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itemprop="name">MCP (Model context protocol)</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>Integrate Langflow with MCP (Model context protocol)</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>
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<p>Langflow integrates with the <a href="https://modelcontextprotocol.io/introduction" target="_blank" rel="noopener noreferrer">Model Context Protocol (MCP)</a>. This allows you to use your Langflow flows as tools in other applications that support the MCP, or extend Langflow with the <a href="/components-tools#mcp-tools-stdio">MCP stdio component</a> to access MCP servers.</p>
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<p>You can use Langflow as an MCP server with any <a href="https://modelcontextprotocol.io/clients" target="_blank" rel="noopener noreferrer">MCP client</a>.
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For example purposes, this guide presents two ways to interact with the MCP:</p>
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<ul>
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<li><a href="#access-all-of-your-flows-as-tools-from-claude-for-desktop">Access all of your flows as tools from Claude for Desktop</a></li>
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<li><a href="#connect-an-astra-db-mcp-server-to-langflow">Use the MCP stdio component to connect Langflow to a Datastax Astra DB MCP server</a></li>
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</ul>
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<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="access-all-of-your-flows-as-tools-from-claude-for-desktop">Access all of your flows as tools from Claude for Desktop<a href="#access-all-of-your-flows-as-tools-from-claude-for-desktop" class="hash-link" aria-label="Direct link to Access all of your flows as tools from Claude for Desktop" title="Direct link to Access all of your flows as tools from Claude for Desktop"></a></h2>
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<ol>
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<li>
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<p>Install <a href="https://claude.ai/download" target="_blank" rel="noopener noreferrer">Claude for Desktop</a>.</p>
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</li>
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<li>
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<p>Install <a href="https://docs.astral.sh/uv/getting-started/installation/" target="_blank" rel="noopener noreferrer">uv</a> so that you can run <code>uvx</code> commands.</p>
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</li>
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<li>
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<p>Create at least one flow, and note your host. For example, <code>http://127.0.0.1:7863</code>.</p>
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</li>
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<li>
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<p>Open Claude for Desktop, and then go to the program settings.
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For example, on the MacOS menu bar, click <strong>Claude</strong>, and then select <strong>Settings</strong>.</p>
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</li>
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<li>
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<p>In the <strong>Settings</strong> dialog, click <strong>Developer</strong>, and then click <strong>Edit Config</strong>.
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This creates a <code>claude_desktop_config.json</code> file if you don't already have one.</p>
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</li>
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<li>
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<p>Add the following code to <code>claude_desktop_config.json</code>.
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Your args may differ for your <code>uvx</code> and <code>Python</code> installations. To find the correct paths:</p>
|
||
<ul>
|
||
<li>For <code>uvx</code>: Run <code>which uvx</code> in your terminal</li>
|
||
<li>For Python: Run <code>which python</code> in your terminal</li>
|
||
</ul>
|
||
</li>
|
||
</ol>
|
||
<p>Replace <code>/path/to/uvx</code> and <code>/path/to/python</code> with the paths from your system:</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">_<!-- -->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> "mcpServers": {</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> "langflow": {</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> "command": "/bin/sh",</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> "args": ["-c", "/path/to/uvx --python /path/to/python mcp-sse-shim@latest"],</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> "env": {</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> "MCP_HOST": "http://127.0.0.1:7864",</span></div></div><div><span class="ch-code-line-number">_<!-- -->12</span><div style="display:inline-block;margin-left:16px"><span> "DEBUG": "true"</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> }</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>}</span></div></div><br></code></div></div>
|
||
<p>This code adds a new MCP server called <code>langflow</code> and starts the <a href="https://github.com/phact/mcp-sse-shim" target="_blank" rel="noopener noreferrer">mcp-sse-shim</a> package using the specified Python interpreter and uvx.</p>
|
||
<ol start="7">
|
||
<li>Restart Claude for Desktop.
|
||
Your new tools are available in your chat window. Click the tools icon to see a list of your flows.</li>
|
||
</ol>
|
||
<p>You can now use your flows as tools in Claude for Desktop.
|
||
Claude determines when to use tools based on your queries, and will request permissions when necessary.</p>
|
||
<h2 class="anchor anchorWithHideOnScrollNavbar_WYt5" id="connect-an-astra-db-mcp-server-to-langflow">Connect an Astra DB MCP server to Langflow<a href="#connect-an-astra-db-mcp-server-to-langflow" class="hash-link" aria-label="Direct link to Connect an Astra DB MCP server to Langflow" title="Direct link to Connect an Astra DB MCP server to Langflow"></a></h2>
|
||
<p>Use the <a href="/components-tools#mcp-tools-stdio">MCP stdio component</a> to connect Langflow to a <a href="https://github.com/datastax/astra-db-mcp" target="_blank" rel="noopener noreferrer">Datastax Astra DB MCP server</a>.</p>
|
||
<ol>
|
||
<li>Install an LTS release of <a href="https://docs.npmjs.com/downloading-and-installing-node-js-and-npm" target="_blank" rel="noopener noreferrer">Node.js</a>.</li>
|
||
<li>Create an <a href="https://platform.openai.com/" target="_blank" rel="noopener noreferrer">OpenAI</a> API key.</li>
|
||
<li>Create an <a href="https://docs.datastax.com/en/astra-db-serverless/databases/create-database.html#create-vector-database" target="_blank" rel="noopener noreferrer">Astra DB Serverless (Vector) database</a>, if you don't already have one.</li>
|
||
<li>Get your database's <strong>Astra DB API endpoint</strong> and an <strong>Astra DB application token</strong> with the Database Administrator role. For more information, see <a href="https://docs.datastax.com/en/astra-db-serverless/administration/manage-application-tokens.html#database-token" target="_blank" rel="noopener noreferrer">Generate an application token for a database</a>.</li>
|
||
<li>Add your <strong>Astra DB application token</strong> and <strong>Astra API endpoint</strong> to Langflow as <a href="/configuration-global-variables">global variables</a>.</li>
|
||
<li>Create a <a href="/starter-projects-simple-agent">Simple agent starter project</a>.</li>
|
||
<li>Remove the <strong>URL</strong> tool and replace it with an <a href="/components-tools#mcp-tools-stdio">MCP stdio component</a> component.
|
||
The flow should look like this:
|
||
<img decoding="async" loading="lazy" alt="MCP stdio component" src="/assets/images/mcp-stdio-component-860817f2217f383380e3be273b9beaf7.png" width="2438" height="1552" class="img_ev3q"></li>
|
||
<li>In the <strong>MCP stdio</strong> component, in the <strong>MCP command</strong> field, add the following code:</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>npx -y @datastax/astra-db-mcp</span></div></div><br></code></div></div>
|
||
<ol start="9">
|
||
<li>In the <strong>Agent</strong> component, add your <strong>OpenAI API key</strong>.</li>
|
||
<li>Open the <strong>Playground</strong>.
|
||
Langflow is now connected to your Astra DB database through the MCP.
|
||
You can use the MCP to create, read, update, and delete data from your database.</li>
|
||
</ol></div></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/integrations-langwatch"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">LangWatch</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/integrations-setup-google-oauth-langflow"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Integrate Google OAuth with Langflow</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="#access-all-of-your-flows-as-tools-from-claude-for-desktop" class="table-of-contents__link toc-highlight">Access all of your flows as tools from Claude for Desktop</a></li><li><a href="#connect-an-astra-db-mcp-server-to-langflow" class="table-of-contents__link toc-highlight">Connect an Astra DB MCP server to Langflow</a></li></ul></div></div></div></div></main></div></div></div><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>
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