Anti-fraud tests fail immediately due to 503 from heimdall

I input values for the tests. When I select the “Run Tests” button, a message is never sent to the specified url. Before that happens, an OPTION and then a POST both fail with a 503.

CORS 503
Service Unavailable: Back-end server is at capacity

OPTIONS /api/antifraud-provider/execute-test HTTP/1.1
Host: heimdall.vtexpayments.com.br
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/111.0
Accept: /
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Access-Control-Request-Method: POST
Access-Control-Request-Headers: content-type
Referer: https://{snipped}.myvtex.com/
Origin: https://{snipped}.myvtex.com
Connection: keep-alive
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site

POST /api/antifraud-provider/execute-test undefined
Host: heimdall.vtexpayments.com.br
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:109.0) Gecko/20100101 Firefox/111.0
Accept: application/json
Accept-Language: en-US,en;q=0.5
Accept-Encoding: gzip, deflate, br
Referer: https://{snipped}.myvtex.com/
Content-Type: application/json
Content-Length: 281
Origin: https://{snipped}.myvtex.com
Connection: keep-alive
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: cross-site

Hello Brett,

Looking into that request, I am not finding it or anything similar in our documentation for APIs or Anti-Fraud providers.

Could you go into further detail on which documentation you followed in regards to this request and what is your end goal for this?

Eduardo Luciano
Field Software Engineer | VTEX

I am following these instructions

The problem still occurs. The UI fails instantly. The browser console shows:
Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://heimdall.vtexpayments.com.br/api/antifraud-provider/execute-test. (Reason: CORS request did not succeed). Status code: (null).