> ## Documentation Index
> Fetch the complete documentation index at: https://docs.yingtu.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Callbacks

> Receive terminal task notifications over HTTPS.

Set `callback_url` when submitting a task. Your endpoint should acknowledge
valid deliveries quickly and process long-running work asynchronously.

<Warning>
  Verify callback authenticity before trusting its contents. The signature
  contract will be documented before callbacks are enabled for production.
</Warning>