GPTZero

aid: gptzero
name: GPTZero
description: 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.
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://gptzero.me/logo.png
url: https://raw.githubusercontent.com/api-evangelist/gptzero/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- uncork-capital
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Ai
- AI Detection
- Content Moderation
- Machine Learning
- Text Analysis
- Natural Language Processing
- Education
apis:
- aid: gptzero:gptzero-batch-api
  name: GPTZero Batch API
  description: Batch processing
  humanURL: https://gptzero.stoplight.io/
  baseURL: https://api.gptzero.me/v2
  tags:
  - Batch
  properties:
  - type: OpenAPI
    url: openapi/gptzero-batch-api-openapi.yml
  - type: APIReference
    url: https://gptzero.stoplight.io/docs/gptzero-api/5bf295g49gwxp-gpt-zero-api
- aid: gptzero:gptzero-detection-api
  name: GPTZero Detection API
  description: AI content detection
  humanURL: https://gptzero.stoplight.io/
  baseURL: https://api.gptzero.me/v2
  tags:
  - Detection
  properties:
  - type: OpenAPI
    url: openapi/gptzero-detection-api-openapi.yml
  - type: APIReference
    url: https://gptzero.stoplight.io/docs/gptzero-api/5bf295g49gwxp-gpt-zero-api
- aid: gptzero:gptzero-documents-api
  name: GPTZero Documents API
  description: Document analysis
  humanURL: https://gptzero.stoplight.io/
  baseURL: https://api.gptzero.me/v2
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/gptzero-documents-api-openapi.yml
  - type: APIReference
    url: https://gptzero.stoplight.io/docs/gptzero-api/5bf295g49gwxp-gpt-zero-api
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://gptzero.me
- type: DeveloperPortal
  url: https://gptzero.me/developers
- type: Documentation
  url: https://gptzero.stoplight.io/
- type: APIReference
  url: https://gptzero.stoplight.io/docs/gptzero-api/5bf295g49gwxp-gpt-zero-api
- type: GettingStarted
  url: https://support.gptzero.me/hc/en-us/articles/15525014408215-How-can-I-get-the-API-and-request-code-samples
- type: Support
  url: https://support.gptzero.me
- type: Blog
  url: https://gptzero.me/news
- type: GitHubOrganization
  url: https://github.com/GPTZero
- type: Pricing
  url: https://gptzero.me/pricing
- type: SignUp
  url: https://app.gptzero.me/login
- type: TermsOfService
  url: https://gptzero.me/terms-of-use.html
- type: PrivacyPolicy
  url: https://gptzero.me/privacy-policy.html
- type: Integrations
  url: https://gptzero.me/integrations
- type: OpenAPI
  url: openapi/_original/gptzero-openapi-original.json
- type: Authentication
  url: authentication/gptzero-authentication.yml
- type: Packages
  url: packages/gptzero-packages.yml
- type: SDKs
  url: packages/gptzero-packages.yml
- type: MCPServer
  url: mcp/gptzero-mcp.yml
- type: AgentSkill
  url: skills/gptzero-detect-ai-text.md
- type: AgentSkill
  url: skills/gptzero-batch-analysis.md
- type: LLMsTxt
  url: llms/gptzero-llms.txt
- type: Overlay
  url: overlays/gptzero-openapi-overlay.yaml
- type: Conformance
  url: conformance/gptzero-conformance.yml
- type: Conventions
  url: conventions/gptzero-conventions.yml
- type: Lifecycle
  url: lifecycle/gptzero-lifecycle.yml
- type: ChangeLog
  url: changelog/gptzero-changelog.yml
- type: DataModel
  url: data-model/gptzero-data-model.yml
- type: RateLimits
  url: rate-limits/gptzero-rate-limits.yml
- type: Plans
  url: plans/gptzero-plans.yml
- type: DomainSecurity
  url: security/gptzero-domain-security.yml
- type: AgenticAccess
  url: agentic-access/gptzero-agentic-access.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence