# 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.