Feature Requests

It would be great if Zyphra ZONOS model is added to VAPI. Zonos-v0.1 is featuring two expressive and real-time text-to-speech (TTS) models with high-fidelity voice cloning. https://www.zyphra.com/post/beta-release-of-zonos-v0-1 https://www.zyphra.com/

Ability to modify speed of generated speech - micro changes - i.e. 5% increments to +/- 15%.

Currently idle message is only in english, would be great to be able to place custom messages in the language we want

If someone asks the agent to slow down or repeat something have a way to adjust the voice speed.

I see you show the code for the workflow but I can not make edits to it or upload my own code for a custom workflow. I would like to program out my workflow, add or upload it, and run it like I would in Twilio studio flow.

Im experiencing a technical problem with our outbound calling agent's ability to navigate IVR systems. While using Vapi's built-in DTMF functionality, the system logs indicate successful function calls with the correct digits, but many IVR systems fail to detect these inputs. This issue has been observed across multiple IVR systems, though it functions correctly with some. Affected Call IDs dde63818-b547-41eb-bfd3-9e587cddd2ab df13e533-4b27-4cd7-9c07-54e7f61a807f ea0db2d8-a59f-4ae9-9b50-d49116efc056 1f5dd938-b0e6-40f2-b549-d9a6280a3606

It will be great if existing tools can be re-used as a central/common place for functions that can be shared between workflows. It seems limiting to not allow workflows to call existing tools.

Ability to hide prompts from frontend dev tools, by creating a web call with a server SDK and passing a token to the client SDK to join.

Retell has a cheap option of batch calling which costs 0.005 per dial. Please add it otherwise, gets very very expensive.

Its a to complicated, time consuming proces