GPTZero API Integration

Overview

GPTZero is a specialized AI content detection service. Its API classifies a document as human, ai or mixed, says how confident it is, and returns a probability for every sentence. The FAQ lists ChatGPT, GPT-3 through GPT-6, Gemini, Claude and services built on them as the models it works across.

• API base URL: https://api.gptzero.me (detection paths start with /v2/, usage with /v3/)
• Auth: x-api-key header
• Docs: https://gptzero.me/docs (redirects to the reference at https://gptzero.stoplight.io/)

Instructions

Authentication

Create an account at https://app.gptzero.me, subscribe to an API plan, and copy the key from https://app.gptzero.me/app/api. Set it as GPTZERO_API_KEY in the environment and send it in the x-api-key header on every request. Call the API from a server: a key shipped in browser code can be read by anyone.

Single Text Analysis — POST /v2/predict/text