VAPI•9h ago

The API request body is not filled properly

I have created an API request tool. It have a one mandatory body param. But it is empty on the test UI and while integrated to the agent this field is not filled.
On calling this tool agent also refuse to fill up the field and request returns an error.

VapiAPP•12/20/25, 11:27 PM

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Vapi Support BotAPP•12/20/25, 11:27 PM

Thank you for sharing the details of your issue. Based on the information provided, it appears that your API request tool requires a mandatory body parameter (

id

id

), but this field is not being filled in the test UI or when integrated with the agent, resulting in an error when making the request.

Unfortunately, I do not have additional information on why the test UI or agent is not populating the

id

id

field, or how to resolve this specific issue. If you have access to further configuration options or logs, reviewing those might help identify why the parameter is not being set.

If you have any more details or specific questions, feel free to share them!

⤵️ Mention @Vapi Support Bot for follow-ups 🐥

The API request body is not filled properly

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