Call Your API Using the Hybrid Flow

Call Your API Using the Hybrid Flow

Auth0 makes it easy for your app to implement the Authorization Code Flow using:

  • Authentication API: If you prefer to build your own solution, keep reading to learn how to call our API directly.

Prerequisites

Before beginning this tutorial:

  • Register your Application with Auth0.

    • Select the appropriate Application Type.

    • Add an Allowed Callback URL of {https://yourApp/callback}.

    • Make sure your Application's Grant Types include Implicit and Authorization Code. To learn how, read Update Grant Types.

    • If you want your Application to be able to use Refresh Tokens, make sure the Application's Grant Types include Refresh Token. To learn how, read Update Grant Types. To learn more about Refresh Tokens, read Refresh Tokens.

  • Register your API with Auth0

    • If you want your API to receive Refresh Tokens to allow it to obtain new tokens when the previous ones expire, enable Allow Offline Access.

Steps

  1. Authorize user: Request the user's authorization and redirect back to your app with an authorization code.

  2. Request tokens: Exchange your authorization code for tokens.

  3. Call API: Use the retrieved Access Token to call your API.

  4. Refresh tokens: Use a Refresh Token to request new tokens when the existing ones expire.

Optional: Explore sample use cases

Authorize user

This step may include one or more of the following processes:

  • Authenticating the user

  • Redirecting the user to an Identity Provider to handle authentication

  • Checking for active Single Sign-on (SSO) sessions

  • Obtaining user consent for the requested permission level, unless consent has been previously given.

To authorize the user, your app must send the user to the authorization URL.

Example authorization URL

https://{yourDomain}/authorize?
    response_type=YOUR_RESPONSE_TYPE&
    response_mode=form_post&
    client_id={yourClientId}&
    redirect_uri={https://yourApp/callback}&
    scope=SCOPE&
    audience=API_AUDIENCE&
    state=STATE&
    nonce=NONCE

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Parameters

Note that for authorizing a user when calling a custom API, you:

- must include an audience parameter - can include additional scopes supported by the target API

Parameter Name Description
response_type Denotes the kind of credential that Auth0 will return (code or token). For this flow, the value must include code, but may also include id_token, token, or id_token token. Specifically, id_token returns an ID Token, and token returns an Access Token.
response_mode Specifies the method with which response parameters should be returned. For security purposes, the value should be form_post. In this mode, response parameters will be encoded as HTML form values that are transmitted via the HTTP POST method and encoded in the body using the application/x-www-form-urlencoded format.
client_id Your application's Client ID. You can find this value in your Application Settings.
redirect_uri The URL to which Auth0 will redirect the browser after authorization has been granted by the user. The Authorization Code will be available in the code URL parameter. You must specify this URL as a valid callback URL in your Application Settings.

Warning: Per the OAuth 2.0 Specification, Auth0 removes everything after the hash and does not honor any fragments.
scope Specifies the scopes for which you want to request authorization, which dictate which claims (or user attributes) you want returned. These must be separated by a space. You can request any of the standard OpenID Connect (OIDC) scopes about users, such as profile or email, custom claims conforming to a namespaced format, or any scopes supported by the target API (e.g., read:contacts). Include offline_access to get a Refresh Token (make sure that the Allow Offline Access field is enabled in the Application Settings).
audience The unique identifier of the API your application wants to access. Use the Identifier value on the Settings tab for the API you created as part of the prerequisites for this tutorial.
state (recommended) An opaque arbitrary alphanumeric string your app adds to the initial request that Auth0 includes when redirecting back to your application. To see how to use this value to prevent cross-site request forgery (CSRF) attacks, see Mitigate CSRF Attacks With State Parameters.
nonce A cryptographically random string that your app adds to the initial request and Auth0 includes inside the ID Token, used to prevent token replay attacks.
organization (optional) ID of the organization to use when authenticating a user. When not provided, if your application is configured to Display Organization Prompt, the user will be able to enter the organization name when authenticating.
invitation (optional) Ticket ID of the organization invitation. When inviting a member to an Organization, your application should handle invitation acceptance by forwarding the invitation and organization key-value pairs when the user accepts the invitation.

As an example, your HTML snippet for your authorization URL when adding login to your app might look like:

<a href="https://{yourDomain}/authorize?
  response_type=code id_token token&
  client_id={yourClientId}&
  redirect_uri={https://yourApp/callback}&  
  scope=appointments%20contacts&
  audience=appointments:api&
  state=xyzABC123&
  nonce=eq...hPmz">
  Sign In
</a>

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Response

If all goes well, you'll receive an HTTP 302 response. The requested credentials are encoded in the body:

HTTP/1.1 302 Found
Content-Type: application/x-www-form-urlencoded
code=AUTHORIZATION_CODE&
access_token=ey...MhPw
&expires_in=7200
&token_type=Bearer
id_token=eyJ...acA&
state=xyzABC123

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Note that the returned values depend on what you requested as a response_type.

Response Type Components
code Authorization code
id_token ID Token
token Access Token (plus expires_in and token_type values)
id_token token ID Token, Access Token (plus expires_in and token_type values)

Auth0 will also return any state value you included in your call to the authorization URL.

When you decode and parse your ID token, you will notice an additional claim, c_hash, which contains a hash of the code. This claim is mandatory when an ID token is issued at the same time as a code, and you should validate it:

  1. Using the hash algorithm specified in the alg claim in the ID Token header, hash the octets of the ASCII representation of the code.

  2. Base64url-encode the left-most half of the hash.

  3. Check that the result matches the c_hash value.

Request tokens

Now that you have an Authorization Code, you must exchange it for tokens. Using the extracted Authorization Code (code) from the previous step, you will need to POST to the token URL.

The Access Token you receive in this step is the one you should use to call your API. Make sure you keep it separate from the Access Token you received in the previous step of this tutorial.

Example POST to token URL


curl --request POST \
  --url 'https://{yourDomain}/oauth/token' \
  --header 'content-type: application/x-www-form-urlencoded' \
  --data grant_type=authorization_code \
  --data 'client_id={yourClientId}' \
  --data 'client_secret={yourClientSecret}' \
  --data 'code=yourAuthorizationCode}' \
  --data 'redirect_uri={https://yourApp/callback}'

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var client = new RestClient("https://{yourDomain}/oauth/token");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddParameter("application/x-www-form-urlencoded", "grant_type=authorization_code&client_id={yourClientId}&client_secret=%7ByourClientSecret%7D&code=yourAuthorizationCode%7D&redirect_uri={https://yourApp/callback}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);

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package main

import (
	"fmt"
	"strings"
	"net/http"
	"io/ioutil"
)

func main() {

	url := "https://{yourDomain}/oauth/token"

	payload := strings.NewReader("grant_type=authorization_code&client_id={yourClientId}&client_secret=%7ByourClientSecret%7D&code=yourAuthorizationCode%7D&redirect_uri={https://yourApp/callback}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("content-type", "application/x-www-form-urlencoded")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}

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HttpResponse<String> response = Unirest.post("https://{yourDomain}/oauth/token")
  .header("content-type", "application/x-www-form-urlencoded")
  .body("grant_type=authorization_code&client_id={yourClientId}&client_secret=%7ByourClientSecret%7D&code=yourAuthorizationCode%7D&redirect_uri={https://yourApp/callback}")
  .asString();

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var axios = require("axios").default;

var options = {
  method: 'POST',
  url: 'https://{yourDomain}/oauth/token',
  headers: {'content-type': 'application/x-www-form-urlencoded'},
  data: new URLSearchParams({
    grant_type: 'authorization_code',
    client_id: '{yourClientId}',
    client_secret: '{yourClientSecret}',
    code: 'yourAuthorizationCode}',
    redirect_uri: '{https://yourApp/callback}'
  })
};

axios.request(options).then(function (response) {
  console.log(response.data);
}).catch(function (error) {
  console.error(error);
});

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/
#import <Foundation/Foundation.h>

NSDictionary *headers = @{ @"content-type": @"application/x-www-form-urlencoded" };

NSMutableData *postData = [[NSMutableData alloc] initWithData:[@"grant_type=authorization_code" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"&client_id={yourClientId}" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"&client_secret={yourClientSecret}" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"&code=yourAuthorizationCode}" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"&redirect_uri={https://yourApp/callback}" dataUsingEncoding:NSUTF8StringEncoding]];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://{yourDomain}/oauth/token"]
                                                       cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                   timeoutInterval:10.0];
[request setHTTPMethod:@"POST"];
[request setAllHTTPHeaderFields:headers];
[request setHTTPBody:postData];

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
                                            completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                if (error) {
                                                    NSLog(@"%@", error);
                                                } else {
                                                    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
                                                    NSLog(@"%@", httpResponse);
                                                }
                                            }];
[dataTask resume];

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$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://{yourDomain}/oauth/token",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "grant_type=authorization_code&client_id={yourClientId}&client_secret=%7ByourClientSecret%7D&code=yourAuthorizationCode%7D&redirect_uri={https://yourApp/callback}",
  CURLOPT_HTTPHEADER => [
    "content-type: application/x-www-form-urlencoded"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

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import http.client

conn = http.client.HTTPSConnection("")

payload = "grant_type=authorization_code&client_id={yourClientId}&client_secret=%7ByourClientSecret%7D&code=yourAuthorizationCode%7D&redirect_uri={https://yourApp/callback}"

headers = { 'content-type': "application/x-www-form-urlencoded" }

conn.request("POST", "/{yourDomain}/oauth/token", payload, headers)

res = conn.getresponse()
data = res.read()

print(data.decode("utf-8"))

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require 'uri'
require 'net/http'
require 'openssl'

url = URI("https://{yourDomain}/oauth/token")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE

request = Net::HTTP::Post.new(url)
request["content-type"] = 'application/x-www-form-urlencoded'
request.body = "grant_type=authorization_code&client_id={yourClientId}&client_secret=%7ByourClientSecret%7D&code=yourAuthorizationCode%7D&redirect_uri={https://yourApp/callback}"

response = http.request(request)
puts response.read_body

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/
import Foundation

let headers = ["content-type": "application/x-www-form-urlencoded"]

let postData = NSMutableData(data: "grant_type=authorization_code".data(using: String.Encoding.utf8)!)
postData.append("&client_id={yourClientId}".data(using: String.Encoding.utf8)!)
postData.append("&client_secret={yourClientSecret}".data(using: String.Encoding.utf8)!)
postData.append("&code=yourAuthorizationCode}".data(using: String.Encoding.utf8)!)
postData.append("&redirect_uri={https://yourApp/callback}".data(using: String.Encoding.utf8)!)

let request = NSMutableURLRequest(url: NSURL(string: "https://{yourDomain}/oauth/token")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()

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Parameters

Parameter Name Description
grant_type Set this to authorization_code.
code The authorization_code retrieved in the previous step of this tutorial.
client_id Your application's Client ID. You can find this value in your Application Settings.
client_secret Your application's Client Secret. You can find this value in your Application Settings.
redirect_uri The valid callback URL set in your Application settings. This must exactly match the redirect_uri passed to the authorization URL in the previous step of this tutorial. Note that this must be URL encoded.

Response

If all goes well, you'll receive an HTTP 200 response with a payload containing access_token, refresh_token, id_token, and token_type values:

{
  "access_token": "eyJz93a...k4laUWw",
  "refresh_token": "GEbRxBN...edjnXbL",
  "id_token": "eyJ0XAi...4faeEoQ",
  "token_type": "Bearer"
}

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ID tokens contain user information that must be decoded and extracted.

Access tokens are used to call the Auth0 Authentication API's /userinfo endpoint or another API. If you are calling your own API, the first thing your API will need to do is verify the Access token.

Refresh tokens are used to obtain a new access token or ID token after the previous one has expired. The refresh_token will only be present in the response if you included the offline_access scope and enabled Allow Offline Access for your API in the Dashboard.

Call API

To call your API from a regular web application (or similar cases in which the Client Secret can be safely stored), the application must pass the retrieved Access Token as a Bearer token in the Authorization header of your HTTP request.


curl --request GET \
  --url https://myapi.com/api \
  --header 'authorization: Bearer {accessToken}' \
  --header 'content-type: application/json'

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var client = new RestClient("https://myapi.com/api");
var request = new RestRequest(Method.GET);
request.AddHeader("content-type", "application/json");
request.AddHeader("authorization", "Bearer {accessToken}");
IRestResponse response = client.Execute(request);

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package main

import (
	"fmt"
	"net/http"
	"io/ioutil"
)

func main() {

	url := "https://myapi.com/api"

	req, _ := http.NewRequest("GET", url, nil)

	req.Header.Add("content-type", "application/json")
	req.Header.Add("authorization", "Bearer {accessToken}")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}

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HttpResponse<String> response = Unirest.get("https://myapi.com/api")
  .header("content-type", "application/json")
  .header("authorization", "Bearer {accessToken}")
  .asString();

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var axios = require("axios").default;

var options = {
  method: 'GET',
  url: 'https://myapi.com/api',
  headers: {'content-type': 'application/json', authorization: 'Bearer {accessToken}'}
};

axios.request(options).then(function (response) {
  console.log(response.data);
}).catch(function (error) {
  console.error(error);
});

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/
#import <Foundation/Foundation.h>

NSDictionary *headers = @{ @"content-type": @"application/json",
                           @"authorization": @"Bearer {accessToken}" };

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://myapi.com/api"]
                                                       cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                   timeoutInterval:10.0];
[request setHTTPMethod:@"GET"];
[request setAllHTTPHeaderFields:headers];

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
                                            completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                if (error) {
                                                    NSLog(@"%@", error);
                                                } else {
                                                    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
                                                    NSLog(@"%@", httpResponse);
                                                }
                                            }];
[dataTask resume];

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$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://myapi.com/api",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "GET",
  CURLOPT_HTTPHEADER => [
    "authorization: Bearer {accessToken}",
    "content-type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

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/
import http.client

conn = http.client.HTTPSConnection("myapi.com")

headers = {
    'content-type': "application/json",
    'authorization': "Bearer {accessToken}"
    }

conn.request("GET", "/api", headers=headers)

res = conn.getresponse()
data = res.read()

print(data.decode("utf-8"))

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/
require 'uri'
require 'net/http'
require 'openssl'

url = URI("https://myapi.com/api")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE

request = Net::HTTP::Get.new(url)
request["content-type"] = 'application/json'
request["authorization"] = 'Bearer {accessToken}'

response = http.request(request)
puts response.read_body

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/
import Foundation

let headers = [
  "content-type": "application/json",
  "authorization": "Bearer {accessToken}"
]

let request = NSMutableURLRequest(url: NSURL(string: "https://myapi.com/api")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "GET"
request.allHTTPHeaderFields = headers

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()

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Refresh tokens

You have already received a refresh token if you've been following this tutorial and completed the following:

  • configured your API to allow offline access

  • included the offline_access scope when you initiated the authentication request through the authorize endpoint.

You can use the Refresh Token to get a new access token. Usually, a user will need a new access token only after the previous one expires or when gaining access to a new resource for the first time. It's bad practice to call the endpoint to get a new access token every time you call an API, and Auth0 maintains rate limits that will throttle the amount of requests to the endpoint that can be executed using the same token from the same IP.

To refresh your token, make a POST request to the /oauth/token endpoint in the Authentication API, using grant_type=refresh_token.

Example POST to token URL


curl --request POST \
  --url 'https://{yourDomain}/oauth/token' \
  --header 'content-type: application/x-www-form-urlencoded' \
  --data grant_type=refresh_token \
  --data 'client_id={yourClientId}' \
  --data 'refresh_token={yourRefreshToken}'

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var client = new RestClient("https://{yourDomain}/oauth/token");
var request = new RestRequest(Method.POST);
request.AddHeader("content-type", "application/x-www-form-urlencoded");
request.AddParameter("application/x-www-form-urlencoded", "grant_type=refresh_token&client_id={yourClientId}&refresh_token=%7ByourRefreshToken%7D", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);

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/
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io/ioutil"
)

func main() {

	url := "https://{yourDomain}/oauth/token"

	payload := strings.NewReader("grant_type=refresh_token&client_id={yourClientId}&refresh_token=%7ByourRefreshToken%7D")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("content-type", "application/x-www-form-urlencoded")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := ioutil.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}

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HttpResponse<String> response = Unirest.post("https://{yourDomain}/oauth/token")
  .header("content-type", "application/x-www-form-urlencoded")
  .body("grant_type=refresh_token&client_id={yourClientId}&refresh_token=%7ByourRefreshToken%7D")
  .asString();

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/
var axios = require("axios").default;

var options = {
  method: 'POST',
  url: 'https://{yourDomain}/oauth/token',
  headers: {'content-type': 'application/x-www-form-urlencoded'},
  data: new URLSearchParams({
    grant_type: 'refresh_token',
    client_id: '{yourClientId}',
    refresh_token: '{yourRefreshToken}'
  })
};

axios.request(options).then(function (response) {
  console.log(response.data);
}).catch(function (error) {
  console.error(error);
});

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/
#import <Foundation/Foundation.h>

NSDictionary *headers = @{ @"content-type": @"application/x-www-form-urlencoded" };

NSMutableData *postData = [[NSMutableData alloc] initWithData:[@"grant_type=refresh_token" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"&client_id={yourClientId}" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[@"&refresh_token={yourRefreshToken}" dataUsingEncoding:NSUTF8StringEncoding]];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://{yourDomain}/oauth/token"]
                                                       cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                   timeoutInterval:10.0];
[request setHTTPMethod:@"POST"];
[request setAllHTTPHeaderFields:headers];
[request setHTTPBody:postData];

NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
                                            completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
                                                if (error) {
                                                    NSLog(@"%@", error);
                                                } else {
                                                    NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
                                                    NSLog(@"%@", httpResponse);
                                                }
                                            }];
[dataTask resume];

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$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://{yourDomain}/oauth/token",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => "grant_type=refresh_token&client_id={yourClientId}&refresh_token=%7ByourRefreshToken%7D",
  CURLOPT_HTTPHEADER => [
    "content-type: application/x-www-form-urlencoded"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

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/
import http.client

conn = http.client.HTTPSConnection("")

payload = "grant_type=refresh_token&client_id={yourClientId}&refresh_token=%7ByourRefreshToken%7D"

headers = { 'content-type': "application/x-www-form-urlencoded" }

conn.request("POST", "/{yourDomain}/oauth/token", payload, headers)

res = conn.getresponse()
data = res.read()

print(data.decode("utf-8"))

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/
require 'uri'
require 'net/http'
require 'openssl'

url = URI("https://{yourDomain}/oauth/token")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
http.verify_mode = OpenSSL::SSL::VERIFY_NONE

request = Net::HTTP::Post.new(url)
request["content-type"] = 'application/x-www-form-urlencoded'
request.body = "grant_type=refresh_token&client_id={yourClientId}&refresh_token=%7ByourRefreshToken%7D"

response = http.request(request)
puts response.read_body

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/
import Foundation

let headers = ["content-type": "application/x-www-form-urlencoded"]

let postData = NSMutableData(data: "grant_type=refresh_token".data(using: String.Encoding.utf8)!)
postData.append("&client_id={yourClientId}".data(using: String.Encoding.utf8)!)
postData.append("&refresh_token={yourRefreshToken}".data(using: String.Encoding.utf8)!)

let request = NSMutableURLRequest(url: NSURL(string: "https://{yourDomain}/oauth/token")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()

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Parameters

Parameter Name Description
grant_type Set this to refresh_token.
client_id Your application's Client ID. You can find this value in your Application Settings.
refresh_token The refresh token to use.
scope (optional) A space-delimited list of requested scope permissions. If not sent, the original scopes will be used; otherwise you can request a reduced set of scopes. Note that this must be URL encoded.

Response

If all goes well, you'll receive an HTTP 200 response with a payload containing a new access_token, its lifetime in seconds (expires_in), granted scope values, and token_type. If the scope of the initial token included openid, then the response will also include a new id_token:

{
  "access_token": "eyJ...MoQ",
  "expires_in": 86400,
  "scope": "openid offline_access",
  "id_token": "eyJ...0NE",
  "token_type": "Bearer"
}

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Sample use cases

Customize tokens

You can use rules to change the returned scopes of Access Tokens and/or add claims to Access and ID Tokens. (To learn more about rules, read Auth0 Rules.) To do so, add the following rule, which will run after the user authenticates:

function(user, context, callback) {
  // add custom claims to Access Token and ID Token
  context.accessToken['http://foo/bar'] = 'value';
  context.idToken['http://fiz/baz'] = 'some other value';
  // change scope
  context.accessToken.scope = ['array', 'of', 'strings'];
  callback(null, user, context);
}

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Scopes will be available in the token after all rules have run.

Learn more