diff --git a/Provider.php b/Provider.php
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+++ b/Provider.php
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+<?php
+
+namespace SocialiteProviders\Usos;
+
+use SocialiteProviders\Manager\OAuth1\AbstractProvider;
+use SocialiteProviders\Manager\OAuth1\User;
+
+class Provider extends AbstractProvider
+{
+    /**
+     * Unique Provider Identifier.
+     */
+    public const IDENTIFIER = 'USOS';
+
+    protected function mapUserToObject(array $user)
+    {
+        return (new User())->setRaw($user['extra'])->map([
+            'id'       => $user['id'],
+            'nickname' => $user['nickname'],
+            'name'     => $user['name'],
+            'email'    => $user['email'],
+            'avatar'   => $user['avatar'],
+        ]);
+    }
+
+    public static function additionalConfigKeys()
+    {
+        return ['profile_fields_selector', 'domain'];
+    }
+}
diff --git a/README.md b/README.md
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+++ b/README.md
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+# Usos
+
+```bash
+composer require socialiteproviders/usos
+```
+
+## Installation & Basic Usage
+
+Please see the [Base Installation Guide](https://socialiteproviders.com/usage/), then follow the provider specific instructions below.
+
+### Add configuration to `config/services.php`
+
+```php
+'usos' => [
+  'domain' => env('USOS_DOMAIN_URL'), // Because of every instance of USOS is self-hosted
+  'client_id' => env('USOS_CLIENT_ID'),
+  'client_secret' => env('USOS_CLIENT_SECRET'),
+  'redirect' => env('USOS_REDIRECT_URI')
+],
+```
+
+As a default, provider loads only necessary for Socialite data. If you need to get more data during authentication process, such as student status or phone number, you may add ```profile_fields_selector``` parameter:
+
+```php
+'usos' => [
+  // ...
+  'profile_fields_selector' => env('USOS_PROFILE_FIELDS_SELECTOR'),
+  // ...
+]
+```
+
+Some fields may be not available without ```scopes``` field specifying.
+
+### Add provider event listener
+
+Configure the package's listener to listen for `SocialiteWasCalled` events.
+
+Add the event to your `listen[]` array in `app/Providers/EventServiceProvider`. See the [Base Installation Guide](https://socialiteproviders.com/usage/) for detailed instructions.
+
+```php
+protected $listen = [
+    \SocialiteProviders\Manager\SocialiteWasCalled::class => [
+        // ... other providers
+        'SocialiteProviders\\Usos\\UsosExtendSocialite@handle',
+    ],
+];
+```
+
+### Usage
+
+You should now be able to use the provider like you would regularly use Socialite (assuming you have the facade installed):
+
+```php
+return Socialite::driver('usos')->redirect();
+```
+
+You also can use USOS scopes via Socialite ```scopes``` method:
+
+```php
+return Socialite::driver('usos')
+    ->scopes(['personal', 'email'])
+    ->redirect();
+```
+
+To get more information about ```scopes``` you may visit a documentation page at yours USOS instance, or at the [USOSapi Mother server webpage](https://apps.usos.edu.pl/developers/api/authorization/).
diff --git a/Server.php b/Server.php
new file mode 100644
index 0000000..fb28a69
--- /dev/null
+++ b/Server.php
@@ -0,0 +1,172 @@
+<?php
+
+namespace SocialiteProviders\Usos;
+
+use GuzzleHttp\Exception\BadResponseException;
+use League\OAuth1\Client\Credentials\CredentialsException;
+use League\OAuth1\Client\Credentials\TemporaryCredentials;
+use League\OAuth1\Client\Credentials\TokenCredentials;
+use SocialiteProviders\Manager\OAuth1\Server as BaseServer;
+use SocialiteProviders\Manager\OAuth1\User;
+
+class Server extends BaseServer
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function urlTemporaryCredentials()
+    {
+        return $this->getDomain().'/services/oauth/request_token';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function urlAuthorization()
+    {
+        return $this->getDomain().'/services/oauth/authorize';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function urlTokenCredentials()
+    {
+        return $this->getDomain().'/services/oauth/access_token';
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function urlUserDetails()
+    {
+        return $this->getDomain().'/services/users/user'.'?fields='.$this->getFieldsSelector();
+    }
+
+    /*
+     * Returns an instance domain, according to the environment configuration
+     */
+    private function getDomain()
+    {
+        return $this->getConfig('domain');
+    }
+
+    /*
+     * Returns a fields selector for services/users/user method, which defines a list of fields,
+     * which will be returned from API endpoint.
+     */
+    private function getFieldsSelector()
+    {
+        return $this->getConfig('profile_fields_selector', 'id|first_name|last_name|email|photo_urls');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function userDetails($data, TokenCredentials $tokenCredentials)
+    {
+        $user = new User();
+        $user->id = $data['id'];
+        $user->nickname = $data['first_name'].' '.$data['last_name'];
+        $user->name = $data['first_name'].' '.$data['last_name'];
+        $user->avatar = $data['photo_urls']['50x50'] ?? null;
+        $user->email = $data['email'] ?? null;
+
+        $user->extra = $data;
+
+        return $user;
+    }
+
+    /**
+     * Generate the OAuth protocol header for a temporary credentials
+     * request, based on the URI.
+     *
+     * @param string $uri
+     *
+     * @return string
+     */
+    protected function temporaryCredentialsProtocolHeader($uri)
+    {
+        $parameters = array_merge($this->baseProtocolParameters(), array_merge([
+            'oauth_callback' => $this->clientCredentials->getCallbackUri(),
+
+        ], ['scopes' => implode('|', $this->scopes)]));
+
+        $parameters['oauth_signature'] = $this->signature->sign($uri, $parameters, 'POST');
+
+        return $this->normalizeProtocolParameters($parameters);
+    }
+
+    public function getTemporaryCredentials()
+    {
+        $uri = $this->urlTemporaryCredentials();
+
+        $client = $this->createHttpClient();
+
+        $formParams = [
+            'scopes' => implode('|', $this->scopes),
+        ];
+
+        $header = $this->temporaryCredentialsProtocolHeader($uri);
+        $authorizationHeader = ['Authorization' => $header];
+        $headers = $this->buildHttpClientHeaders($authorizationHeader);
+
+        try {
+            $response = $client->post($uri, [
+                'headers'     => $headers,
+                'form_params' => $formParams,
+            ]);
+
+            return $this->createTemporaryCredentials((string) $response->getBody());
+        } catch (BadResponseException $e) {
+            $this->handleTemporaryCredentialsBadResponse($e);
+        }
+
+        throw new CredentialsException('Failed to get temporary credentials');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function userUid($data, TokenCredentials $tokenCredentials)
+    {
+        return $data['id'];
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function userEmail($data, TokenCredentials $tokenCredentials)
+    {
+        return $data['email'] ?? null;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function userScreenName($data, TokenCredentials $tokenCredentials)
+    {
+        return $data['screen_name'] ?? null;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getAuthorizationUrl($temporaryIdentifier, array $options = [])
+    {
+        // Somebody can pass through an instance of temporary
+        // credentials, and we'll extract the identifier from there.
+        if ($temporaryIdentifier instanceof TemporaryCredentials) {
+            $temporaryIdentifier = $temporaryIdentifier->getIdentifier();
+        }
+        $queryOauthToken = ['oauth_token' => $temporaryIdentifier];
+        $parameters = (isset($this->parameters))
+            ? array_merge($queryOauthToken, $this->parameters)
+            : $queryOauthToken;
+
+        $url = $this->urlAuthorization();
+        $queryString = http_build_query($parameters);
+
+        return $this->buildUrl($url, $queryString);
+    }
+}
diff --git a/UsosExtendSocialite.php b/UsosExtendSocialite.php
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index 0000000..93bbb9f
--- /dev/null
+++ b/UsosExtendSocialite.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace SocialiteProviders\Usos;
+
+use SocialiteProviders\Manager\SocialiteWasCalled;
+
+class UsosExtendSocialite
+{
+    /**
+     * Register the provider.
+     *
+     * @param SocialiteWasCalled $socialiteWasCalled
+     */
+    public function handle(SocialiteWasCalled $socialiteWasCalled): void
+    {
+        $socialiteWasCalled->extendSocialite('usos', Provider::class, Server::class);
+    }
+}
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..e8787a1
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,34 @@
+{
+    "name": "socialiteproviders/usos",
+    "description": "USOS OAuth1 Provider for Laravel Socialite",
+    "license": "MIT",
+    "keywords": [
+        "laravel",
+        "oauth",
+        "provider",
+        "socialite",
+        "USOS",
+        "Uniwersytecki System Obsługi Studiów"
+    ],
+    "authors": [
+        {
+            "name": "Władysław Mostowicz",
+            "email": "mostovyv@uek.krakow.pl"
+        }
+    ],
+    "support": {
+        "issues": "https://github.com/socialiteproviders/providers/issues",
+        "source": "https://github.com/socialiteproviders/providers",
+        "docs": "https://socialiteproviders.com/usos"
+    },
+    "require": {
+        "php": "^8.0",
+        "ext-json": "*",
+        "socialiteproviders/manager": "~4.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "SocialiteProviders\\Usos\\": ""
+        }
+    }
+}