Hi team, I’ve set up a tool (CL_fetch_contact_memory) that triggers a Make.com webhook. The webhook works and returns a valid JSON with status 200. But Vapi keeps saying “No result returned.” Webhook is responding correctly — so why is the agent not receiving or parsing it? Example response: { "memory_found": true, "summary": "User previously asked about automation bundle pricing on 21 Sept. Requested follow-up.", "last_contact_date": "2025-09-21", "interaction_type": "Web Call", "lead_status": "Qualified", "needs_follow_up": "Yes" } Please help. Thanks, Bishal

Hi there, Thank you for your message. Our team is currently out of the office. We operate Monday through Friday, from 9:00 AM to 8:00 PM Pacific Standard Time (PST). We’ll get back to you as soon as possible during our normal business hours. If your message is urgent, please mark it accordingly or include “URGENT” in the subject line, and we’ll do our best to respond promptly. Warm regards, Vapi Customer Support Team

Your webhook must return a response in this exact format for Vapi to parse it correctly:

json
{
  "results": [
    {
      "toolCallId": "YOUR_TOOL_CALL_ID",
      "result": "memory_found: true, summary: User previously asked about automation bundle pricing on 21 Sept. Requested follow-up., last_contact_date: 2025-09-21, interaction_type: Web Call, lead_status: Qualified, needs_follow_up: Yes"
    }
  ]
}

Replace

"YOUR_TOOL_CALL_ID"

with the actual ID from the incoming request, and ensure the

result

is a single-line string (no line breaks). This should resolve the "No result returned" issue. Reference: [Vapi custom tools troubleshooting](https://docs.vapi.ai/tools/custom-tools-troubleshooting) Source: - [Vapi custom tools troubleshooting](https://docs.vapi.ai/tools/custom-tools-troubleshooting)

Hi Bishal. To get the `result `string for your response packet, use the

Transform to JSON

module in the `JSON `app, as shown in the attached screenshot. https://cdn.discordapp.com/attachments/1419465959508545677/1420005160083652679/image.png?ex=68d3d25c&is=68d280dc&hm=ecf805b007a58ecfe68770c0bc695f8c7610dbe8c8875cb1ba6e8ee6c58aaab4&