Unexpected error response from GitHub API 422 when attempting to create issue

When posting an issue to GitHub API V3 I am getting an unexpected response. Namely 422 Unprocessable Entity. However the detail of the error is for the Search endpoint rather that the POST create endpoint. {"message":"Validation Failed","errors":[{"resource":"Search","field":"q","code":"missing"}],"documentation_url":"https://developer.github.com/v3/search"}

My instinct is that I have messed up the json but it is pretty simple and I can't see the issue. I have tried various solutions posted here and elsewhere but not found what I am doing wrong. This is a coding exercise rather than anything intended for production but driving me mildly insane.

Tested in Debug what the Request body is just before being posted. {"title":"Hello World","body":"dfsdfsdf\n"}
Tried removing the body as it is optional, same issue.
Tested in Debug that request is of type POST
Tested in Debug that authorization header is correct.
Removed authorization key and received 401 as expected.

The posting function:

func CreateIssue (issue *NewIssue) (*IssueDetailsResult, error){
issueJson, err := json.Marshal(issue)
if err != nil {
    log.Fatal(err)
    os.Exit(1)
}
req, err := http.NewRequest("POST", github.IssuesURL, bytes.NewBuffer(issueJson))
req.Header.Set("Authorization", "token "+os.Getenv("UPGITUSER"))
req.Header.Set( "Content-Type", "application/json")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
    log.Fatal(err)
    os.Exit(1)
}
if resp.StatusCode != http.StatusCreated {
    bodyBytes, _ := ioutil.ReadAll(resp.Body)
    body := string(bodyBytes)
    resp.Body.Close()
    return nil, fmt.Errorf("create issue failed:%s", resp.Status + "\ntext: " + body)
}
var result IssueDetailsResult
if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
    resp.Body.Close()
    return nil, err
}
resp.Body.Close()
return &result, nil

}

Would expect 201 from GitHubAPI.

Solution

The response is a strong indicator that the request is being sent to the wrong endpoint.

You can use net/http/httputil's DumpRequestOut to inspect the requests you are about to send and to ensure that they are what you expect them to be.