DataSource.Error: The underlying connection was closed: An unexpected error occurred on a receive.

Hi threw001 

The connection to this API is public, so it should be set to Anonymous in Power BI.
If you are receiving the error:
DataSource.Error: The underlying connection was closed: An unexpected error occurred on a receive

Try the following steps:

1. Verify API Availability
Open http://worldtimeapi.org/api/ in your browser to confirm it is accessible.
If not, the issue might be with the API or your device/network settings.

2. Switch to HTTPS
Update the URL to https://worldtimeapi.org/api/ instead of http.
Some networks or devices block HTTP traffic.

3. Set Anonymous Access

Go to Power BI > File > Options and settings > Data Source Settings.
Locate the API connection and click Edit Permissions.
Set the authentication method to Anonymous and save.
Verify Query in Advanced Editor
4. Ensure the M code is correct:

let
Source = Json.Document(Web.Contents("http://worldtimeapi.org/api/"))
in
Source
5. Check Network Configuration
6.Ensure no firewall or antivirus is blocking the connection.

If none of these steps resolve the issue, the problem is outside of Power BI and likely related to the API itself.
In this case, it is recommended to contact the website’s support team for assistance.

If this post helps, then please consider Accepting it as the solution to help the other members find it more quickly.