# Tigris Webhooks and Flycast

Are Tigris webhooks able to hit Flycast URLs, or will it result in a DNS resolution failure?

I’m currently spec‑ing out an image processing pipeline, where images get uploaded to Tigris via presigned URLs, get processed by a Fly app only available via Flycast, and then get moved to a final destination bucket. I don’t think I can fully avoid polling, but I’d like to minimize it if I can.

### Solution

Hi,

Unfortunately, object notifications (webhooks) would not work with a flycast URL. We do support authentication with the webhook so that you can safely expose the app.

The alternative is to use our [Metadata querying](/content/docs/objects/query-metadata/index.html) and use the `Last-Modified` index to get the latest updates.

Cheers

[Tigris Object Storage Documentation](/content/docs/objects/query-metadata/index.html)

Tigris indexes the Last-Modified field for every object stored in a bucket.

### Solution

Hi,

Cheers

[Tigris Object Storage Documentation](/content/docs/objects/query-metadata/index.html)

Tigris indexes the Last-Modified field for every object stored in a bucket.