# GET /webhook_event_types (OpenAI API)
Base URL: https://api.openai.com/v1
Auth: Authorization; OpenAI API key; required.
Last verified: 2026-09-18

> List Webhook Event Types

## Critical Gotchas
* The Responses API is the primary interface for new text and tool workflows; Chat Completions remains a separate compatibility API.
* Audio transcription uploads use multipart form data rather than a JSON request body.

## cURL
curl -X GET 'https://api.openai.com/v1/webhook_event_types' \
  -H "Authorization: Bearer $OPENAI_API_KEY"

## Response example
{"object":"list","data":["string"]}

---
Need an API key? Get one at https://platform.openai.com/api-keys