if somehow my apis are down or anything due to which i do not receive and acknowledge webhook of call received , does vapi retries to send that webhook again if now how can i get and set retry settings its very needful for me as in my case i am pushing new calls only once i get call end report in webhook

I couldn't find enough info in the docs to answer your question about webhook retries and how to configure retry settings if your API is down. I've escalated this to a human teammate who can help you out! In the meantime, you can check out the [Server URLs & Webhooks docs](https://docs.vapi.ai/server-url/setting-server-urls) for more on how to set up your endpoints, but they don't cover retry logic specifically.

Vapi does not retry failed webhooks, so you must implement your own retry logic or use scheduled polling to ensure you don’t miss critical events like call-end reports..

but in assistants while creating providing server url there is backoff plan that defines the retrial limil and delays i just found now

You can configure the backoff plan for your server url and also implement your own retry logic to further prevent critical event reports