Tool unable update
# support
k
Hi! I’ve been trying to update my API-request tool and it seems it’s unable to publish. It appears an error called tool update failed.
v
Thank you for reaching out! To help diagnose the "tool update failed" error, could you please share the exact error message or any additional details shown during the update attempt (such as error codes or log output)? Source: - [Custom tools troubleshooting](https://docs.vapi.ai/tools/custom-tools-troubleshooting)
I've tried creating a new tool but same thing happens
a
@Vapi this is the same issue as [this thread](https://discord.com/channels/1211482211119796234/1438787707085258837) as well
l
This error usually happens when there’s a mistake in the API-request tool settings—most commonly a missing required field, an invalid JSON body, or a wrong URL/header format. To fix it, open your tool settings and carefully check that the method (GET/POST), URL, headers, and JSON body are all valid and correctly formatted. Make sure your JSON has no missing commas or brackets, and that the endpoint you’re calling actually works when tested separately in Postman or a browser. After correcting these fields, save the changes again—once the tool has valid data, it will publish without showing the “tool update failed” error.