custom tool HTTP Params Vapi AI #support

custom tool HTTP Params

Daco

05/23/2025, 1:45 AM

Hi, I'm using PipeDream + SendGrid and want to send an email to our sales team after call specifically with the callers details and their enquiry. I've noticed that when the sendEmail tool is triggered, the endpoint is receiving a lot of information (essentially the whole bot config) - is there way to force that it only sends through the defined parameter in the tool?

Daco

05/23/2025, 1:54 AM

Tool:

Copy code

{
  "id": "8339651a-9ba5-4603-a94b-54b72d23f382",
  "createdAt": "2025-05-22T23:15:12.323Z",
  "updatedAt": "2025-05-23T01:32:16.719Z",
  "type": "function",
  "function": {
    "name": "sendEmail",
    "strict": true,
    "description": "This tool is to be triggered after the call; it's an email to our sales team, only the emailBody parameter should be sent, this parameter should contain the captured callers details as well as a brief summary of what they are enquiring about.\nEnsure the content is formatted for JSON, like replacing line breaks with \\n",
    "parameters": {
      "type": "object",
      "properties": {
        "emailBody": {
          "description": "This is the body content of the email",
          "type": "string"
        }
      },
      "required": [
        "emailBody"
      ]
    }
  },
  "orgId": "62c50b68-c08c-4ab3-bbe4-6c52392d0e66",
  "server": {
    "url": "REDACTED",
    "timeoutSeconds": 30,
    "headers": {
      "Authorization": "REDACTED"
    }
  },
  "async": true
}

Kyle

05/23/2025, 12:37 PM

Hey Daco, we don't allow limiting the response that needs to be sent.

Daco

05/26/2025, 10:43 AM

Thanks for replying Sahil

Vapi Support Bot

05/26/2025, 10:44 AM

**Vapi does not currently support restricting the payload to only the defined tool parameters**—your endpoint will receive the full context. As a workaround, you can filter the payload on your server to extract just the

emailBody

before sending it to PipeDream or SendGrid. For example, in Node.js/Express:

Copy code

js
app.post('/your-endpoint', (req, res) => {
  const emailBody = req.body?.message?.toolCallList?.[0]?.function?.arguments?.emailBody;
  // Now use emailBody with SendGrid or PipeDream
});

This ensures only the relevant data is processed further. Source: - [Custom Tools Request Format](https://docs.vapi.ai/tools/custom-tools#request-format-understanding-the-tool-call-request)

Kyle

05/27/2025, 3:32 AM

Please reach out to us if you have any other questions regarding this issue

Previous Next