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Transition issue via API returning a 400

I'm trying to transition issues via the API using .NET but I'm consistently getting a 400 error back. I'm wondering if anyone can see anything obvious that I'm doing wrong?


string example = @"{
""id"": ""221""

string ticketjson = JsonConvert.SerializeObject(example); 

string postUrl = "https://myurl/rest/api/2/issue/" + issueKey + "/transitions";
System.Net.Http.HttpClient client = new System.Net.Http.HttpClient();
client.BaseAddress = new System.Uri(postUrl);
byte[] cred = UTF8Encoding.UTF8.GetBytes("username:pwd");
client.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", Convert.ToBase64String(cred));
client.DefaultRequestHeaders.Accept.Add(new System.Net.Http.Headers.MediaTypeWithQualityHeaderValue("application/json"));

var content = new StringContent(ticketjson, Encoding.UTF8, "application/json");
var response = client.PostAsync(postUrl, content).Result;
if (response.IsSuccessStatusCode)
string result = response.Content.ReadAsStringAsync().Result;

return result;
unauth.Text = "There has been a problem submitting your comment. Please try again.";
return response.StatusCode.ToString();


The transition exists and when I go to the postUrl I can see it: 


Any help would be appreciated!

1 answer

0 votes

Hi @HLH ,

as specified here , error 400 means that there's no transition specified.

Please specify just transition id and not other values like name ,to ...


}, "transition": { "id": "5" },


Take a look to the provided example.


Hi @Fabio Racobaldo _Herzum_ 

Thanks for your response :) 

I think that's what I'm doing? This is the code that I'm passing to it. Is this id the correct one? I'd assumed from the screenshot that I included that because it as top level it was the correct id to reference, but maybe not! 

string example = @"{
""id"": ""221""

 I then convert it to json and pass it to the post: 

string ticketjson = JsonConvert.SerializeObject(example);  


Please could you check, through the log file, request structure sent to JIRA?

Hi, is it the atlassian-jira.log file? Sorry haven't used the log files much before! 

I can find other rest api calls in there for /comment, but nothing for /transitions or the specific issue key so I might be in the wrong place!

take a look to the <JIRA HOME Folder>/log/atlassian-jira.log file in order to figure out what is the error and to figure out if the call has correctly managed by JIRA

Like HLH likes this

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