mirror of
https://github.com/langflow-ai/langflow.git
synced 2026-07-24 05:39:16 +08:00
121 lines
44 KiB
HTML
121 lines
44 KiB
HTML
<!doctype html>
|
||
<html lang="en" dir="ltr" class="docs-wrapper plugin-docs plugin-id-default docs-version-current docs-doc-page docs-doc-id-API-Reference/api-reference-api-examples" data-has-hydrated="false">
|
||
<head>
|
||
<meta charset="UTF-8">
|
||
<meta name="generator" content="Docusaurus v3.8.1">
|
||
<title data-rh="true">Get started with the Langflow API | Langflow Documentation</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://docs.langflow.org/api-reference-api-examples"><meta data-rh="true" property="og:locale" content="en"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Get started with the Langflow API | Langflow Documentation"><meta data-rh="true" name="description" content="You can use the Langflow API for programmatic interactions with Langflow, such as the following:"><meta data-rh="true" property="og:description" content="You can use the Langflow API for programmatic interactions with Langflow, such as the following:"><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://docs.langflow.org/api-reference-api-examples"><link data-rh="true" rel="alternate" href="https://docs.langflow.org/api-reference-api-examples" hreflang="en"><link data-rh="true" rel="alternate" href="https://docs.langflow.org/api-reference-api-examples" hreflang="x-default"><link data-rh="true" rel="preconnect" href="https://UZK6BDPCVY-dsn.algolia.net" crossorigin="anonymous"><script data-rh="true" type="application/ld+json">{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Get started with the Langflow API","item":"https://docs.langflow.org/api-reference-api-examples"}]}</script><link rel="preconnect" href="https://www.google-analytics.com">
|
||
<link rel="preconnect" href="https://www.googletagmanager.com">
|
||
<script async src="https://www.googletagmanager.com/gtag/js?id=G-SLQFLQ3KPT"></script>
|
||
<script>function gtag(){dataLayer.push(arguments)}window.dataLayer=window.dataLayer||[],gtag("js",new Date),gtag("config","G-SLQFLQ3KPT",{})</script>
|
||
|
||
|
||
|
||
|
||
|
||
<link rel="search" type="application/opensearchdescription+xml" title="Langflow Documentation" href="/opensearch.xml">
|
||
|
||
|
||
|
||
<script>!function(){var e="analytics",t=window[e]=window[e]||[];if(!t.initialize)if(t.invoked)window.console&&console.error&&console.error("Segment snippet included twice.");else{t.invoked=!0,t.methods=["trackSubmit","trackClick","trackLink","trackForm","pageview","identify","reset","group","track","ready","alias","debug","page","screen","once","off","on","addSourceMiddleware","addIntegrationMiddleware","setAnonymousId","addDestinationMiddleware","register"],t.factory=function(n){return function(){if(window[e].initialized)return window[e][n].apply(window[e],arguments);var r=Array.prototype.slice.call(arguments);if(["track","screen","alias","group","page","identify"].indexOf(n)>-1){var i=document.querySelector("link[rel='canonical']");r.push({__t:"bpc",c:i&&i.getAttribute("href")||void 0,p:location.pathname,u:location.href,s:location.search,t:document.title,r:document.referrer})}return r.unshift(n),t.push(r),t}};for(var n=0;n<t.methods.length;n++){var r=t.methods[n];t[r]=t.factory(r)}t.load=function(n,r){var i=document.createElement("script");i.type="text/javascript",i.async=!0,i.setAttribute("data-global-segment-analytics-key",e),i.src="https://cdn.segment.com/analytics.js/v1/"+n+"/analytics.min.js";var a=document.getElementsByTagName("script")[0];a.parentNode.insertBefore(i,a),t._loadOptions=r},t._writeKey="60AfGDrVxy8nAGJngo3fCYWG4LvhMAlG",t.SNIPPET_VERSION="5.2.0",t.load("60AfGDrVxy8nAGJngo3fCYWG4LvhMAlG"),t.page()}}()</script>
|
||
<script>window.__SCROLL_TRACKING_CONFIG__={selectors:[{selector:"h1, h2, h3, h4, h5, h6",eventName:"Docs.langflow.org - Heading Viewed",properties:{element_type:"heading"}},{selector:".ch-codeblock",eventName:"Docs.langflow.org - Codeblock Viewed",properties:{element_type:"code",language:"helper:codeLanguage"}}]}</script>
|
||
|
||
|
||
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Sora:wght@550;600&display=swap">
|
||
<script>!function(){window.semaphore=window.semaphore||[],window.ketch=function(){window.semaphore.push(arguments)};var e=document.createElement("script");e.type="text/javascript",e.src="https://global.ketchcdn.com/web/v3/config/datastax/langflow_org_web/boot.js",e.defer=e.async=!0,document.getElementsByTagName("head")[0].appendChild(e)}()</script>
|
||
<script defer="true">!function(){const e=e=>{if(window.gtag&&e.purposes&&"analytics"in e.purposes&&"targeted_advertising"in e.purposes){const n=!0===e.purposes.analytics?"granted":"denied",t=!0===e.purposes.targeted_advertising?"granted":"denied",a={analytics_storage:n,ad_personalization:t,ad_storage:t,ad_user_data:t};window.gtag("consent","update",a)}};window.ketch&&window.ketch("on","consent",e)}()</script><link rel="stylesheet" href="/assets/css/styles.e756ed1e.css">
|
||
<script src="/assets/js/runtime~main.c27ec185.js" defer="defer"></script>
|
||
<script src="/assets/js/main.9e5db23c.js" defer="defer"></script>
|
||
</head>
|
||
<body class="navigation-with-keyboard">
|
||
<svg xmlns="http://www.w3.org/2000/svg" style="display: none;"><defs>
|
||
<symbol id="theme-svg-external-link" viewBox="0 0 24 24"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"/></symbol>
|
||
</defs></svg>
|
||
<script>!function(){var t=function(){try{return new URLSearchParams(window.location.search).get("docusaurus-theme")}catch(t){}}()||function(){try{return window.localStorage.getItem("theme")}catch(t){}}();document.documentElement.setAttribute("data-theme",t||(window.matchMedia("(prefers-color-scheme: dark)").matches?"dark":"light")),document.documentElement.setAttribute("data-theme-choice",t||"system")}(),function(){try{const c=new URLSearchParams(window.location.search).entries();for(var[t,e]of c)if(t.startsWith("docusaurus-data-")){var a=t.replace("docusaurus-data-","data-");document.documentElement.setAttribute(a,e)}}catch(t){}}()</script><div id="__docusaurus"><div role="region" aria-label="Skip to main content"><a class="skipToContent_fXgn" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><nav aria-label="Main" class="theme-layout-navbar navbar navbar--fixed-top navbarHideable_m1mJ"><div class="navbar__inner"><div class="theme-layout-navbar-left navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a class="navbar__brand" href="/"><div class="navbar__logo"><img src="/img/lf-docs-light.svg" alt="Langflow" class="themedComponent_mlkZ themedComponent--light_NVdE"><img src="/img/lf-docs-dark.svg" alt="Langflow" class="themedComponent_mlkZ themedComponent--dark_xIcU"></div></a></div><div class="theme-layout-navbar-right navbar__items navbar__items--right"><a href="https://github.com/langflow-ai/langflow" target="_blank" class="navbar__item navbar__link header-github-link" data-event="Docs.langflow.org - Social Clicked" data-platform="github"></a><a href="https://twitter.com/langflow_ai" target="_blank" class="navbar__item navbar__link header-twitter-link" data-event="Docs.langflow.org - Social Clicked" data-platform="x"></a><a href="https://discord.gg/EqksyE2EX9" target="_blank" class="navbar__item navbar__link header-discord-link" data-event="Docs.langflow.org - Social Clicked" data-platform="discord"></a><div class="toggle_vylO colorModeToggle_DEke"><button class="clean-btn toggleButton_gllP toggleButtonDisabled_aARS" type="button" disabled="" title="system mode" aria-label="Switch between dark and light mode (currently system mode)"><svg viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" class="toggleIcon_g3eP lightToggleIcon_pyhR"><path fill="currentColor" d="M12,9c1.65,0,3,1.35,3,3s-1.35,3-3,3s-3-1.35-3-3S10.35,9,12,9 M12,7c-2.76,0-5,2.24-5,5s2.24,5,5,5s5-2.24,5-5 S14.76,7,12,7L12,7z M2,13l2,0c0.55,0,1-0.45,1-1s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S1.45,13,2,13z M20,13l2,0c0.55,0,1-0.45,1-1 s-0.45-1-1-1l-2,0c-0.55,0-1,0.45-1,1S19.45,13,20,13z M11,2v2c0,0.55,0.45,1,1,1s1-0.45,1-1V2c0-0.55-0.45-1-1-1S11,1.45,11,2z M11,20v2c0,0.55,0.45,1,1,1s1-0.45,1-1v-2c0-0.55-0.45-1-1-1C11.45,19,11,19.45,11,20z M5.99,4.58c-0.39-0.39-1.03-0.39-1.41,0 c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0s0.39-1.03,0-1.41L5.99,4.58z M18.36,16.95 c-0.39-0.39-1.03-0.39-1.41,0c-0.39,0.39-0.39,1.03,0,1.41l1.06,1.06c0.39,0.39,1.03,0.39,1.41,0c0.39-0.39,0.39-1.03,0-1.41 L18.36,16.95z M19.42,5.99c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06c-0.39,0.39-0.39,1.03,0,1.41 s1.03,0.39,1.41,0L19.42,5.99z M7.05,18.36c0.39-0.39,0.39-1.03,0-1.41c-0.39-0.39-1.03-0.39-1.41,0l-1.06,1.06 c-0.39,0.39-0.39,1.03,0,1.41s1.03,0.39,1.41,0L7.05,18.36z"></path></svg><svg viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" class="toggleIcon_g3eP darkToggleIcon_wfgR"><path fill="currentColor" d="M9.37,5.51C9.19,6.15,9.1,6.82,9.1,7.5c0,4.08,3.32,7.4,7.4,7.4c0.68,0,1.35-0.09,1.99-0.27C17.45,17.19,14.93,19,12,19 c-3.86,0-7-3.14-7-7C5,9.07,6.81,6.55,9.37,5.51z M12,3c-4.97,0-9,4.03-9,9s4.03,9,9,9s9-4.03,9-9c0-0.46-0.04-0.92-0.1-1.36 c-0.98,1.37-2.58,2.26-4.4,2.26c-2.98,0-5.4-2.42-5.4-5.4c0-1.81,0.89-3.42,2.26-4.4C12.92,3.04,12.46,3,12,3L12,3z"></path></svg><svg viewBox="0 0 24 24" width="24" height="24" aria-hidden="true" class="toggleIcon_g3eP systemToggleIcon_QzmC"><path fill="currentColor" d="m12 21c4.971 0 9-4.029 9-9s-4.029-9-9-9-9 4.029-9 9 4.029 9 9 9zm4.95-13.95c1.313 1.313 2.05 3.093 2.05 4.95s-0.738 3.637-2.05 4.95c-1.313 1.313-3.093 2.05-4.95 2.05v-14c1.857 0 3.637 0.737 4.95 2.05z"></path></svg></button></div><div class="navbarSearchContainer_Bca1"><button type="button" class="DocSearch DocSearch-Button" aria-label="Search (Command+K)"><span class="DocSearch-Button-Container"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20" aria-hidden="true"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span></span><span class="DocSearch-Button-Keys"></span></button></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="theme-layout-main main-wrapper mainWrapper_z2l0"><div class="docsWrapper_hBAB"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docRoot_UBD9"><aside class="theme-doc-sidebar-container docSidebarContainer_YfHR"><div class="sidebarViewport_aRkj"><div class="sidebar_njMd sidebarWithHideableNavbar_wUlq"><a tabindex="-1" class="sidebarLogo_isFc" href="/"><img src="/img/lf-docs-light.svg" alt="Langflow" class="themedComponent_mlkZ themedComponent--light_NVdE"><img src="/img/lf-docs-dark.svg" alt="Langflow" class="themedComponent_mlkZ themedComponent--dark_xIcU"></a><nav aria-label="Docs sidebar" class="menu thin-scrollbar menu_SIkG"><ul class="theme-doc-sidebar-menu menu__list"><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="/">Welcome to Langflow</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/about-langflow">Get started</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/concepts-overview">Flows</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/agents">Agents</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/mcp-client">Model Context Protocol (MCP)</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/api-keys-and-authentication">Develop</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/deployment-overview">Deploy</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/concepts-components">Components reference</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret menu__link--active" role="button" aria-expanded="true" href="/api-reference-api-examples">API reference</a></div><ul class="menu__list"><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link menu__link--active" aria-current="page" tabindex="0" href="/api-reference-api-examples">Get started with the Langflow API</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/typescript-client">Use the TypeScript client</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api-flows-run">Flow trigger endpoints</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api-flows">Flow management endpoints</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api-files">Files endpoints</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api-projects">Projects endpoints</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api-logs">Logs endpoints</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api-monitor">Monitor endpoints</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api-build">Build endpoints</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api-users">Users endpoints</a></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-2 menu__list-item"><a class="menu__link" tabindex="0" href="/api">Langflow API specification</a></li></ul></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/contributing-community">Contribute</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/release-notes">Release notes</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" role="button" aria-expanded="false" href="/troubleshoot">Support</a></div></li><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 sidebar-ad">
|
||
<a href="https://www.langflow.org/desktop" target="_blank" class="menu__link">
|
||
<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
|
||
<g clip-path="url(#clip0_1645_37)">
|
||
<path d="M12 17H20C21.1046 17 22 16.1046 22 15V13M12 17H4C2.89543 17 2 16.1046 2 15V5C2 3.89543 2.89543 3 4 3H10M12 17V21M8 21H12M12 21H16M11.75 10.2917H13.2083L16.125 7.375H17.5833L20.5 4.45833H21.9583M16.125 11.75H17.5833L20.5 8.83333H21.9583M11.75 5.91667H13.2083L16.125 3H17.5833" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
|
||
</g>
|
||
<defs>
|
||
<clipPath id="clip0_1645_37">
|
||
<rect width="24" height="24" fill="white"/>
|
||
</clipPath>
|
||
</defs>
|
||
</svg>
|
||
<div class="sidebar-ad-text-container">
|
||
<span class="sidebar-ad-text">Get started in minutes</span>
|
||
<span class="sidebar-ad-text sidebar-ad-text-gradient">Download Langflow Desktop</span>
|
||
</div>
|
||
</a>
|
||
</li></ul></nav></div></div></aside><main class="docMainContainer_TBSr"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">API reference</span></li><li class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link">Get started with the Langflow API</span></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>Get started with the Langflow 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: #010409;--ch-t-tab-inactiveForeground: #8b949e;--ch-t-tab-border: #30363d;--ch-t-tab-activeBorder: #0d1117;--ch-t-editorGroup-border: #30363d;--ch-t-editorGroupHeader-tabsBackground: #010409;--ch-t-editorLineNumber-foreground: #6e7681;--ch-t-input-background: #0d1117;--ch-t-input-foreground: #c9d1d9;--ch-t-input-border: #30363d;--ch-t-icon-foreground: #8b949e;--ch-t-sideBar-background: #010409;--ch-t-sideBar-foreground: #c9d1d9;--ch-t-sideBar-border: #30363d;--ch-t-list-activeSelectionBackground: #6e768166;--ch-t-list-activeSelectionForeground: #c9d1d9;--ch-t-list-hoverBackground: #6e76811a;--ch-t-list-hoverForeground: #c9d1d9; }</style>
|
||
<!-- -->
|
||
<p>You can use the Langflow API for programmatic interactions with Langflow, such as the following:</p>
|
||
<ul>
|
||
<li>Create and edit flows, including file management for flows.</li>
|
||
<li>Develop applications that use your flows.</li>
|
||
<li>Develop custom components.</li>
|
||
<li>Build Langflow as a dependency of a larger project.</li>
|
||
<li>Contribute to the overall Langflow project.</li>
|
||
</ul>
|
||
<p>To view and test all available endpoints, you can access the Langflow API's OpenAPI specification at your Langflow deployment's <code>/docs</code> endpoint, such as <code>http://localhost:7860/docs</code>.</p>
|
||
<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>Try it</div><div class="admonitionContent_BuS1"><p>For an example of the Langflow API in a script, see the <a href="/get-started-quickstart">Langflow quickstart</a>.</p><p>The quickstart demonstrates how to get automatically generated code snippets for your flows, use a script to run a flow, and extract data from the Langfow API response.</p></div></div>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="form-langflow-api-requests">Form Langflow API requests<a href="#form-langflow-api-requests" class="hash-link" aria-label="Direct link to Form Langflow API requests" title="Direct link to Form Langflow API requests"></a></h2>
|
||
<p>While individual options vary by endpoint, all Langflow API requests share some commonalities, like a URL, method, parameters, and authentication.</p>
|
||
<p>As an example of a Langflow API request, the following curl command calls the <code>/v1/run</code> endpoint, and it passes a runtime override (<code>tweaks</code>) to the flow's Chat Output 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">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span>curl --request POST \</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> --url "$LANGFLOW_SERVER_URL/api/v1/run/$FLOW_ID?stream=false" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> --header "Content-Type: application/json" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> --header "x-api-key: $LANGFLOW_API_KEY" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> --data '{</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> "input_value": "hello world!",</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> "output_type": "chat",</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> "input_type": "chat",</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> "tweaks": {</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> "ChatOutput-6zcZt": {</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> "should_store_message": true</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> }</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span> }</span></div></div><div><span class="ch-code-line-number">_<!-- -->14</span><div style="display:inline-block;margin-left:16px"><span>}'</span></div></div><br></code></div></div>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="base-url">Base URL<a href="#base-url" class="hash-link" aria-label="Direct link to Base URL" title="Direct link to Base URL"></a></h3>
|
||
<p>By default, local deployments serve the Langflow API at <code>http://localhost:7860/api</code>.</p>
|
||
<p>Remotely hosted Langflow deployments are available at the domain set by the hosting service, such as <code>http://IP_OR_DNS/api</code> or <code>http://IP_OR_DNS:LANGFLOW_PORT/api</code>.</p>
|
||
<p>You can configure the Langflow port number in the <code>LANGFLOW_PORT</code> <a href="/environment-variables">environment variable</a>.</p>
|
||
<ul>
|
||
<li><code>https://UUID.ngrok.app/api</code></li>
|
||
<li><code>http://IP_OR_DNS/api</code></li>
|
||
<li><code>http://IP_OR_DNS:LANGFLOW_PORT/api</code></li>
|
||
</ul>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="authentication">Authentication<a href="#authentication" class="hash-link" aria-label="Direct link to Authentication" title="Direct link to Authentication"></a></h3>
|
||
<p>In Langflow versions 1.5 and later, most API endpoints require authentication with a Langflow API key in either an <code>x-api-key</code> header or query parameter.
|
||
For more information, see <a href="/api-keys-and-authentication">API keys and authentication</a>.</p>
|
||
<p>As with any API, follow industry best practices for storing and referencing sensitive credentials.
|
||
For example, you can <a href="#set-environment-variables">set environment variables</a> for your API keys, and then reference those environment variables in your API requests.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="methods-paths-and-parameters">Methods, paths, and parameters<a href="#methods-paths-and-parameters" class="hash-link" aria-label="Direct link to Methods, paths, and parameters" title="Direct link to Methods, paths, and parameters"></a></h3>
|
||
<p>Langflow API requests use various methods, paths, path parameters, query parameters, and body parameters.
|
||
The specific requirements and options depend on the endpoint that you want to call.</p>
|
||
<p>For example, to create a flow, you pass a JSON-formatted flow definition to <code>POST /v1/flows</code>.
|
||
Then, to run your flow, you call <code>POST /v1/run/$FLOW_ID</code> with optional run parameters in the request body.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="api-versions">API versions<a href="#api-versions" class="hash-link" aria-label="Direct link to API versions" title="Direct link to API versions"></a></h3>
|
||
<p>The Langflow API serves <code>/v1</code> and <code>/v2</code> endpoints.</p>
|
||
<p>Some endpoints only exist under a single version and some exist under both the <code>/v1</code> and <code>/v2</code> versions.</p>
|
||
<p>If a request fails or has an unexpected result, make sure your endpoint path has the correct version.</p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="set-environment-variables">Set environment variables<a href="#set-environment-variables" class="hash-link" aria-label="Direct link to Set environment variables" title="Direct link to Set environment variables"></a></h2>
|
||
<p>You can store commonly used values in environment variables to facilitate reuse, simplify token rotation, and securely reference sensitive values.</p>
|
||
<p>You can use any method you prefer to set environment variables, such as <code>export</code>, <code>.env</code>, <code>zshrc</code>, or <code>.curlrc</code>.
|
||
Then, reference those environment variables in 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">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span># Set environment variables</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span>export LANGFLOW_API_KEY="sk..."</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span>export LANGFLOW_SERVER_URL="https://localhost:7860"</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span>export FLOW_ID="359cd752-07ea-46f2-9d3b-a4407ef618da"</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span>export PROJECT_ID="1415de42-8f01-4f36-bf34-539f23e47466"</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span>export LANGFLOW_API_KEY="sk-..."</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span></span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span># Use environment variables in API requests</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span>curl --request POST \</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> --url "$LANGFLOW_SERVER_URL/api/v1/run/$FLOW_ID$?stream=false" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> --header "Content-Type: application/json" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> --header "x-api-key: $LANGFLOW_API_KEY" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> --data '{</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> "input_value": "hello world!",</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> "output_type": "chat",</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> "input_type": "chat",</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> "tweaks": {</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> "ChatOutput-6zcZt": {</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> "should_store_message": true</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> }</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span> }</span></div></div><div><span class="ch-code-line-number">_<!-- -->22</span><div style="display:inline-block;margin-left:16px"><span>}'</span></div></div><br></code></div></div>
|
||
<p>Commonly used values in Langflow API requests include your <a href="#base-url">Langflow server URL</a>, <a href="#authentication">Langflow API keys</a>, flow IDs, and <a href="/api-projects#read-projects">project IDs</a>.</p>
|
||
<p>You can retrieve flow IDs from the <a href="/concepts-publish#api-access"><strong>API access</strong> pane</a>, in a flow's URL, and with <a href="/api-flows#read-flows"><code>GET /flows</code></a>.</p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="try-some-langflow-api-requests">Try some Langflow API requests<a href="#try-some-langflow-api-requests" class="hash-link" aria-label="Direct link to Try some Langflow API requests" title="Direct link to Try some Langflow API requests"></a></h2>
|
||
<p>Once you have your Langflow server URL, try calling these endpoints that return Langflow metadata.</p>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="get-version">Get version<a href="#get-version" class="hash-link" aria-label="Direct link to Get version" title="Direct link to Get version"></a></h3>
|
||
<p>Returns the current Langflow API version:</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 GET \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "$LANGFLOW_SERVER_URL/api/v1/version" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> -H "accept: 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: $LANGFLOW_API_KEY"</span></div></div><br></code></div></div>
|
||
<details class="details_lb9f alert alert--info details_b_Ee" data-collapsed="true"><summary>Result</summary><div><div class="collapsibleContent_i85q"><div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>{</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "version": "1.1.1",</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "main_version": "1.1.1",</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "package": "Langflow"</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>}</span></div></div><br></code></div></div></div></div></details>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="get-configuration">Get configuration<a href="#get-configuration" class="hash-link" aria-label="Direct link to Get configuration" title="Direct link to Get configuration"></a></h3>
|
||
<p>Returns configuration details for your Langflow deployment:</p>
|
||
<div class="ch-codeblock not-prose" data-ch-theme="github-dark"><div class="ch-code-wrapper ch-code" data-ch-measured="false"><code class="ch-code-scroll-parent"><br><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>curl -X GET \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "$LANGFLOW_SERVER_URL/api/v1/config" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> -H "accept: 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><br></code></div></div>
|
||
<details class="details_lb9f alert alert--info details_b_Ee" data-collapsed="true"><summary>Result</summary><div><div class="collapsibleContent_i85q"><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>{</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "feature_flags": {</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "mvp_components": false</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> },</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "frontend_timeout": 0,</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "auto_saving": true,</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "auto_saving_interval": 1000,</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "health_check_max_retries": 5,</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "max_file_size_upload": 100</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>}</span></div></div><br></code></div></div></div></div></details>
|
||
<h3 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="get-all-components">Get all components<a href="#get-all-components" class="hash-link" aria-label="Direct link to Get all components" title="Direct link to Get all components"></a></h3>
|
||
<p>Returns a dictionary of all Langflow components:</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 GET \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> "$LANGFLOW_SERVER_URL/api/v1/all" \</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span> -H "accept: 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><br></code></div></div>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="next-steps">Next steps<a href="#next-steps" class="hash-link" aria-label="Direct link to Next steps" title="Direct link to Next steps"></a></h2>
|
||
<ul>
|
||
<li>Use the Langflow API to <a href="/api-flows-run">run a flow</a>.</li>
|
||
<li>Use the Langflow API to <a href="/api-files">upload files</a>.</li>
|
||
<li>Use the Langflow API to <a href="/api-logs">get flow logs</a>.</li>
|
||
<li>Explore all endpoints in the <a href="/api">Langflow API specification</a>.</li>
|
||
</ul></div></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/components-custom-components"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Create custom Python components</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/typescript-client"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Use the TypeScript client</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="#form-langflow-api-requests" class="table-of-contents__link toc-highlight">Form Langflow API requests</a><ul><li><a href="#base-url" class="table-of-contents__link toc-highlight">Base URL</a></li><li><a href="#authentication" class="table-of-contents__link toc-highlight">Authentication</a></li><li><a href="#methods-paths-and-parameters" class="table-of-contents__link toc-highlight">Methods, paths, and parameters</a></li><li><a href="#api-versions" class="table-of-contents__link toc-highlight">API versions</a></li></ul></li><li><a href="#set-environment-variables" class="table-of-contents__link toc-highlight">Set environment variables</a></li><li><a href="#try-some-langflow-api-requests" class="table-of-contents__link toc-highlight">Try some Langflow API requests</a><ul><li><a href="#get-version" class="table-of-contents__link toc-highlight">Get version</a></li><li><a href="#get-configuration" class="table-of-contents__link toc-highlight">Get configuration</a></li><li><a href="#get-all-components" class="table-of-contents__link toc-highlight">Get all components</a></li></ul></li><li><a href="#next-steps" class="table-of-contents__link toc-highlight">Next steps</a></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">
|
||
<span>© 2025 Langflow</span>
|
||
<span id="preferenceCenterContainer"> · <a href="https://langflow.org/preferences">Manage Privacy Choices</a></span>
|
||
</div></li></ul></div></div><div class="footer__bottom text--center"><div class="margin-bottom--sm"><img src="/img/lf-docs-light.svg" alt="Langflow" class="footer__logo themedComponent_mlkZ themedComponent--light_NVdE" width="160" height="40"><img src="/img/lf-docs-dark.svg" alt="Langflow" class="footer__logo themedComponent_mlkZ themedComponent--dark_xIcU" width="160" height="40"></div></div></div></footer><div style="position:fixed;right:20px;bottom:20px;z-index:100;display:flex;align-items:center;gap:10px;cursor:pointer"><div style="background-color:#f6f6f6;border-radius:50%;width:48px;height:48px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 4px rgba(0,0,0,0.1)"><img src="/img/langflow-icon-black-transparent.svg" style="width:40px" alt="Search"></div></div></div>
|
||
</body>
|
||
</html> |