We believe categorization shouldn't require building and maintaining your own model. CategorizeAPI was built to give any team a fast, consistent way to classify URLs and text — as a simple API call.
Sorting content by topic is a need that shows up everywhere — ad tech, content moderation, SEO tooling, directories, research. Most teams either hand-roll a classifier or bolt topic detection onto a general-purpose chatbot API.
CategorizeAPI takes a narrower approach: one endpoint, one job. Send a URL or a block of text, get back a category from a fixed 25-item taxonomy, a confidence score, and a short explanation — consistently, every time.
We keep the free tier generous on purpose. You should be able to try the API against real data before committing to anything.
Every decision we make — from API design to pricing — is shaped by these four beliefs.
A fixed taxonomy means the same input reliably maps to the same category — no drifting label sets to handle downstream.
Categorization is a building block, not the whole product. It should respond fast enough to sit inside your own request path.
Text you send is processed to produce a result and not retained for training. URLs are fetched live, not crawled and stored.
Our free tier gives every developer full access to the API from day one — no credit card required.
Committed to keeping one API doing one job well.
Infrastructure & API
Building reliable infrastructure with automatic model fallback, so a single upstream hiccup doesn't take the API down for you.
Categories & Accuracy
Maintaining the 25-category taxonomy and tuning the classification prompt for consistent, well-reasoned results.
UX & Developer Experience
Creating clear documentation and a simple integration path, so getting your first categorization takes minutes, not hours.
Try the demo with no account, or grab a free API key and start integrating today.
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