classifier.dev
Sort up to 1,000 texts into your own labels with a calibrated confidence per answer. No API key.
34 stars
Reviews
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If you have run it, two minutes of your experience saves the next person an afternoon.
Tools (4)
write = sends, deletes, buys or postsclassify_multi_labelFreeLike classify_texts, but each text gets every label that applies (possibly none), with an independent 0-1 score per label. Use this for tagging — topics of an article, components touched by a ticket — where one answer is not enough. Set max_labels to cap how many come back per text. Labels scoring >= 0.7 are kept.
classify_textsFreeSort up to 1,000 texts into exactly one of your own labels each, with a calibrated confidence per answer. Use this when you have many items to triage, route, filter or bucket and do not want to read them all: search results before opening them, tickets, log lines, changed files, feedback. Do not use it for fewer than about five items you can already see — just decide. Confidence is calibrated (answers >= 0.9 are right ~82-92% of the time; < 0.5 about 30-60%), so act on the sure ones and look at the rest yourself, or pass tier "smart" to have the unsure ones re-asked of a reasoning model.
count_labelsFreeClassify up to 1,000 texts and return only a histogram: how many landed on each label, and how many the model was unsure about. Use this when you want the shape of a corpus — what share of feedback is bugs vs praise, how many search results are relevant — without pulling a thousand individual answers into context. Use classify_texts when you need the answer per item.
review_uncertainFreeClassify up to 1,000 texts and return only the ones whose confidence fell under a threshold (default 0.7), each with its two most likely labels. Use this after a bulk classification to decide which items deserve your own attention: the confident answers can be trusted, these are the ones to read. Returns the index of each item so you can map back to your list.
Public scan report
scanner v0.1.3 · 2026-09-19 · same rubric, same numbers if you re-run it
- –Code scanremote-only server, no package to scann/a
- Live reliabilityremote reachable in 162ms20/20
- Tool poisoning4 tool descriptions checked15/15
- Auth qualityopen endpoint, read-only tools10/15
- Maintenancelast push 0 days ago15/15
- Maintainer identitynamespace and repository owner differ; GitHub account older than a year; website matches verified namespace7/10
Install directly
claude mcp add --transport http classifier https://classifier.dev/mcp
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