ChatGPT AI Visibility API — Authentication — FetchLayer Docs
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Authentication

All requests use your FetchLayer API key as a Bearer token. No OpenAI account and no OpenAI API key is required — these are the answers an anonymous visitor gets, read for you.

Sending requests

bash
curl -X POST https://api.fetchlayer.dev/chatgpt/mentions \
  -H "Authorization: Bearer ss-your-key" \
  -H "Content-Type: application/json" \
  -d '{"prompt":"best reddit api alternatives","targets":[{"name":"FetchLayer","domains":["fetchlayer.dev"]}]}'

Keep your key secret

Only use API keys in server-side code and rotate a key immediately if it is exposed.

Every route is a POST

All five endpoints take a JSON body over POST, so the key never travels in a URL. Unrecognised body fields are rejected with a 400 naming the field, so a typo such as targests fails loudly instead of being quietly ignored.

Authentication errors

A missing or invalid key returns HTTP 401.

json
{
  "error": "Invalid API key"
}