Vapi is the Voice AI platform for developers.

Vapi AI

I've added API tool node to the workflow but I get this error:
https://cdn.discordapp.com/attachments/1377487617481900134/1377487617951531119/rn_image_picker_lib_temp_b977806f-e58d-432d-98d1-ce1908bf837f.jpg?ex=683924d0&is=6837d350&hm=981e76e9919dc2430adba634c1912c84a98baf5f0659e45ff5c2b61708e088f8&

Did you resolved the issue? Facing the same issue

**If you encounter the "each value in nodes.tool.body '$ref' is unsupported" error when saving an API tool node, make sure your JSON schema does not use `$ref` references.**  
Instead, define all properties directly in the schema, like this:

```json
{
  "type": "object",
  "properties": {
    "firstName": { "type": "string" }
  }
}
```
*This ensures compatibility with Vapi and supported LLM providers.*

Source:
- [Vapi API Request Node Documentation](https://docs.vapi.ai/workflows/nodes/api-request)

**If you encounter this error again, make sure your API tool node's body schema does not use `$ref` references.**  
Instead, define properties directly, like this:

```json
"body": {
  "type": "object",
  "properties": {
    "firstName": { "type": "string" }
  }
}
```
*Avoid using `$ref` in your schema, as it's not supported by Vapi's function calling with OpenAI, Anthropic, or Google.*  
For more details, see the [API Request Node documentation](https://docs.vapi.ai/workflows/nodes/api-request).

Source:
- [API Request Node documentation](https://docs.vapi.ai/workflows/nodes/api-request)

Hey Naveen, checking if this is resolved/solved for you?