AUTHENTICATION_DENIED return when call confluence API

[Son Nguyen]

Sometime result return correct, sometime return "HTTP Status 401 - Basic Authentication Failure - Reason : AUTHENTICATION_DENIED". I think API work unstable(Postman same)

I had used API : https://instance-name.atlassian.net/wiki/rest/api/content/pageId?expand=body.storage

 I had double with curl, restclient but both of them cannot get correct result

My ruby code :

authen = "Basic "+Base64.encode64( 'email:pass')
data = RestClient::Request.execute(:method => :get, :url => result_url, :headers => {"Authorization" => authen, "Accept" => "application/json, text/plain, */*"})

Anything I missing?

 Note : This code work well with API  https://instance-name.atlassian.net/rest/api/2/issue/issue-key

[#2]

Sometime result return correct, sometime return "HTTP Status 401 - Basic Authentication Failure - Reason : AUTHENTICATION_DENIED". I think API work unstable(Postman same)

I had used API : https://instance-name.atlassian.net/wiki/rest/api/content/pageId?expand=body.storage

 I had double with curl, restclient but both of them cannot get correct result

My ruby code :

authen = "Basic "+Base64.encode64( 'email:pass')
data = RestClient::Request.execute(:method => :get, :url => result_url, :headers => {"Authorization" => authen, "Accept" => "application/json, text/plain, */*"})

Anything I missing?

 Note : This code work well with API  https://instance-name.atlassian.net/rest/api/2/issue/issue-key

[lukasgotter]

I run into the same issue. Sometimes getting AUTHENTICATION_DENIED from the Api.

Reason is that after three failed logins the Api enables the captcha and the request fails.

By default, Captcha for failed logins is enabled and the number of failed login attempts is set to three.

To configure / disable this behavior see https://confluence.atlassian.com/doc/configuring-captcha-for-failed-logins-216957808.html