GeoJSON Reader - Cannot Add Additional Attributes

I had a thought:
I could take the GeoJSON from a pull and edit one of the events in a text editor - and then load that file into a new GeoJSON Reader.  Then I could switch the source to the URL.
Trying this.

I did this - and got this as a result…
 

I don’t think I can go on from this message.  Since I changed the input path to my URL, it is not making any of the data available….
Back to the drawing board.

Hello!
If I understand correctly, you are trying to capture all possible attributes from the Weather.gov API using FME's GeoJSON reader and experiencing inconsistency with capturing data?

I would recommend using the FeatureReader transformer instead of the GeoJSON Reader. The FeatureReader is generally better at retaining more of the nested attributes compared to the GeoJSON reader, which is particularly useful for APIs with varying response structures like the Weather.gov API.

Here's a suggested workflow to address your issue:

1. Use the FeatureReader transformer (be sure to add a Creator transformer as the initiator) to retrieve data from the API. You can further detect all possible attributes by exposing all the unexposed attributes (though this may be unnecessary) by modifying the “Schema Attributes” within the Parameter .
2. Implement a SchemaScanner transformer to detect all possible attributes across multiple API responses. This will help you identify the full range of potential fields.
3. Use a ChangeDetector transformer to monitor for changes in the attribute schema between API calls. This will help you track when new attributes appear or existing ones disappear.

Hope this helps!