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</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_z5aJ"><div class="docItemContainer_c0TR"><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" aria-hidden="true" focusable="false" role="presentation" class="breadcrumbHomeIcon_xK9p"><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">Logs endpoints</span></li></ul></nav><div class="docMetaRow_c2hx"><div class="root_Eutc"><button type="button" class="button_gpNY"><span aria-hidden="true" class="icon_Bm9L"><svg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="lucide lucide-copy"><rect width="14" height="14" x="8" y="8" rx="2" ry="2"></rect><path d="M4 16c-1.1 0-2-.9-2-2V4c0-1.1.9-2 2-2h10c1.1 0 2 .9 2 2"></path></svg></span><span class="label_LzDG">Copy page</span></button></div><span class="theme-doc-version-badge badge badge--secondary">Version: 1.10.x</span></div><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>Logs endpoints</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>Retrieve logs for your Langflow flows and server.</p>
|
||
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id="enable-log-retrieval">Enable log retrieval<a href="#enable-log-retrieval" class="hash-link" aria-label="Direct link to Enable log retrieval" title="Direct link to Enable log retrieval" translate="no"></a></h2>
|
||
<p>The <code>/logs</code> endpoint requires log retrieval to be enabled in your Langflow instance.</p>
|
||
<p>To enable log retrieval, set the following <a class="" href="/environment-variables">environment variables</a> in your Langflow <code>.env</code> file, and then start Langflow with <code>uv run langflow run --env-file .env</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>LANGFLOW_ENABLE_LOG_RETRIEVAL=True</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>LANGFLOW_LOG_RETRIEVER_BUFFER_SIZE=10000 // Must be greater than 0</span></div></div><div><span class="ch-code-line-number">_<!-- -->10</span><div style="display:inline-block;margin-left:16px"><span>LANGFLOW_LOG_LEVEL=DEBUG // Can be DEBUG, ERROR, INFO, WARNING, or CRITICAL</span></div></div><br></code></div></div>
|
||
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id="stream-logs">Stream logs<a href="#stream-logs" class="hash-link" aria-label="Direct link to Stream logs" title="Direct link to Stream logs" translate="no"></a></h2>
|
||
<p>Stream logs in real-time using Server Sent Events (SSE):</p>
|
||
<div class="theme-tabs-container tabs-container tabList__CuJ"><ul role="tablist" aria-orientation="horizontal" class="tabs"><li role="tab" tabindex="0" aria-selected="true" class="tabs__item tabItem_LNqP tabs__item--active">Python</li><li role="tab" tabindex="-1" aria-selected="false" class="tabs__item tabItem_LNqP">JavaScript</li><li role="tab" tabindex="-1" aria-selected="false" class="tabs__item tabItem_LNqP">curl</li></ul><div class="margin-top--md"><div role="tabpanel" class="tabItem_Ymn6"><div class="ch-codeblock" style="margin-top:1.25em;margin-bottom:1.25em;border-radius:6px;overflow:hidden;box-shadow:0 13px 27px -5px rgba(50,50,93,0.25), 0 8px 16px -8px rgba(0,0,0,0.3);--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><div class="ch-code-wrapper" data-ch-measured="true" style="--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><code class="ch-code-scroll-parent" data-ch-lang="python" style="display:block;padding:1rem"><span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">1</span>import os<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">2</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">3</span>import requests<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">4</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">5</span>base = os.environ.get("LANGFLOW_URL") or os.environ.get("LANGFLOW_SERVER_URL", "")<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">6</span>api_key = os.environ.get("LANGFLOW_API_KEY", "")<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">7</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">8</span># `/logs-stream` is an SSE endpoint. For doc example stability, only read a small<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">9</span># number of events, then close the connection.<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">10</span>url = f"{base}/logs-stream"<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">11</span>headers = {"accept": "text/event-stream", "x-api-key": api_key}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">12</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">13</span>response = requests.get(url, headers=headers, stream=True, timeout=30)<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">14</span>response.raise_for_status()<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">15</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">16</span>events_read = 0<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">17</span>chunks: list[str] = []<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">18</span>for line in response.iter_lines(decode_unicode=True):<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">19</span> if line:<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">20</span> chunks.append(line)<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">21</span> events_read += 1<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">22</span> if events_read >= 3:<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">23</span> break<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">24</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">25</span>response.close()<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">26</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">27</span>print("\n".join(chunks))<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">28</span>
|
||
</code><button type="button" title="Copy code" class="ch-code-button"><svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="1.1em" height="1.1em"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.6" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg></button></div></div></div><div role="tabpanel" class="tabItem_Ymn6" hidden=""><div class="ch-codeblock" style="margin-top:1.25em;margin-bottom:1.25em;border-radius:6px;overflow:hidden;box-shadow:0 13px 27px -5px rgba(50,50,93,0.25), 0 8px 16px -8px rgba(0,0,0,0.3);--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><div class="ch-code-wrapper" data-ch-measured="true" style="--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><code class="ch-code-scroll-parent" data-ch-lang="javascript" style="display:block;padding:1rem"><span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">1</span>const url = `${process.env.LANGFLOW_URL ?? ""}/logs-stream`;<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">2</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">3</span>const options = {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">4</span> method: 'GET',<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">5</span> headers: {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">6</span> "accept": `text/event-stream`,<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">7</span> "x-api-key": `${process.env.LANGFLOW_API_KEY ?? ""}`,<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">8</span> },<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">9</span>};<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">10</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">11</span>fetch(url, options)<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">12</span> .then(async (response) => {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">13</span> if (!response.ok) {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">14</span> throw new Error(`HTTP ${response.status}`);<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">15</span> }<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">16</span> const text = await response.text();<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">17</span> console.log(text);<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">18</span> })<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">19</span> .catch((error) => console.error(error));<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">20</span>
|
||
</code><button type="button" title="Copy code" class="ch-code-button"><svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="1.1em" height="1.1em"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.6" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg></button></div></div></div><div role="tabpanel" class="tabItem_Ymn6" hidden=""><div class="ch-codeblock" style="margin-top:1.25em;margin-bottom:1.25em;border-radius:6px;overflow:hidden;box-shadow:0 13px 27px -5px rgba(50,50,93,0.25), 0 8px 16px -8px rgba(0,0,0,0.3);--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><div class="ch-code-wrapper" data-ch-measured="true" style="--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><code class="ch-code-scroll-parent" data-ch-lang="bash" style="display:block;padding:1rem"><span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">1</span>curl -X GET \<!-- -->
|
||
<span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">2</span> "$LANGFLOW_URL/logs-stream" \<!-- -->
|
||
<span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">3</span> -H "accept: text/event-stream" \<!-- -->
|
||
<span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">4</span> -H "x-api-key: $LANGFLOW_API_KEY"<!-- -->
|
||
<span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">5</span>
|
||
</code><button type="button" title="Copy code" class="ch-code-button"><svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="1.1em" height="1.1em"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.6" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg></button></div></div></div></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" style="margin-top:1.25em;margin-bottom:1.25em;border-radius:6px;overflow:hidden;box-shadow:0 13px 27px -5px rgba(50,50,93,0.25), 0 8px 16px -8px rgba(0,0,0,0.3);--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><div class="ch-code-wrapper" data-ch-measured="true" style="--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><code class="ch-code-scroll-parent" data-ch-lang="text" style="display:block;padding:1rem"><span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">1</span>keepalive<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">2</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">3</span>{"1736355791151": "2025-01-08T12:03:11.151218-0500 DEBUG Building Chat Input\n"}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">4</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">5</span>{"1736355791485": "2025-01-08T12:03:11.485380-0500 DEBUG consumed event add_message-153bcd5d-ef4d-4ece-8cc0-47c6b6a9ef92 (time in queue, 0.0000, client 0.0001)\n"}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">6</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">7</span>{"1736355791499": "2025-01-08T12:03:11.499704-0500 DEBUG consumed event end_vertex-3d7125cd-7b8a-44eb-9113-ed5b785e3cf3 (time in queue, 0.0056, client 0.0047)\n"}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">8</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">9</span>{"1736355791502": "2025-01-08T12:03:11.502510-0500 DEBUG consumed event end-40d0b363-5618-4a23-bbae-487cd0b9594d (time in queue, 0.0001, client 0.0004)\n"}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">10</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">11</span>{"1736355791513": "2025-01-08T12:03:11.513097-0500 DEBUG Logged vertex build: 729ff2f8-6b01-48c8-9ad0-3743c2af9e8a\n"}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">12</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">13</span>{"1736355791834": "2025-01-08T12:03:11.834982-0500 DEBUG Telemetry data sent successfully.\n"}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">14</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">15</span>{"1736355791941": "2025-01-08T12:03:11.941840-0500 DEBUG Telemetry data sent successfully.\n"}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">16</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">17</span>keepalive<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">18</span>
|
||
</code><button type="button" title="Copy code" class="ch-code-button"><svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="1.1em" height="1.1em"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.6" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg></button></div></div></div></div></details>
|
||
<h2 class="anchor anchorTargetStickyNavbar_Vzrq" id="retrieve-logs-with-optional-parameters">Retrieve logs with optional parameters<a href="#retrieve-logs-with-optional-parameters" class="hash-link" aria-label="Direct link to Retrieve logs with optional parameters" title="Direct link to Retrieve logs with optional parameters" translate="no"></a></h2>
|
||
<p>Retrieve logs with optional query parameters:</p>
|
||
<ul>
|
||
<li class=""><code>lines_before</code>: The number of logs before the timestamp or the last log.</li>
|
||
<li class=""><code>lines_after</code>: The number of logs after the timestamp.</li>
|
||
<li class=""><code>timestamp</code>: The timestamp to start getting logs from.</li>
|
||
</ul>
|
||
<p>The default values for all three parameters is <code>0</code>.
|
||
With default values, the endpoint returns the last 10 lines of logs.</p>
|
||
<div class="theme-tabs-container tabs-container tabList__CuJ"><ul role="tablist" aria-orientation="horizontal" class="tabs"><li role="tab" tabindex="0" aria-selected="true" class="tabs__item tabItem_LNqP tabs__item--active">Python</li><li role="tab" tabindex="-1" aria-selected="false" class="tabs__item tabItem_LNqP">JavaScript</li><li role="tab" tabindex="-1" aria-selected="false" class="tabs__item tabItem_LNqP">curl</li></ul><div class="margin-top--md"><div role="tabpanel" class="tabItem_Ymn6"><div class="ch-codeblock" style="margin-top:1.25em;margin-bottom:1.25em;border-radius:6px;overflow:hidden;box-shadow:0 13px 27px -5px rgba(50,50,93,0.25), 0 8px 16px -8px rgba(0,0,0,0.3);--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><div class="ch-code-wrapper" data-ch-measured="true" style="--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><code class="ch-code-scroll-parent" data-ch-lang="python" style="display:block;padding:1rem"><span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">1</span>import os<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">2</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">3</span>import requests<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">4</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">5</span>url = f"{os.getenv('LANGFLOW_URL', '')}/logs?lines_before=0&lines_after=0&timestamp=0"<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">6</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">7</span>headers = {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">8</span> "accept": "application/json",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">9</span> "x-api-key": f"{os.getenv('LANGFLOW_API_KEY', '')}",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">10</span>}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">11</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">12</span>response = requests.request("GET", url, headers=headers)<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">13</span>response.raise_for_status()<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">14</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">15</span>print(response.text)<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">16</span>
|
||
</code><button type="button" title="Copy code" class="ch-code-button"><svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="1.1em" height="1.1em"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.6" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg></button></div></div></div><div role="tabpanel" class="tabItem_Ymn6" hidden=""><div class="ch-codeblock" style="margin-top:1.25em;margin-bottom:1.25em;border-radius:6px;overflow:hidden;box-shadow:0 13px 27px -5px rgba(50,50,93,0.25), 0 8px 16px -8px rgba(0,0,0,0.3);--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><div class="ch-code-wrapper" data-ch-measured="true" style="--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><code class="ch-code-scroll-parent" data-ch-lang="javascript" style="display:block;padding:1rem"><span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">1</span>const url = `${process.env.LANGFLOW_URL ?? ""}/logs?lines_before=0&lines_after=0&timestamp=0`;<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">2</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">3</span>const options = {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">4</span> method: 'GET',<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">5</span> headers: {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">6</span> "accept": `application/json`,<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">7</span> "x-api-key": `${process.env.LANGFLOW_API_KEY ?? ""}`,<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">8</span> },<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">9</span>};<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">10</span>
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">11</span>fetch(url, options)<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">12</span> .then(async (response) => {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">13</span> if (!response.ok) {<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">14</span> throw new Error(`HTTP ${response.status}`);<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">15</span> }<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">16</span> const text = await response.text();<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">17</span> console.log(text);<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">18</span> })<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">19</span> .catch((error) => console.error(error));<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">20</span>
|
||
</code><button type="button" title="Copy code" class="ch-code-button"><svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="1.1em" height="1.1em"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.6" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg></button></div></div></div><div role="tabpanel" class="tabItem_Ymn6" hidden=""><div class="ch-codeblock" style="margin-top:1.25em;margin-bottom:1.25em;border-radius:6px;overflow:hidden;box-shadow:0 13px 27px -5px rgba(50,50,93,0.25), 0 8px 16px -8px rgba(0,0,0,0.3);--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><div class="ch-code-wrapper" data-ch-measured="true" style="--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><code class="ch-code-scroll-parent" data-ch-lang="bash" style="display:block;padding:1rem"><span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">1</span>curl -X GET \<!-- -->
|
||
<span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">2</span> "$LANGFLOW_URL/logs?lines_before=0&lines_after=0&timestamp=0" \<!-- -->
|
||
<span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">3</span> -H "accept: application/json" \<!-- -->
|
||
<span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">4</span> -H "x-api-key: $LANGFLOW_API_KEY"<!-- -->
|
||
<span class="ch-code-line-number" style="width:1ch;margin-right:1.5ch;display:inline-block;text-align:right">5</span>
|
||
</code><button type="button" title="Copy code" class="ch-code-button"><svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="1.1em" height="1.1em"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.6" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg></button></div></div></div></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" style="margin-top:1.25em;margin-bottom:1.25em;border-radius:6px;overflow:hidden;box-shadow:0 13px 27px -5px rgba(50,50,93,0.25), 0 8px 16px -8px rgba(0,0,0,0.3);--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><div class="ch-code-wrapper" data-ch-measured="true" style="--ch-t-background:#0d1117;--ch-t-foreground:#c9d1d9;--ch-t-colorScheme:dark;--ch-t-editorLineNumber-foreground:#8b949e;--ch-t-editor-selectionBackground:#264f78"><code class="ch-code-scroll-parent" data-ch-lang="text" style="display:block;padding:1rem"><span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">1</span>{<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">2</span> "1736354770500": "2025-01-08T11:46:10.500363-0500 DEBUG Creating starter project Document Q&A\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">3</span> "1736354770511": "2025-01-08T11:46:10.511146-0500 DEBUG Creating starter project Image Sentiment Analysis\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">4</span> "1736354770521": "2025-01-08T11:46:10.521018-0500 DEBUG Creating starter project SEO Keyword Generator\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">5</span> "1736354770532": "2025-01-08T11:46:10.532677-0500 DEBUG Creating starter project Sequential Tasks Agents\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">6</span> "1736354770544": "2025-01-08T11:46:10.544010-0500 DEBUG Creating starter project Custom Component Generator\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">7</span> "1736354770555": "2025-01-08T11:46:10.555513-0500 DEBUG Creating starter project Prompt Chaining\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">8</span> "1736354770588": "2025-01-08T11:46:10.588105-0500 DEBUG Create service ServiceType.CHAT_SERVICE\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">9</span> "1736354771021": "2025-01-08T11:46:11.021817-0500 DEBUG Telemetry data sent successfully.\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">10</span> "1736354775619": "2025-01-08T11:46:15.619545-0500 DEBUG Create service ServiceType.STORE_SERVICE\n",<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">11</span> "1736354775699": "2025-01-08T11:46:15.699661-0500 DEBUG File 046-rocket.svg retrieved successfully from flow /Users/USER/Library/Caches/langflow/profile_pictures/Space.\n"<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">12</span>}<!-- -->
|
||
<span class="ch-code-line-number" style="width:2ch;margin-right:1.5ch;display:inline-block;text-align:right">13</span>
|
||
</code><button type="button" title="Copy code" class="ch-code-button"><svg fill="none" stroke="currentColor" viewBox="0 0 24 24" width="1.1em" height="1.1em"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.6" d="M8 16H6a2 2 0 01-2-2V6a2 2 0 012-2h8a2 2 0 012 2v2m-6 12h8a2 2 0 002-2v-8a2 2 0 00-2-2h-8a2 2 0 00-2 2v8a2 2 0 002 2z"></path></svg></button></div></div></div></div></details></div></article><nav class="docusaurus-mt-lg pagination-nav" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/api-projects"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Projects endpoints</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/api-monitor"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Monitor endpoints</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="#enable-log-retrieval" class="table-of-contents__link toc-highlight">Enable log retrieval</a></li><li><a href="#stream-logs" class="table-of-contents__link toc-highlight">Stream logs</a></li><li><a href="#retrieve-logs-with-optional-parameters" class="table-of-contents__link toc-highlight">Retrieve logs with optional parameters</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">
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