# GPTZero

**Canonical:** https://apis.io/providers/gptzero/  
**Website:** https://gptzero.me  
**APIs profiled:** 1

GPTZero is an AI content detection company whose v2 API analyzes text and uploaded documents to determine whether content was written by a human, by AI, or is a mix of both. The API returns document-, paragraph-, and sentence-level probabilities along with supporting perplexity and burstiness signals, plus asynchronous batch analysis and aggregate reporting. Authentication is via an X-API-Key header, requests are rate limited to 30,000 per hour, and API access is bundled with the Professional plan. GPTZero was surfaced as a portfolio company of Uncork Capital and has been enriched into the API Evangelist network from its public developer surface.

## Kin Score — 54.5 / 100 (strong)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (-0.6 from 55.1).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 50.3 |
| Governance | 4.5 |
| Contract Governance | 4.5 |
| Operational Transparency | 39.5 |
| Developer Ergonomics | 66.1 |
| Commercial Clarity | 63.2 |
| Access Clarity | 63.2 |

Regulatory layer — **Education & Research**: 46.3 (matched via tags).

## Agent readiness — 20.7 (agent-aware)

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

## Access

Freemium · Self-serve signup — onboarding: self-serve, pricing: freemium, trial: no (confidence: high).

## APIs (3)

- **GPTZero Batch API** — Batch processing
- **GPTZero Detection API** — AI content detection
- **GPTZero Documents API** — Document analysis

## MCP servers (1)

- **GPTZero MCP Server**

## Agentic access (1)

- **Gptzero Agentic Access** — 7 operations · 3 acting

## Security (2)

- **Gptzero Authentication** — apiKey · 1 scheme
- **Gptzero Domain Security** — TLSv1.3 · HSTS · DMARC

## Plans (1)

- **Gptzero Plans**

## Tags

Company, Artificial Intelligence, AI Detection, Content Moderation, Machine-Learning, Text Analysis, Natural Language Processing, Education

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