ive created workflow on non for an ai calling agent, but when im running it with agent that i created with Vapi ai. my n8n worflow is not causing any problem, cause its running fine, but vapi is getting me the issue, ive done everything to resolve it, but everytime it just show no result retuned #1211483291191083018 @Vapi @Nir Simionovich (CEO@Cloudonix) @Pigeon @! Ali Plutus @! Puran Tak https://cdn.discordapp.com/attachments/1432989003287625798/1432989004420222986/Screenshot_2025-10-28_224033.png?ex=69030e82&is=6901bd02&hm=36d10a0f3f53377851601f288583b34a438378b957f5ac11ee6143e28e6bb5ac&

To fix the "No result returned" error, make sure your n8n workflow returns the following JSON structure in its HTTP Response:

json
{
  "results": [
    {
      "toolCallId": "YOUR_TOOL_CALL_ID",
      "result": "YOUR_RESULT"
    }
  ]
}

Replace

YOUR_TOOL_CALL_ID

and

YOUR_RESULT

with the actual values from the incoming request and your workflow output. This format is required by Vapi for tool integrations to work correctly ([see documentation](https://docs.vapi.ai/tools/custom-tools)). Source: - [Custom Tools](https://docs.vapi.ai/tools/custom-tools)

Quick question do you have a web hook response set in n8n after the webhook you connected?