> For the complete documentation index, see [llms.txt](https://help.adalo.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.adalo.com/integrations/custom-actions/troubleshooting-custom-actions/custom-action-does-not-return-data.md).

# Custom Action Does Not Return Data

**Symptom:**\
After running a test, the response area is empty or displays no usable data.

**Reason:**\
The endpoint may not be returning valid JSON, or the API does not include a response body. Adalo can only use structured JSON responses to create Outputs.

**Solution:**\
Check your endpoint in a tool like [**Postman**](https://www.postman.com/) to make sure it returns valid JSON. Confirm the response includes the data you expect and uses proper formatting with opening and closing brackets. If the request triggers a workflow in Make, ensure the scenario is configured to return data back to Adalo.


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