WEB API 403 Error

 Hi,
i have a problem while i try to create web api by follow the:
https://docs.appian.com/suite/help/18.1/Service-Backed_Record_Tutorial.html

as i check example API from Sunlight Foundation is not available anymore, but as i understand well same API is available in other place, details here:

https://sunlightfoundation.com/api/

and

https://projects.propublica.org/api-docs/congress-api/

also result in integration when i try to "test request"

You are not permitted to perform the requested operation

error-result-guidance
The external system understood the request but refused to authorize it
HTTP/1.1 403 Forbidden

Next Steps

Make sure you are using the correct credentials for this external system
Check the request and response for more details
Review the external system’s documentation for information on what may have caused the problem


this is my http request:

GET /congress/v1/?apikey=cons%21LEGISLATOR_API_URL&fields=cons%21LEGISLATOR_SERVICE_FIELDS_TO_RETRIEVE&page=1&per_page=50&order=bioguide_id__asc HTTP/1.1
Host: api.propublica.org
Connection: Keep-Alive
User-Agent: Appian
Accept-Encoding: gzip,deflate


this is my http response

GET /congress/v1/?apikey=cons%21LEGISLATOR_API_URL&fields=cons%21LEGISLATOR_SERVICE_FIELDS_TO_RETRIEVE&page=1&per_page=50&order=bioguide_id__asc HTTP/1.1
Host: api.propublica.org
Connection: Keep-Alive
User-Agent: Appian
Accept-Encoding: gzip,deflate




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