# classifier-dev

**Canonical:** https://apis.io/providers/classifier-dev/  
**Website:** https://classifier.dev/  
**APIs profiled:** 1

classifier.dev provides a zero‑shot text classification API over plain HTTP. Users can submit raw text, URLs, or structured questions and receive classification labels without any API key, account, or authentication. The service offers a free tier with per‑IP limits and paid plans for higher usage, workspace keys, and billing. An OpenAPI 3.1 description is available at /openapi.json and a short index at /llms.txt. Documentation and developer resources are at /developers, pricing at /pricing, terms at /terms, and privacy at /privacy. The platform supports data‑sharing opt‑out via request parameters or headers. Hosted at classifier.dev with source linked to a GitHub organization.

## Kin Score — 64.6 / 100 (strong)

Scored 2026-10-31 under rubric 0.25.0.

| Facet | Score |
|---|---|
| Discoverability | 65.0 |
| Contract Quality | 66.4 |
| Contract Governance | 22.0 |
| Operational Transparency | 47.4 |
| Developer Ergonomics | 70.7 |
| Access Clarity | 76.3 |

Regulatory layer — **Horizontal (data, software, accessibility, platform)**: 37.3 (matched via fallback).

## Agent readiness — 61.1 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | verified |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | verified |
| Event Surface Described | no |
| Agent Skills | unknown |
| Well Known Catalog | yes |
| Consent Identity | no |
| Agent Card | conformant |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | documented |
| Dynamic Client Registration | no |
| Agentic Commerce | no |
| Pagination Ratio | no |
| Operation Distinctiveness | distinct |

## APIs (6)

- **classifier-dev Account API** — Workspace balance and usage; requires a workspace API key and enabled account access.
- **classifier-dev Classifier.dev API** — The Classifier.dev API from classifier-dev — 2 operation(s) for classifier.dev.
- **classifier-dev Classify API** — Sort texts into labels, with a calibrated confidence.
- **classifier-dev Docs API** — Documentation served over HTTP.
- **classifier-dev Feedback API** — Structured feedback from agents (feedback.now protocol): submit, then poll a receipt.
- **classifier-dev Subscribe API** — The Subscribe API from classifier-dev — 2 operation(s) for subscribe.

## MCP servers (1)

- **classifier-dev MCP Server** — Remote MCP server at classifier.dev.

## Agentic access (1)

- **Classifier Dev Agentic Access** — 30 operations · 15 acting

## Security (3)

- **Classifier Dev Authentication** — 2 schemes
- **Classifier Dev Domain Security** — TLSv1.3 · HSTS · DMARC
- **Classifier Dev Vulnerability Disclosure** — security.txt · contact published

## Plans (1)

- **Classifier Dev Plans Pricing**

## Tags

Company, Machine Learning, NLP, Classification, API, OpenAPI

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/classifier-dev/). Scores are computed from the provider's own public artifacts under a published rubric.