# \#json-encoding **URL:** https://devforum.zoom.us/tag/json-encoding/50.md [Latest](https://devforum.zoom.us/latest.md) · [Categories](https://devforum.zoom.us/categories.md) · [Tags](https://devforum.zoom.us/tags.md) --- ## [Webhook validation url works, but webinar.end signature always fails](https://devforum.zoom.us/t/webhook-validation-url-works-but-webinar-end-signature-always-fails/83023)
**Author:** [@gustavo1](https://devforum.zoom.us/u/gustavo1)\ **Replies:** 2\ **Last updated:** [February 13, 2023, 9:44pm UTC](https://devforum.zoom.us/t/webhook-validation-url-works-but-webinar-end-signature-always-fails/83023 "2023-02-13T21:44:15Z")
Hi, we are trying to implement the new webhook validation based on signatures and we have a weird issue. The webhook for the “endpoint url validation” is already validated for our app in development and production, but …