Decor
Gardening & Interior Design
Photography & Videography
Collectibles & Antiques
Fashion & Beauty
Fitness & Wellness
Home, Family & Personal
Home & Garden (Furniture, Decor)
Family, Parenting & Relationships
Personal Blogs & Lifestyle Guides
Home Improvement & Renovation
Household Appliances & Tools
Humor & Satire
Comedy & Joke Sites
Satirical & Parody Content
Meme & Viral Content
Funny Videos & Podcasts
Illegal, Risky & Questionable Content
Piracy & Copyright Infringement
Hacking, Cracking & Cybercrime
Illicit Trade & Dark Web Content
Extremist, Hate & Radical Content
Counterfeit Goods & Fraud
Internet, Communication & Telephony
Internet Telephony & VoIP
Internet Service Provider
Telecom
Messaging & Chat Applications
Email & Webmail Services
Online Collaboration & Productivity Tools
Jobs, Careers & Professional Networking
Job Boards & Recruitment Sites
Career Advice & Coaching
Professional Networking Platforms
Freelancing & Gig Economy Sites
Lifestyle, Fashion & Beauty
Fashion & Style Blogs
Beauty & Cosmetics Sites
Personal Care & Grooming
Health & Wellness Influencers
Security Threats & Malware
Malware Distribution & Malicious Sites
Phishing & Fraudulent Sites
Spyware, Adware & Risky Software
Ransomware & Cyber Attacks
Military & Defense
Military Institutions & Armed Forces
Defense Contractors & Equipment
Military News & Analysis
Veteran Resources & Support
Online Payment & Financial Services
Payment Gateways & Processors
Digital Wallets & Payment Apps
Currency Conversion & Financial Tools
Peer-to-Peer Payment Platforms
Parked, Under Construction & Unclassified
Parked Domains
Under Construction Websites
Uncategorized / Miscellaneous
Political & Ideological
Political Commentary & Opinion
Activism & Social Movements
Ideological & Extremist Content
Think Tanks & Policy Organizations
Real Estate & Housing
Property Listings & Brokerage
Home Valuation & Mortgage Tools
Rental & Property Management
Commercial Real Estate & Investment
Reference, Libraries & Educational Resources
Dictionaries, Encyclopedias & Reference Sites
Libraries & Archives
Academic Journals & Research Papers
Open Access Publications
Religion & Spirituality
Religious Institutions, Places of Worship & Faith-Based Organizations
Religious Institutions & Places of Worship
Faith-Based Organizations
Spiritual, Esoteric & New Age Topics
Religious Texts, Studies & Doctrines
Religious Texts & Studies
Christianity
Islam
Judaism
Buddhism
Hinduism
Other Religions & Beliefs
Search Engines & Web Portals
General Search Engines
Specialized Search Platforms
Web Directories & Aggregators
Meta Search Engines
Social Media & Community Platforms
Social Media
Photo & Video Sharing Sites
Online Community & Forum Platforms
Influencer & Creator Platforms
Sports & Recreation
Sports Teams & Leagues
Sports News, Commentary & Fantasy Betting
Outdoor, Recreational & Extreme Sports
Individual, Motor & Combat Sports
Athletic Apparel & Equipment
eSports & Gaming
Sports News & Commentary
Fantasy Sports & Betting
Outdoor & Recreational Sports
Streaming, Video & Online TV
Live Streaming Services
Video On-Demand Platforms
Television Network Websites
Streaming Aggregators
Travel & Transportation
Public Transit & Transportation Services
Airlines, Airports & Booking Sites
Ride Sharing, Car Rentals & Taxis
Travel Agencies & Tour Operators
Travel Reviews & Blogs
URL Shorteners & Redirectors
Link Shortening Services
URL Redirection Tools
Virtual Worlds, Gaming & Esports
Virtual Reality & Metaverse Platforms
Online Gaming Communities & MMORPGs
Esports & Game Streaming Platforms
Gaming News & Reviews
Game Mods & Add-ons
Weapons & Tactical Equipment
Weapons Sales & Information
Firearms, Knives & Tactical Gear
Reviews & Enthusiast Communities
Hunting & Shooting Sports
Web Infrastructure & Developer Tools
Web Hosting & Domain Registrars
Website Builders & CMS Platforms
Analytics, SEO & Monitoring Tools
APIs & Developer Platforms
Proxy, VPN & Anonymity Services
VPN Providers & Proxy Servers
Anonymizer & Anti-Tracking Tools
Secure Browsing & Privacy Tools
Tor & Encrypted Networks
Science
Space & Astronomy
Biology & Life Sciences
Chemistry
Physics
Earth & Environmental Science
Mathematics
Social Sciences
Nanotechnology