So I am using my CRM system to initiate calls to incoming leads for my clients The thing is, each client has a unique business name, and we want that to change in the prompt, so we create a unique make.com automation per client that is respnsible for sending an API request to Vapi, with a custom prompt / first message and pre-selected existing agent id (Screenshot attached) We want to use the SAME agent, but the prompt and first message has to be dynamic per client (using make.com variables) However, when the call is initiated, Vapi uses the prompt thats in the UI, and not the one in the API request How can I fix this? Thanks https://cdn.discordapp.com/attachments/1356009848050811122/1356009848298279056/image.png?ex=67eb0215&is=67e9b095&hm=b163f937953bc3e72a84b295d8860b60eaa150650438c8db690e33f65a1519f5&

Hi Simon! 👋 I understand you're having an issue where Vapi is using the prompt from the UI instead of the one you're sending in your API request through make.com. This is actually a known issue that other users have reported as well. Based on the information I found, there are a few potential solutions you can try: ### Issue with Your Current Structure Looking at your API request structure, I noticed you're trying to pass

systemPrompt

and

firstMessage

as variables within the

variableValues

object. However, this isn't the correct way to structure the request for overriding prompts. ### How to Fix It 1. **Use the correct structure for `assistantOverrides`**: Instead of putting

systemPrompt

and

firstMessage

inside

variableValues

, try structuring your request like this:

json
   {
     "assistantId": "your-assistant-id",
     "assistantOverrides": {
       "firstMessage": "Your dynamic first message here",
       "messages": [
         {
           "role": "system",
           "content": "Your dynamic system prompt here"
         }
       ],
       "variableValues": {
         "otherVariable1": "value1",
         "otherVariable2": "value2"
       }
     },
     "customer": {
       "name": "Customer Name",
       "number": "Customer Number"
     },
     "phoneNumberId": "your-phone-id"
   }

2. **Note about `systemPrompt`**: According to [documentation I found](https://discord.com/channels/1211482211119796234/1211483291191083018/threads/1337126843790397591), the

systemPrompt

property is deprecated. Instead, use the

messages

array with the role set to "system" to pass your system prompt. 3. **PATCH request behavior**: When updating an assistant using PATCH requests, nested properties are overwritten by default. To ensure all properties are preserved, you must pass both the updated and previous properties as follows:

model: {...modelPrevProperties, ...updated}

. 4. **Check variable templating**:

Hey! To help track down this issue, could you share: - The call ID This would really help us figure out what went wrong!