# classifier.dev

> Zero-shot text classification over plain HTTP. Free without a key; paid plans raise rate limits 10-100x. Sort up to 1,000 texts into your own labels in one call with a calibrated confidence per answer. This service's live agent interface is MCP (Streamable HTTP) at the URL below; A2A message/send is not implemented.

- **Domain**: `classifier.dev`
- **Provider**: Michael Ryaboy (https://classifier.dev)
- **A2A protocol version**: 0.3.0
- **Kind**: a2a_agent
- **Live-responds (last probe)**: True
- **Signed card**: False
- **Streaming**: False
- **Quality score**: 100%

## Skills
- **Classify texts into one label each** — Sort up to 1,000 texts into exactly one of your own labels each, with confidence per answer. Use this when you have many items to triage, route, filter or bucke
- **Classify several dimensions per text** — Classify each text by several named dimensions, such as team, urgency and kind, in one request. Returns a label, confidence, scores and model for each field. At
- **Tag texts with every label that applies** — Like 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 a
- **Count how many texts fall under each label** — Classify 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
- **Find the texts the classifier was unsure about** — Classify 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 

## URLs
- Agent card: https://classifier.dev/.well-known/agent-card.json
- Page (HTML): https://agenstry.com/agents/classifier.dev
- Documentation: https://classifier.dev/developers