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<h2>G4F - Authentication Guide</h2>
<p>This documentation explains how to authenticate with G4F providers and configure GUI security. It covers API key management, cookie-based authentication, rate limiting, and GUI access controls.</p>
<hr>
<h2><strong>Table of Contents</strong></h2>
<ol>
<li><strong><a href="#provider-authentication">Provider Authentication</a></strong>
<ul>
<li><a href="#prerequisites">Prerequisites</a></li>
<li><a href="#api-key-setup">API Key Setup</a></li>
<li><a href="#synchronous-usage">Synchronous Usage</a></li>
<li><a href="#asynchronous-usage">Asynchronous Usage</a></li>
<li><a href="#multiple-providers-with-api-keys">Multiple Providers</a></li>
<li><a href="#cookie-based-authentication">Cookie-Based Authentication</a></li>
<li><a href="#rate-limiting">Rate Limiting</a></li>
<li><a href="#error-handling">Error Handling</a></li>
<li><a href="#supported-providers">Supported Providers</a></li>
</ul>
</li>
<li><strong><a href="#gui-authentication">GUI Authentication</a></strong>
<ul>
<li><a href="#server-setup">Server Setup</a></li>
<li><a href="#browser-access">Browser Access</a></li>
<li><a href="#programmatic-access">Programmatic Access</a></li>
</ul>
</li>
<li><strong><a href="#best-practices">Best Practices</a></strong></li>
<li><strong><a href="#troubleshooting">Troubleshooting</a></strong></li>
</ol>
<hr>
<h2><strong>Provider Authentication</strong></h2>
<h3><strong>Prerequisites</strong></h3>
<ul>
<li>Python 3.7+</li>
<li>Installed <code class="notranslate">g4f</code> package:
<div class="highlight highlight-source-shell"><pre class="notranslate">pip install g4f</pre></div>
</li>
<li>API keys or cookies from providers (if required).</li>
</ul>
<hr>
<h3><strong>API Key Setup</strong></h3>
<h4><strong>Step 1: Set Environment Variables</strong></h4>
<p><strong>For Linux/macOS (Terminal)</strong>:</p>
<div class="highlight highlight-source-shell"><pre class="notranslate"><span class="pl-c"><span class="pl-c">#</span> Example for Anthropic</span>
<span class="pl-k">export</span> ANTHROPIC_API_KEY=<span class="pl-s"><span class="pl-pds">"</span>your_key_here<span class="pl-pds">"</span></span>
<span class="pl-c"><span class="pl-c">#</span> Example for HuggingFace</span>
<span class="pl-k">export</span> HUGGINGFACE_API_KEY=<span class="pl-s"><span class="pl-pds">"</span>another_key_here<span class="pl-pds">"</span></span></pre></div>
<p><strong>For Windows (Command Prompt)</strong>:</p>
<div class="highlight highlight-source-batchfile"><pre class="notranslate"><span class="pl-c"><span class="pl-c">::</span> Example for Anthropic</span>
<span class="pl-k">set</span> <span class="pl-smi">ANTHROPIC_API_KEY</span><span class="pl-k">=</span>your_key_here
<span class="pl-c"><span class="pl-c">::</span> Example for HuggingFace</span>
<span class="pl-k">set</span> <span class="pl-smi">HUGGINGFACE_API_KEY</span><span class="pl-k">=</span>another_key_here</pre></div>
<p><strong>For Windows (PowerShell)</strong>:</p>
<div class="highlight highlight-source-powershell"><pre class="notranslate"><span class="pl-c"><span class="pl-c">#</span> Example for Anthropic</span>
<span class="pl-smi">$<span class="pl-c1">env:</span>ANTHROPIC_API_KEY</span> <span class="pl-k">=</span> <span class="pl-s"><span class="pl-pds">"</span>your_key_here<span class="pl-pds">"</span></span>
<span class="pl-c"><span class="pl-c">#</span> Example for HuggingFace</span>
<span class="pl-smi">$<span class="pl-c1">env:</span>HUGGINGFACE_API_KEY</span> <span class="pl-k">=</span> <span class="pl-s"><span class="pl-pds">"</span>another_key_here<span class="pl-pds">"</span></span></pre></div>
<h4><strong>Step 2: Initialize Client</strong></h4>
<div class="highlight highlight-source-python"><pre class="notranslate"><span class="pl-k">from</span> <span class="pl-s1">g4f</span>.<span class="pl-s1">client</span> <span class="pl-k">import</span> <span class="pl-v">Client</span>
<span class="pl-c"># Example for Anthropic</span>
<span class="pl-s1">client</span> <span class="pl-c1">=</span> <span class="pl-en">Client</span>(
<span class="pl-s1">provider</span><span class="pl-c1">=</span><span class="pl-s">"g4f.Provider.Anthropic"</span>,
<span class="pl-s1">api_key</span><span class="pl-c1">=</span><span class="pl-s">"your_key_here"</span> <span class="pl-c"># Or use os.getenv("ANTHROPIC_API_KEY")</span>
)</pre></div>
<hr>
<h3><strong>Synchronous Usage</strong></h3>
<div class="highlight highlight-source-python"><pre class="notranslate"><span class="pl-k">from</span> <span class="pl-s1">g4f</span>.<span class="pl-s1">client</span> <span class="pl-k">import</span> <span class="pl-v">Client</span>
<span class="pl-c"># Initialize with Anthropic</span>
<span class="pl-s1">client</span> <span class="pl-c1">=</span> <span class="pl-en">Client</span>(<span class="pl-s1">provider</span><span class="pl-c1">=</span><span class="pl-s">"g4f.Provider.Anthropic"</span>, <span class="pl-s1">api_key</span><span class="pl-c1">=</span><span class="pl-s">"your_key_here"</span>)
<span class="pl-c"># Simple request</span>
<span class="pl-s1">response</span> <span class="pl-c1">=</span> <span class="pl-s1">client</span>.<span class="pl-c1">chat</span>.<span class="pl-c1">completions</span>.<span class="pl-c1">create</span>(
<span class="pl-s1">model</span><span class="pl-c1">=</span><span class="pl-s">"claude-3.5-sonnet"</span>,
<span class="pl-s1">messages</span><span class="pl-c1">=</span>[{<span class="pl-s">"role"</span>: <span class="pl-s">"user"</span>, <span class="pl-s">"content"</span>: <span class="pl-s">"Hello!"</span>}]
)
<span class="pl-en">print</span>(<span class="pl-s1">response</span>.<span class="pl-c1">choices</span>[<span class="pl-c1">0</span>].<span class="pl-c1">message</span>.<span class="pl-c1">content</span>)</pre></div>
<hr>
<h3><strong>Asynchronous Usage</strong></h3>
<div class="highlight highlight-source-python"><pre class="notranslate"><span class="pl-k">import</span> <span class="pl-s1">asyncio</span>
<span class="pl-k">from</span> <span class="pl-s1">g4f</span>.<span class="pl-s1">client</span> <span class="pl-k">import</span> <span class="pl-v">AsyncClient</span>
<span class="pl-k">async</span> <span class="pl-k">def</span> <span class="pl-en">main</span>():
<span class="pl-c"># Initialize with Groq</span>
<span class="pl-s1">client</span> <span class="pl-c1">=</span> <span class="pl-en">AsyncClient</span>(<span class="pl-s1">provider</span><span class="pl-c1">=</span><span class="pl-s">"g4f.Provider.Groq"</span>, <span class="pl-s1">api_key</span><span class="pl-c1">=</span><span class="pl-s">"your_key_here"</span>)
<span class="pl-s1">response</span> <span class="pl-c1">=</span> <span class="pl-k">await</span> <span class="pl-s1">client</span>.<span class="pl-c1">chat</span>.<span class="pl-c1">completions</span>.<span class="pl-c1">create</span>(
<span class="pl-s1">model</span><span class="pl-c1">=</span><span class="pl-s">"mixtral-8x7b"</span>,
<span class="pl-s1">messages</span><span class="pl-c1">=</span>[{<span class="pl-s">"role"</span>: <span class="pl-s">"user"</span>, <span class="pl-s">"content"</span>: <span class="pl-s">"Hello!"</span>}]
)
<span class="pl-en">print</span>(<span class="pl-s1">response</span>.<span class="pl-c1">choices</span>[<span class="pl-c1">0</span>].<span class="pl-c1">message</span>.<span class="pl-c1">content</span>)
<span class="pl-s1">asyncio</span>.<span class="pl-c1">run</span>(<span class="pl-en">main</span>())</pre></div>
<hr>
<h3><strong>Multiple Providers with API Keys</strong></h3>
<div class="highlight highlight-source-python"><pre class="notranslate"><span class="pl-k">import</span> <span class="pl-s1">os</span>
<span class="pl-k">import</span> <span class="pl-s1">g4f</span>.<span class="pl-v">Provider</span>
<span class="pl-k">from</span> <span class="pl-s1">g4f</span>.<span class="pl-s1">client</span> <span class="pl-k">import</span> <span class="pl-v">Client</span>
<span class="pl-c"># Using environment variables</span>
<span class="pl-s1">providers</span> <span class="pl-c1">=</span> {
<span class="pl-s">"Anthropic"</span>: <span class="pl-s1">os</span>.<span class="pl-c1">getenv</span>(<span class="pl-s">"ANTHROPIC_API_KEY"</span>),
<span class="pl-s">"Groq"</span>: <span class="pl-s1">os</span>.<span class="pl-c1">getenv</span>(<span class="pl-s">"GROQ_API_KEY"</span>)
}
<span class="pl-k">for</span> <span class="pl-s1">provider_name</span>, <span class="pl-s1">api_key</span> <span class="pl-c1">in</span> <span class="pl-s1">providers</span>.<span class="pl-c1">items</span>():
<span class="pl-s1">client</span> <span class="pl-c1">=</span> <span class="pl-en">Client</span>(<span class="pl-s1">provider</span><span class="pl-c1">=</span><span class="pl-en">getattr</span>(<span class="pl-s1">g4f</span>.<span class="pl-c1">Provider</span>, <span class="pl-s1">provider_name</span>), <span class="pl-s1">api_key</span><span class="pl-c1">=</span><span class="pl-s1">api_key</span>)
<span class="pl-s1">response</span> <span class="pl-c1">=</span> <span class="pl-s1">client</span>.<span class="pl-c1">chat</span>.<span class="pl-c1">completions</span>.<span class="pl-c1">create</span>(
<span class="pl-s1">model</span><span class="pl-c1">=</span><span class="pl-s">"claude-3.5-sonnet"</span>,
<span class="pl-s1">messages</span><span class="pl-c1">=</span>[{<span class="pl-s">"role"</span>: <span class="pl-s">"user"</span>, <span class="pl-s">"content"</span>: <span class="pl-s">f"Hello to <span class="pl-s1"><span class="pl-kos">{</span><span class="pl-s1">provider_name</span><span class="pl-kos">}</span></span>!"</span>}]
)
<span class="pl-en">print</span>(<span class="pl-s">f"<span class="pl-s1"><span class="pl-kos">{</span><span class="pl-s1">provider_name</span><span class="pl-kos">}</span></span>: <span class="pl-s1"><span class="pl-kos">{</span><span class="pl-s1">response</span>.<span class="pl-c1">choices</span>[<span class="pl-c1">0</span>].<span class="pl-c1">message</span>.<span class="pl-c1">content</span><span class="pl-kos">}</span></span>"</span>)</pre></div>
<hr>
<h3><strong>Cookie-Based Authentication</strong></h3>
<p><strong>For Providers Like Gemini/Bing</strong>:</p>
<ol>
<li>Open your browser and log in to the provider's website.</li>
<li>Use developer tools (F12) to copy cookies:
<ul>
<li>Chrome/Edge: <strong>Application</strong> → <strong>Cookies</strong></li>
<li>Firefox: <strong>Storage</strong> → <strong>Cookies</strong></li>
</ul>
</li>
</ol>
<div class="highlight highlight-source-python"><pre class="notranslate"><span class="pl-k">from</span> <span class="pl-s1">g4f</span>.<span class="pl-s1">client</span> <span class="pl-k">import</span> <span class="pl-v">Client</span>
<span class="pl-k">from</span> <span class="pl-s1">g4f</span>.<span class="pl-v">Provider</span> <span class="pl-k">import</span> <span class="pl-v">Gemini</span>
<span class="pl-c"># Using with cookies</span>
<span class="pl-s1">client</span> <span class="pl-c1">=</span> <span class="pl-en">Client</span>(
<span class="pl-s1">provider</span><span class="pl-c1">=</span><span class="pl-v">Gemini</span>,
)
<span class="pl-s1">response</span> <span class="pl-c1">=</span> <span class="pl-s1">client</span>.<span class="pl-c1">chat</span>.<span class="pl-c1">completions</span>.<span class="pl-c1">create</span>(
<span class="pl-s1">model</span><span class="pl-c1">=</span><span class="pl-s">""</span>, <span class="pl-c"># Default model</span>
<span class="pl-s1">messages</span><span class="pl-c1">=</span><span class="pl-s">"Hello Google"</span>,
<span class="pl-s1">cookies</span><span class="pl-c1">=</span>{
<span class="pl-s">"__Secure-1PSID"</span>: <span class="pl-s">"your_cookie_value_here"</span>,
<span class="pl-s">"__Secure-1PSIDTS"</span>: <span class="pl-s">"your_cookie_value_here"</span>
}
)
<span class="pl-en">print</span>(<span class="pl-s">f"Gemini: <span class="pl-s1"><span class="pl-kos">{</span><span class="pl-s1">response</span>.<span class="pl-c1">choices</span>[<span class="pl-c1">0</span>].<span class="pl-c1">message</span>.<span class="pl-c1">content</span><span class="pl-kos">}</span></span>"</span>)</pre></div>
<hr>
<h3><strong>Rate Limiting</strong></h3>
<div class="highlight highlight-source-python"><pre class="notranslate"><span class="pl-k">from</span> <span class="pl-s1">aiolimiter</span> <span class="pl-k">import</span> <span class="pl-v">AsyncLimiter</span>
<span class="pl-c"># Limit to 5 requests per second</span>
<span class="pl-s1">rate_limiter</span> <span class="pl-c1">=</span> <span class="pl-en">AsyncLimiter</span>(<span class="pl-s1">max_rate</span><span class="pl-c1">=</span><span class="pl-c1">5</span>, <span class="pl-s1">time_period</span><span class="pl-c1">=</span><span class="pl-c1">1</span>)
<span class="pl-k">async</span> <span class="pl-k">def</span> <span class="pl-en">make_request</span>():
<span class="pl-k">async</span> <span class="pl-k">with</span> <span class="pl-s1">rate_limiter</span>:
<span class="pl-k">return</span> <span class="pl-k">await</span> <span class="pl-s1">client</span>.<span class="pl-c1">chat</span>.<span class="pl-c1">completions</span>.<span class="pl-c1">create</span>(...)</pre></div>
<hr>
<h3><strong>Error Handling</strong></h3>
<div class="highlight highlight-source-python"><pre class="notranslate"><span class="pl-k">from</span> <span class="pl-s1">tenacity</span> <span class="pl-k">import</span> <span class="pl-s1">retry</span>, <span class="pl-s1">stop_after_attempt</span>, <span class="pl-s1">wait_exponential</span>
<span class="pl-en">@<span class="pl-en">retry</span>(<span class="pl-s1">stop</span><span class="pl-c1">=</span><span class="pl-en">stop_after_attempt</span>(<span class="pl-c1">3</span>), <span class="pl-s1">wait</span><span class="pl-c1">=</span><span class="pl-en">wait_exponential</span>(<span class="pl-s1">multiplier</span><span class="pl-c1">=</span><span class="pl-c1">1</span>, <span class="pl-s1">min</span><span class="pl-c1">=</span><span class="pl-c1">4</span>, <span class="pl-s1">max</span><span class="pl-c1">=</span><span class="pl-c1">10</span>))</span>
<span class="pl-k">def</span> <span class="pl-en">safe_request</span>():
<span class="pl-k">try</span>:
<span class="pl-k">return</span> <span class="pl-s1">client</span>.<span class="pl-c1">chat</span>.<span class="pl-c1">completions</span>.<span class="pl-c1">create</span>(...)
<span class="pl-k">except</span> <span class="pl-v">Exception</span> <span class="pl-k">as</span> <span class="pl-s1">e</span>:
<span class="pl-en">print</span>(<span class="pl-s">f"Attempt failed: <span class="pl-s1"><span class="pl-kos">{</span><span class="pl-en">str</span>(<span class="pl-s1">e</span>)<span class="pl-kos">}</span></span>"</span>)
<span class="pl-k">raise</span></pre></div>
<hr>
<h3><strong>Supported Providers</strong></h3>
<markdown-accessiblity-table><table role="table">
<thead>
<tr>
<th>Provider</th>
<th>Auth Type</th>
<th>Example Models</th>
</tr>
</thead>
<tbody>
<tr>
<td>Anthropic</td>
<td>API Key</td>
<td><code class="notranslate">claude-3.5-sonnet</code></td>
</tr>
<tr>
<td>Gemini</td>
<td>Cookies</td>
<td><code class="notranslate">gemini-1.5-pro</code></td>
</tr>
<tr>
<td>Groq</td>
<td>API Key</td>
<td><code class="notranslate">mixtral-8x7b</code></td>
</tr>
<tr>
<td>HuggingFace</td>
<td>API Key</td>
<td><code class="notranslate">llama-3.1-70b</code></td>
</tr>
</tbody>
</table></markdown-accessiblity-table>
<p><em>Full list: <a href="providers-and-models.html">Providers and Models</a></em></p>
<hr>
<h2><strong>GUI Authentication</strong></h2>
<h3><strong>Server Setup</strong></h3>
<ol>
<li>Create a password:
<div class="highlight highlight-source-shell"><pre class="notranslate"><span class="pl-c"><span class="pl-c">#</span> Linux/macOS</span>
<span class="pl-k">export</span> G4F_API_KEY=<span class="pl-s"><span class="pl-pds">"</span>your_password_here<span class="pl-pds">"</span></span>
<span class="pl-c"><span class="pl-c">#</span> Windows (Command Prompt)</span>
<span class="pl-c1">set</span> G4F_API_KEY=your_password_here
<span class="pl-c"><span class="pl-c">#</span> Windows (PowerShell)</span>
<span class="pl-smi">$env</span>:G4F_API_KEY = <span class="pl-s"><span class="pl-pds">"</span>your_password_here<span class="pl-pds">"</span></span></pre></div>
</li>
<li>Start the server:
<div class="highlight highlight-source-shell"><pre class="notranslate">python -m g4f --debug --port 8080 --g4f-api-key <span class="pl-smi">$G4F_API_KEY</span></pre></div>
</li>
</ol>
<hr>
<h3><strong>Browser Access</strong></h3>
<ol>
<li>Navigate to <code class="notranslate">http://localhost:8080/chat/</code>.</li>
<li>Use credentials:
<ul>
<li><strong>Username</strong>: Any value (e.g., <code class="notranslate">admin</code>).</li>
<li><strong>Password</strong>: Your <code class="notranslate">G4F_API_KEY</code>.</li>
</ul>
</li>
</ol>
<hr>
<h3><strong>Programmatic Access</strong></h3>
<div class="highlight highlight-source-python"><pre class="notranslate"><span class="pl-k">import</span> <span class="pl-s1">requests</span>
<span class="pl-s1">response</span> <span class="pl-c1">=</span> <span class="pl-s1">requests</span>.<span class="pl-c1">get</span>(
<span class="pl-s">"http://localhost:8080/chat/"</span>,
<span class="pl-s1">auth</span><span class="pl-c1">=</span>(<span class="pl-s">"admin"</span>, <span class="pl-s">"your_password_here"</span>)
)
<span class="pl-en">print</span>(<span class="pl-s">"Success!"</span> <span class="pl-k">if</span> <span class="pl-s1">response</span>.<span class="pl-c1">status_code</span> <span class="pl-c1">==</span> <span class="pl-c1">200</span> <span class="pl-k">else</span> <span class="pl-s">f"Failed: <span class="pl-s1"><span class="pl-kos">{</span><span class="pl-s1">response</span>.<span class="pl-c1">status_code</span><span class="pl-kos">}</span></span>"</span>)</pre></div>
<hr>
<h2><strong>Best Practices</strong></h2>
<ol>
<li>🔒 <strong>Never hardcode keys</strong>
<ul>
<li>Use <code class="notranslate">.env</code> files or secret managers like AWS Secrets Manager.</li>
</ul>
</li>
<li>🔄 <strong>Rotate keys every 90 days</strong>
<ul>
<li>Especially critical for production environments.</li>
</ul>
</li>
<li>📊 <strong>Monitor API usage</strong>
<ul>
<li>Use tools like Prometheus/Grafana for tracking.</li>
</ul>
</li>
<li>♻️ <strong>Retry transient errors</strong>
<ul>
<li>Use the <code class="notranslate">tenacity</code> library for robust retry logic.</li>
</ul>
</li>
</ol>
<hr>
<h2><strong>Troubleshooting</strong></h2>
<markdown-accessiblity-table><table role="table">
<thead>
<tr>
<th>Issue</th>
<th>Solution</th>
</tr>
</thead>
<tbody>
<tr>
<td><strong>"Invalid API Key"</strong></td>
<td>1. Verify key spelling<br>2. Regenerate key in provider dashboard</td>
</tr>
<tr>
<td><strong>"Cookie Expired"</strong></td>
<td>1. Re-login to provider website<br>2. Update cookie values</td>
</tr>
<tr>
<td><strong>"Rate Limit Exceeded"</strong></td>
<td>1. Implement rate limiting<br>2. Upgrade provider plan</td>
</tr>
<tr>
<td><strong>"Provider Not Found"</strong></td>
<td>1. Check provider name spelling<br>2. Verify provider compatibility</td>
</tr>
</tbody>
</table></markdown-accessiblity-table>
<hr>
<p><strong><a href="providers-and-models.html">Providers and Models →</a></strong></p>
<p><strong><a href="/docs/">← Return to Documentation</a></strong></p>
<p><strong><a href="#table-of-contents">⬆ Back to Top</a></strong></p>
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