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<p>By default, your Langflow server at <code>http://localhost:7860</code> isn't exposed to the public internet.
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||
However, you can forward Langflow server traffic with a forwarding platform like <a href="https://ngrok.com/docs/getting-started/" target="_blank" rel="noopener noreferrer">ngrok</a> or <a href="https://docs.zrok.io/docs/getting-started" target="_blank" rel="noopener noreferrer">zrok</a> to make your server public.</p>
|
||
<p>When your Langflow server is public, you can do things like <a href="#deploy-your-mcp-server-externally">deploy your Langflow MCP server externally</a>, <a href="#serve-api-requests">serve API requests</a>, and <a href="#share-a-flows-playground">share a flow's <strong>Playground</strong> publicly</a>.</p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="prerequisites">Prerequisites<a href="#prerequisites" class="hash-link" aria-label="Direct link to Prerequisites" title="Direct link to Prerequisites"></a></h2>
|
||
<p>On the machine where you plan to host your Langflow installation, <a href="/get-started-installation">install Langflow</a> and a reverse proxy or forwarding service.</p>
|
||
<p>This guide uses ngrok, but you can use any similar reverse proxy or forwarding platform.</p>
|
||
<p>If you want to follow along with this guide, <a href="https://ngrok.com/docs/getting-started/#1-install-ngrok" target="_blank" rel="noopener noreferrer">install ngrok</a> and <a href="https://dashboard.ngrok.com/get-started/your-authtoken" target="_blank" rel="noopener noreferrer">create an ngrok authtoken</a>.</p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="expose-your-langflow-server-with-ngrok">Expose your Langflow server with ngrok<a href="#expose-your-langflow-server-with-ngrok" class="hash-link" aria-label="Direct link to Expose your Langflow server with ngrok" title="Direct link to Expose your Langflow server with ngrok"></a></h2>
|
||
<ol>
|
||
<li>
|
||
<p>Start Langflow:</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>uv run langflow run</span></div></div><br></code></div></div>
|
||
</li>
|
||
<li>
|
||
<p>In another terminal window, use your ngrok authtoken to authenticate your local ngrok server:</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>ngrok config add-authtoken NGROK_AUTHTOKEN</span></div></div><br></code></div></div>
|
||
</li>
|
||
<li>
|
||
<p>Use ngrok to expose your Langflow server to the public internet:</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>ngrok http http://localhost:7860</span></div></div><br></code></div></div>
|
||
<p>This example assumes that you use the default Langflow listening address at <code>http://localhost:7860</code>. If you have a different listening address, you must modify this command accordingly.</p>
|
||
<p>The ngrok session starts in your terminal and deploys an ephemeral domain with no authentication.
|
||
To add authentication or deploy a static domain, see the <a href="https://ngrok.com/docs/" target="_blank" rel="noopener noreferrer">ngrok documentation</a>.</p>
|
||
<p>The <code>Forwarding</code> line prints the forwarding address for your Langflow server:</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>Forwarding https://94b1-76-64-171-14.ngrok-free.app -> http://localhost:7860</span></div></div><br></code></div></div>
|
||
<p>The forwarding address acts as a reverse proxy for your Langflow server, and ngrok forwards your local traffic to this domain.</p>
|
||
</li>
|
||
<li>
|
||
<p>To verify that your Langflow server is publicly available, navigate to the forwarding address URL, such as <code>https://94b1-76-64-171-14.ngrok-free.app</code>.</p>
|
||
</li>
|
||
</ol>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="use-a-public-langflow-server">Use a public Langflow server<a href="#use-a-public-langflow-server" class="hash-link" aria-label="Direct link to Use a public Langflow server" title="Direct link to Use a public Langflow server"></a></h2>
|
||
<p>When your Langflow server is public, you can do things like <a href="#deploy-your-mcp-server-externally">deploy your Langflow MCP server externally</a>, <a href="#serve-api-requests">serve API requests</a>, and <a href="#share-a-flows-playground">share a flow's <strong>Playground</strong> publicly</a>.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="deploy-your-mcp-server-externally">Deploy your MCP server externally<a href="#deploy-your-mcp-server-externally" class="hash-link" aria-label="Direct link to Deploy your MCP server externally" title="Direct link to Deploy your MCP server externally"></a></h3>
|
||
<p>After you deploy a public Langflow server, you can also access your Langflow projects' MCP servers publicly.</p>
|
||
<p>To do this, use your server's forwarding address when you <a href="/mcp-server#connect-clients-to-use-the-servers-actions">connect a client to a Langflow MCP server</a>.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="serve-api-requests">Serve API requests<a href="#serve-api-requests" class="hash-link" aria-label="Direct link to Serve API requests" title="Direct link to Serve API requests"></a></h3>
|
||
<p>To send requests to a public Langflow server's <a href="/api-reference-api-examples">Langflow API</a> endpoints, use the server's domain as the <a href="/api-reference-api-examples#base-url">base URL</a> for your API requests.
|
||
For example:</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>curl -X POST \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "PUBLIC_SERVER_DOMAIN/api/v1/webhook/FLOW_ID" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> -H "Content-Type: application/json" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> -H "x-api-key: LANGFLOW_API_KEY" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> -d '{"data": "example-data"}'</span></div></div><br></code></div></div>
|
||
<div class="theme-admonition theme-admonition-tip admonition_xJq3 alert alert--success"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 12 16"><path fill-rule="evenodd" d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z"></path></svg></span>tip</div><div class="admonitionContent_BuS1"><p>When you create flows on public Langflow servers, the code snippets generated in the <a href="/concepts-publish"><strong>API access</strong> pane</a> automatically use your public server's domain.</p></div></div>
|
||
<p>You also use your public domain when making Langflow API calls in scripts, including the code snippets that are automatically generated by Langflow.
|
||
For example, the following code snippet calls an ngrok domain to trigger the specified flow (<code>d764c4b8...</code>):</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>import requests</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>url = "https://3f7c-73-64-93-151.ngrok-free.app/api/v1/run/d764c4b8-5cec-4c0f-9de0-4b419b11901a" # The complete API endpoint URL for this flow</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span># Request payload configuration</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>payload = {</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> "output_type": "chat",</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> "input_type": "chat",</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> "input_value": "Hello"</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>}</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span># Request headers</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>headers = {</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> "Content-Type": "application/json",</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> "x-api-key": "LANGFLOW_API_KEY"</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>}</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>try:</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> # Send API request</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> response = requests.request("POST", url, json=payload, headers=headers)</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> response.raise_for_status() # Raise exception for bad status codes</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> # Print response</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> print(response.text)</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>except requests.exceptions.RequestException as e:</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> print(f"Error making API request: {e}")</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span>except ValueError as e:</span></div></div><div><span class="ch-code-line-number">_<!-- -->29</span><div style="display:inline-block;margin-left:16px"><span> print(f"Error parsing response: {e}")</span></div></div><br></code></div></div>
|
||
<p>For a demo of the Langflow API in a script, see the <a href="/get-started-quickstart">Quickstart</a>.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="share-a-flows-playground">Share a flow's Playground<a href="#share-a-flows-playground" class="hash-link" aria-label="Direct link to Share a flow's Playground" title="Direct link to Share a flow's Playground"></a></h3>
|
||
<p>After you deploy a public Langflow server, you can use the <strong>Shareable Playground</strong> option to make a flow's <strong>Playground</strong> available at a public URL.
|
||
If a user accesses this URL, they can interact with the flow's chat input and output and view the results without installing Langflow or generating a Langflow API key.</p>
|
||
<p>For more information, see <a href="/concepts-playground#share-a-flows-playground">Share a flow's Playground</a>.</p></div></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/deployment-overview"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Langflow deployment overview</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/develop-application"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Containerize a Langflow application</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#prerequisites" class="table-of-contents__link toc-highlight">Prerequisites</a></li><li><a href="#expose-your-langflow-server-with-ngrok" class="table-of-contents__link toc-highlight">Expose your Langflow server with ngrok</a></li><li><a href="#use-a-public-langflow-server" class="table-of-contents__link toc-highlight">Use a public Langflow server</a><ul><li><a href="#deploy-your-mcp-server-externally" class="table-of-contents__link toc-highlight">Deploy your MCP server externally</a></li><li><a href="#serve-api-requests" class="table-of-contents__link toc-highlight">Serve API requests</a></li><li><a href="#share-a-flows-playground" class="table-of-contents__link toc-highlight">Share a flow's Playground</a></li></ul></li></ul></div></div></div></div></main></div></div></div><footer class="theme-layout-footer footer"><div class="container container-fluid"><div class="row footer__links"><div class="theme-layout-footer-column col footer__col"><div class="footer__title"></div><ul class="footer__items clean-list"><li class="footer__item"><div class="footer-links">
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