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itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">API</span><meta itemprop="position" content="2"></li></ul></nav><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>API</h1></header><style>[data-ch-theme="github-dark"] { --ch-t-colorScheme: dark;--ch-t-foreground: #c9d1d9;--ch-t-background: #0d1117;--ch-t-lighter-inlineBackground: #0d1117e6;--ch-t-editor-background: #0d1117;--ch-t-editor-foreground: #c9d1d9;--ch-t-editor-lineHighlightBackground: #6e76811a;--ch-t-editor-rangeHighlightBackground: #ffffff0b;--ch-t-editor-infoForeground: #3794FF;--ch-t-editor-selectionBackground: #264F78;--ch-t-focusBorder: #1f6feb;--ch-t-tab-activeBackground: #0d1117;--ch-t-tab-activeForeground: #c9d1d9;--ch-t-tab-inactiveBackground: 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<!-- -->
<p>The <strong>API</strong> section presents code templates for integrating your flow into external applications.</p>
<p><img decoding="async" loading="lazy" src="/assets/images/api-pane-97a01b20a262676d4e21906df0e29f46.png" width="3236" height="1760" class="img_ev3q"></p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="4eb287a8424349c4b0b436a6703de5f3">cURL<a href="#4eb287a8424349c4b0b436a6703de5f3" class="hash-link" aria-label="Direct link to cURL" title="Direct link to cURL"></a></h3>
<p>The <strong>cURL</strong> tab displays sample code for posting a query to your flow. Modify the <code>input_value</code> to change your input message. Copy the code and run it to post a query to your flow and get the result.</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="fb7db14e6330418389562ef647aa2354">Python API<a href="#fb7db14e6330418389562ef647aa2354" class="hash-link" aria-label="Direct link to Python API" title="Direct link to Python API"></a></h3>
<p>The <strong>Python API</strong> tab displays code to interact with your flow using the Python HTTP requests library.</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="7af87438549b4972907ac310a4193067">Python Code<a href="#7af87438549b4972907ac310a4193067" class="hash-link" aria-label="Direct link to Python Code" title="Direct link to Python Code"></a></h3>
<p>The <strong>Python Code</strong> tab displays code to interact with your flow&#x27;s <code>.json</code> file using the Langflow runtime.</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="5680600063724590ac2302b4ddeea867">Tweaks<a href="#5680600063724590ac2302b4ddeea867" class="hash-link" aria-label="Direct link to Tweaks" title="Direct link to Tweaks"></a></h3>
<p>The <strong>Tweaks</strong> tab displays the available parameters for your flow. Modifying the parameters changes the code parameters across all windows. For example, changing the <strong>Chat Input</strong> component&#x27;s <code>input_value</code> will change that value across all API calls.</p>
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="send-image-files-to-your-flow-with-the-api">Send image files to your flow with the API<a href="#send-image-files-to-your-flow-with-the-api" class="hash-link" aria-label="Direct link to Send image files to your flow with the API" title="Direct link to Send image files to your flow with the API"></a></h2>
<p>Send image files to the Langflow API for AI analysis.</p>
<p>The default file limit is 100 MB. To configure this value, change the <code>LANGFLOW_MAX_FILE_SIZE_UPLOAD</code> environment variable.
For more information, see <a href="/environment-variables#supported-variables">Supported environment variables</a>.</p>
<ol>
<li>To send an image to your flow with the API, POST the image file to the <code>v1/files/upload/&lt;YOUR-FLOW-ID&gt;</code> endpoint of your flow.</li>
</ol>
<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 &quot;http://127.0.0.1:7860/api/v1/files/upload/a430cc57-06bb-4c11-be39-d3d4de68d2c4&quot; \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> -H &quot;Content-Type: multipart/form-data&quot; \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> -F &quot;file=@image-file.png&quot;</span></div></div><br></code></div></div>
<p>The API returns the image file path in the format <code>&quot;file_path&quot;:&quot;&lt;YOUR-FLOW-ID&gt;/&lt;TIMESTAMP&gt;_&lt;FILE-NAME&gt;&quot;}</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">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>{&quot;flowId&quot;:&quot;a430cc57-06bb-4c11-be39-d3d4de68d2c4&quot;,&quot;file_path&quot;:&quot;a430cc57-06bb-4c11-be39-d3d4de68d2c4/2024-11-27_14-47-50_image-file.png&quot;}</span></div></div><br></code></div></div>
<ol start="2">
<li>Post the image file to the <strong>Chat Input</strong> component of a <strong>Basic prompting</strong> flow.
Pass the file path value as an input in the <strong>Tweaks</strong> section of the curl call to Langflow.</li>
</ol>
<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">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span>curl -X POST \</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> &quot;http://127.0.0.1:7860/api/v1/run/a430cc57-06bb-4c11-be39-d3d4de68d2c4?stream=false&quot; \</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> -H &#x27;Content-Type: application/json&#x27;\</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> -d &#x27;{</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> &quot;output_type&quot;: &quot;chat&quot;,</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> &quot;input_type&quot;: &quot;chat&quot;,</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> &quot;tweaks&quot;: {</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> &quot;ChatInput-b67sL&quot;: {</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> &quot;files&quot;: &quot;a430cc57-06bb-4c11-be39-d3d4de68d2c4/2024-11-27_14-47-50_image-file.png&quot;,</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> &quot;input_value&quot;: &quot;what do you see?&quot;</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> }</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span>}}&#x27;</span></div></div><br></code></div></div>
<p>Your chatbot describes the image file you sent.</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>&quot;text&quot;: &quot;This flowchart appears to represent a complex system for processing financial inquiries using various AI agents and tools. Heres a breakdown of its components and how they might work together...&quot;</span></div></div><br></code></div></div>
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="48f121a6cb3243979a341753da0c2700">Chat Widget<a href="#48f121a6cb3243979a341753da0c2700" class="hash-link" aria-label="Direct link to Chat Widget" title="Direct link to Chat Widget"></a></h2>
<hr>
<p>The <strong>Chat Widget HTML</strong> tab displays code that can be inserted in the <code>&lt;body&gt;</code> of your HTML to interact with your flow.</p>
<p>The <strong>Langflow Chat Widget</strong> is a powerful web component that enables communication with a Langflow project. This widget allows for a chat interface embedding, allowing the integration of Langflow into web applications effortlessly.</p>
<p>You can get the HTML code embedded with the chat by clicking the Code button at the Sidebar after building a flow.</p>
<p>Clicking the Chat Widget HTML tab, you&#x27;ll get the code to be inserted. Read below to learn how to use it with HTML, React and Angular.</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="6e84db2f2a0d451db6fa03c57e9bf9a4">Embed your flow into HTML<a href="#6e84db2f2a0d451db6fa03c57e9bf9a4" class="hash-link" aria-label="Direct link to Embed your flow into HTML" title="Direct link to Embed your flow into HTML"></a></h3>
<p>The Chat Widget can be embedded into any HTML page, inside a <code>&lt;body&gt;</code> tag, as demonstrated in the video below.</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="fe5d3b1c42e74e4c84ebc9d1799b7665">Embed your flow with React<a href="#fe5d3b1c42e74e4c84ebc9d1799b7665" class="hash-link" aria-label="Direct link to Embed your flow with React" title="Direct link to Embed your flow with React"></a></h3>
<p>To embed the Chat Widget using React, insert this <code>&lt;script&gt;</code> tag into the React <em>index.html</em> file, inside the <code>&lt;body&gt;</code>tag:</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>&lt;script src=&quot;https://cdn.jsdelivr.net/gh/langflow-ai/langflow-embedded-chat@main/dist/build/static/js/bundle.min.js&quot;&gt;&lt;/script&gt;</span></div></div><br></code></div></div>
<p>Declare your Web Component and encapsulate it in a React component.</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>declare global { namespace JSX { interface IntrinsicElements { &quot;langflow-chat&quot;: any; } }}export default function ChatWidget({ className }) { return ( &lt;div className={className}&gt; &lt;langflow-chat chat_inputs=&#x27;{&quot;your_key&quot;:&quot;value&quot;}&#x27; chat_input_field=&quot;your_chat_key&quot; flow_id=&quot;your_flow_id&quot; host_url=&quot;langflow_url&quot; &gt;&lt;/langflow-chat&gt; &lt;/div&gt; );}</span></div></div><br></code></div></div>
<p>Finally, you can place the component anywhere in your code to display the Chat Widget.</p>
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="4fd87355b9aa409894acfbb9e1497980">Embed your flow with Angular<a href="#4fd87355b9aa409894acfbb9e1497980" class="hash-link" aria-label="Direct link to Embed your flow with Angular" title="Direct link to Embed your flow with Angular"></a></h3>
<p>To use the chat widget in Angular, first add this <code>&lt;script&gt;</code> tag into the Angular <em>index.html</em> file, inside the <code>&lt;body&gt;</code> tag.</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>&lt;script src=&quot;https://cdn.jsdelivr.net/gh/langflow-ai/langflow-embedded-chat@main/dist/build/static/js/bundle.min.js&quot;&gt;&lt;/script&gt;</span></div></div><br></code></div></div>
<p>When you use a custom web component in an Angular template, the Angular compiler might show a warning when it doesn&#x27;t recognize the custom elements by default. To suppress this warning, add <code>CUSTOM_ELEMENTS_SCHEMA</code> to the module&#x27;s <code>@NgModule.schemas</code>.</p>
<ul>
<li>Open the module file (it typically ends with <em>.module.ts</em>) where you&#x27;d add the <code>langflow-chat</code> web component.</li>
<li>Import <code>CUSTOM_ELEMENTS_SCHEMA</code> at the top of the file:</li>
</ul>
<p><code>import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from &quot;@angular/core&quot;;</code></p>
<ul>
<li>Add <code>CUSTOM_ELEMENTS_SCHEMA</code> to the &#x27;schemas&#x27; array inside the &#x27;@NgModule&#x27; decorator:</li>
</ul>
<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>@NgModule({ declarations: [ // ... Other components and directives ... ], imports: [ // ... Other imported modules ... ], schemas: [CUSTOM_ELEMENTS_SCHEMA], // Add the CUSTOM_ELEMENTS_SCHEMA here})export class YourModule {}</span></div></div><br></code></div></div>
<p>In your Angular project, find the component belonging to the module where <code>CUSTOM_ELEMENTS_SCHEMA</code> was added. Inside the template, add the <code>langflow-chat</code> tag to include the Chat Widget in your component&#x27;s view:</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>&lt;langflow-chat chat_inputs=&#x27;{&quot;your_key&quot;:&quot;value&quot;}&#x27; chat_input_field=&quot;your_chat_key&quot; flow_id=&quot;your_flow_id&quot; host_url=&quot;langflow_url&quot;&gt;&lt;/langflow-chat&gt;</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><code>CUSTOM_ELEMENTS_SCHEMA</code> is a built-in schema that allows Angular to recognize custom elements. Adding <code>CUSTOM_ELEMENTS_SCHEMA</code> tells Angular to allow custom elements in your templates, and it will suppress the warning related to unknown elements like <code>langflow-chat</code>. Notice that you can only use the Chat Widget in components that are part of the module where you added <code>CUSTOM_ELEMENTS_SCHEMA</code>.</p></div></div>
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="5ede4bbbd2ac43e29c90f3edb43cba58">Chat Widget Configuration<a href="#5ede4bbbd2ac43e29c90f3edb43cba58" class="hash-link" aria-label="Direct link to Chat Widget Configuration" title="Direct link to Chat Widget Configuration"></a></h2>
<hr>
<p>Use the widget API to customize your Chat Widget:</p>
<div class="theme-admonition theme-admonition-caution admonition_xJq3 alert alert--warning"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 16 16"><path fill-rule="evenodd" d="M8.893 1.5c-.183-.31-.52-.5-.887-.5s-.703.19-.886.5L.138 13.499a.98.98 0 0 0 0 1.001c.193.31.53.501.886.501h13.964c.367 0 .704-.19.877-.5a1.03 1.03 0 0 0 .01-1.002L8.893 1.5zm.133 11.497H6.987v-2.003h2.039v2.003zm0-3.004H6.987V5.987h2.039v4.006z"></path></svg></span>caution</div><div class="admonitionContent_BuS1"><p>Props with the type JSON need to be passed as stringified JSONs, with the format {&quot;key&quot;:&quot;value&quot;}.</p></div></div>
<table><thead><tr><th>Prop</th><th>Type</th><th>Required</th><th>Description</th></tr></thead><tbody><tr><td>bot_message_style</td><td>JSON</td><td>No</td><td>Applies custom formatting to bot messages.</td></tr><tr><td>chat_input_field</td><td>String</td><td>Yes</td><td>Defines the type of the input field for chat messages.</td></tr><tr><td>chat_inputs</td><td>JSON</td><td>Yes</td><td>Determines the chat input elements and their respective values.</td></tr><tr><td>chat_output_key</td><td>String</td><td>No</td><td>Specifies which output to display if multiple outputs are available.</td></tr><tr><td>chat_position</td><td>String</td><td>No</td><td>Positions the chat window on the screen (options include: top-left, top-center, top-right, center-left, center-right, bottom-right, bottom-center, bottom-left).</td></tr><tr><td>chat_trigger_style</td><td>JSON</td><td>No</td><td>Styles the chat trigger button.</td></tr><tr><td>chat_window_style</td><td>JSON</td><td>No</td><td>Customizes the overall appearance of the chat window.</td></tr><tr><td>error_message_style</td><td>JSON</td><td>No</td><td>Sets the format for error messages within the chat window.</td></tr><tr><td>flow_id</td><td>String</td><td>Yes</td><td>Identifies the flow that the component is associated with.</td></tr><tr><td>height</td><td>Number</td><td>No</td><td>Sets the height of the chat window in pixels.</td></tr><tr><td>host_url</td><td>String</td><td>Yes</td><td>Specifies the URL of the host for chat component communication.</td></tr><tr><td>input_container_style</td><td>JSON</td><td>No</td><td>Applies styling to the container where chat messages are entered.</td></tr><tr><td>input_style</td><td>JSON</td><td>No</td><td>Sets the style for the chat input field.</td></tr><tr><td>online</td><td>Boolean</td><td>No</td><td>Toggles the online status of the chat component.</td></tr><tr><td>online_message</td><td>String</td><td>No</td><td>Sets a custom message to display when the chat component is online.</td></tr><tr><td>placeholder</td><td>String</td><td>No</td><td>Sets the placeholder text for the chat input field.</td></tr><tr><td>placeholder_sending</td><td>String</td><td>No</td><td>Sets the placeholder text to display while a message is being sent.</td></tr><tr><td>send_button_style</td><td>JSON</td><td>No</td><td>Sets the style for the send button in the chat window.</td></tr><tr><td>send_icon_style</td><td>JSON</td><td>No</td><td>Sets the style for the send icon in the chat window.</td></tr><tr><td>tweaks</td><td>JSON</td><td>No</td><td>Applies additional custom adjustments for the associated flow.</td></tr><tr><td>user_message_style</td><td>JSON</td><td>No</td><td>Determines the formatting for user messages in the chat window.</td></tr><tr><td>width</td><td>Number</td><td>No</td><td>Sets the width of the chat window in pixels.</td></tr><tr><td>window_title</td><td>String</td><td>No</td><td>Sets the title displayed in the chat window&#x27;s header or title bar.</td></tr></tbody></table></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/workspace-overview"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Workspace concepts</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/workspace-logs"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Logs</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="#4eb287a8424349c4b0b436a6703de5f3" class="table-of-contents__link toc-highlight">cURL</a></li><li><a href="#fb7db14e6330418389562ef647aa2354" class="table-of-contents__link toc-highlight">Python API</a></li><li><a href="#7af87438549b4972907ac310a4193067" class="table-of-contents__link toc-highlight">Python Code</a></li><li><a href="#5680600063724590ac2302b4ddeea867" class="table-of-contents__link toc-highlight">Tweaks</a></li><li><a href="#send-image-files-to-your-flow-with-the-api" class="table-of-contents__link toc-highlight">Send image files to your flow with the API</a></li><li><a href="#48f121a6cb3243979a341753da0c2700" class="table-of-contents__link toc-highlight">Chat Widget</a><ul><li><a href="#6e84db2f2a0d451db6fa03c57e9bf9a4" class="table-of-contents__link toc-highlight">Embed your flow into HTML</a></li><li><a href="#fe5d3b1c42e74e4c84ebc9d1799b7665" class="table-of-contents__link toc-highlight">Embed your flow with React</a></li><li><a href="#4fd87355b9aa409894acfbb9e1497980" class="table-of-contents__link toc-highlight">Embed your flow with Angular</a></li></ul></li><li><a href="#5ede4bbbd2ac43e29c90f3edb43cba58" class="table-of-contents__link toc-highlight">Chat Widget Configuration</a></li></ul></div></div></div></div></main></div></div></div><div id="ms-floating-button" 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