Classifier Dev

classifier.dev is a zero shot text classification API served over plain HTTP. A caller sends text and a list of labels and gets back a label with a confidence score, with no training data required; the same service also answers structured questions about images and can scrape a public URL and classify its content. Free use needs no account or API key, so a single curl request with labels and text in the URL returns a result immediately. It is built for developers and coding agents that need quick categorisation of feedback, tickets, snippets or articles. A command line tool sorts a file of up to a thousand lines per request and can surface only low confidence rows for review. A skill installs into agents such as Claude Code, Codex and Cursor, and an OpenAPI 3.1 description and llms.txt index are published. The underlying model is called Jev; a Smart tier re asks only the answers Jev was unsure about, and the site publishes its own benchmark results on public test sets. Published plans are Free at $0 with a $5.00 signup credit and one seat; Pro at $20 per month with $20.00 of monthly usage, three seats and ten times the rate limits; Scale at $200 per month with $200.00 of usage, unlimited seats and one hundred times the rate limits; and custom Enterprise with dedicated deployment and private inference. Usage costs $0.042 per million input tokens, plus $2.00 per 1,000 successful Smart escalations, $2.20 per 1,000 URL scrapes, and $0.084 per million tokens for long context. Output tokens are free, and prepaid top ups from $5 to $1,000 never expire.