Chiranjeet Mishra
09/28/2025, 5:16 PMVapi Support Bot
09/28/2025, 5:17 PM"result" value—**no line breaks or hidden characters**—and validate your JSON with a tool like [jsonlint.com](https://jsonlint.com/). For example:
json
{
"results": [
{
"toolCallId": "call_wr1qjeNB8Z3tSQ057D6ELdrf",
"result": "Jeg har ledige tider i morgen. Tilgjengelige tider: 09:00, 10:00, 11:00, 12:00, 13:00, 14:00, 15:00, 16:00"
}
]
}
Even a hidden line break or a non-string value will cause Vapi to ignore the result ([see documentation](https://docs.vapi.ai/tools/custom-tools-troubleshooting#check-http-status)).
Source:
- [Custom tools troubleshooting](https://docs.vapi.ai/tools/custom-tools-troubleshooting)Preben
09/28/2025, 10:06 PMChiranjeet Mishra
10/01/2025, 7:01 AM