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FusionAuth Go Client Library!
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FusionAuth Go Client semver 2.0.0 compliant

Use this client to access the FusionAuth APIs in your Go application. For additional information and documentation on FusionAuth refer to


  • @medhir Thank you for the initial commit and initial implementation of the Go client!
  • The FusionAuth team - couldn't have done it without you!


go get

Example Usage

The following example uses the FusionAuth Go client to create a request handling function that logs in a user:

package example

import (

	client ""

const host = "http://localhost:9011"

var httpClient = &http.Client{
	Timeout: time.Second * 10}

var baseURL, _ = url.Parse(host)

// Construct a new FusionAuth Client
var auth = &client.FusionAuthClient{
	BaseURL:    baseURL,
	APIKey:     apiKey,
	HTTPClient: httpClient}

// Credentials describes the JSON request for a user login
type Credentials struct {
	LoginID  string `json:"loginId"`
	Password string `json:"password"`

// Login logs in the user using the FusionAuth Go client library
func Login() http.HandlerFunc {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		// Read response body
		var credentials Credentials
		defer r.Body.Close()
		// Use FusionAuth Go client to log in the user
		authResponse, err := auth.Login(credentials)
		if err != nil {
			http.Error(w, err.Error(), http.StatusBadRequest)
		// Write the response from the FusionAuth client as JSON
		responseJSON, err := json.Marshal(authResponse)
		if err != nil {
			http.Error(w, err.Error(), http.StatusInternalServerError)
		w.Header().Set("Content-Type", "application/json")


Bug reports and pull requests are welcome on GitHub at

If you find an issue with syntax, etc - this is likely a bug in the template. Feel free to submit a PR against the Client Builder project.


The code is available as open source under the terms of the Apache v2.0 License.

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