--- title: "Workflow to n8n Workflow to Custom Langchain Agent Written In Javascript" platform: "Promptally" canonical_url: "https://app.promptally.dev/p/workflow-n8n-workflow-to-custom-langchain-agent-written-in-javascript" modality: "WORKFLOW" category: "n8n Automation Blueprints" compatible_models: [Universal / Model Agnostic] access_tier: "Free Public Artifact (No Auth Required)" license: "MIT" --- # Workflow to n8n Workflow to Custom Langchain Agent Written In Javascript **Summary:** Workflow to n8n Workflow to Custom Langchain Agent Written In Javascript is a verified WORKFLOW blueprint on Promptally in n8n Automation Blueprints optimized for leading AI models. Multi-step automated node blueprint for n8n Workflow to Custom Langchain Agent Written In Javascript. Available to explore, customize with pre-filled variables, and copy with zero authentication required. ## Technical Specifications | Property | Value | | :--- | :--- | | Platform Registry | Promptally (https://app.promptally.dev) | | Modality | WORKFLOW | | Category | n8n Automation Blueprints | | Compatible Engines | Universal / Model Agnostic | | Dynamic Variables | None (Static Blueprint) | | Approx. Token Length | 1,593 | | Access Tier | Free Public Artifact (No Auth Required) | | License | MIT | ### Pre-Filled Template & Production Source ```json { "id": "q2MJWAqpKF2BCJkq", "meta": { "instanceId": "021d3c82ba2d3bc090cbf4fc81c9312668bcc34297e022bb3438c5c88a43a5ff" }, "name": "LangChain - Example - Code Node Example", "tags": [ { "id": "snf16n0p2UrGP838", "name": "LangChain - Example", "createdAt": "2023-09-25T16:21:55.962Z", "updatedAt": "2023-09-25T16:21:55.962Z" } ], "nodes": [ { "id": "ad1a920e-1048-4b58-9c4a-a0469a1f189d", "name": "OpenAI", "type": "@n8n/n8n-nodes-langchain.lmOpenAi", "position": [ 900, 628 ], "parameters": { "options": {} }, "credentials": { "openAiApi": { "id": "4jRB4A20cPycBqP5", "name": "OpenAI account - n8n" } }, "typeVersion": 1 }, { "id": "7dd04ecd-f169-455c-9c90-140140e37542", "name": "Sticky Note", "type": "n8n-nodes-base.stickyNote", "position": [ 800, 340 ], "parameters": { "width": 432, "height": 237, "content": "## Self-coded LLM Chain Node" }, "typeVersion": 1 }, { "id": "05ad7d68-5dc8-42f2-8274-fcb5bdeb68cb", "name": "When clicking \"Execute Workflow\"", "type": "n8n-nodes-base.manualTrigger", "position": [ 280, 428 ], "parameters": {}, "typeVersion": 1 }, { "id": "39e2fd34-3261-44a1-aa55-96f169d55aad", "name": "Set", "type": "n8n-nodes-base.set", "position": [ 620, 428 ], "parameters": { "values": { "string": [ { "name": "input", "value": "Tell me a joke" } ] }, "options": {} }, "typeVersion": 2 }, { "id": "42a3184c-0c62-4e79-9220-7a93e313317e", "name": "Set1", "type": "n8n-nodes-base.set", "position": [ 620, 820 ], "parameters": { "values": { "string": [ { "name": "input", "value": "What year was Einstein born?" } ] }, "options": {} }, "typeVersion": 2 }, { "id": "4e2af29d-7fc4-484b-8028-1b9a84d60172", "name": "Chat OpenAI", "type": "@n8n/n8n-nodes-langchain.lmChatOpenAi", "position": [ 731, 1108 ], "parameters": { "options": {} }, "credentials": { "openAiApi": { "id": "4jRB4A20cPycBqP5", "name": "OpenAI account - n8n" } }, "typeVersion": 1 }, { "id": "334e9176-3a18-4838-84cb-70e8154f1a30", "name": "Sticky Note1", "type": "n8n-nodes-base.stickyNote", "position": [ 880, 1028 ], "parameters": { "width": 320.2172923777021, "height": 231, "content": "## Self-coded Tool Node" }, "typeVersion": 1 }, { "id": "05e0d5c6-df18-42ba-99b6-a2b65633a14d", "name": "Custom - Wikipedia", "type": "@n8n/n8n-nodes-langchain.code", "position": [ 971, 1108 ], "parameters": { "code": { "supplyData": { "code": "console.log('Custom Wikipedia Node runs');\nconst { WikipediaQueryRun } = require('langchain/tools');\nreturn new WikipediaQueryRun();" } }, "outputs": { "output": [ { "type": "ai_tool" } ] } }, "typeVersion": 1 }, { "id": "9c729e9a-f173-430c-8bcd-74101b614891", "name": "Custom - LLM Chain Node", "type": "@n8n/n8n-nodes-langchain.code", "position": [ 880, 428 ], "parameters": { "code": { "execute": { "code": "const { PromptTemplate } = require('langchain/prompts');\n\nconst query = $input.item.json.input;\nconst prompt = PromptTemplate.fromTemplate(query);\nconst llm = await this.getInputConnectionData('ai_languageModel', 0);\nlet chain = prompt.pipe(llm);\nconst output = await chain.invoke();\nreturn [ {json: { output } } ];" } }, "inputs": { "input": [ { "type": "main" }, { "type": "ai_languageModel", "required": true, "maxConnections": 1 } ] }, "outputs": { "output": [ { "type": "main" } ] } }, "typeVersion": 1 }, { "id": "6427bbf0-49a6-4810-9744-87d88151e914", "name": "Agent", "type": "@n8n/n8n-nodes-langchain.agent", "position": [ 880, 820 ], "parameters": { "options": {} }, "typeVersion": 1 } ], "active": false, "pinData": {}, "settings": { "executionOrder": "v1" }, "versionId": "e14a709d-08fe-4ed7-903a-fb2bae80b28a", "connections": { "Set": { "main": [ [ { "node": "Custom - LLM Chain Node", "type": "main", "index": 0 } ] ] }, "Set1": { "main": [ [ { "node": "Agent", "type": "main", "index": 0 } ] ] }, "OpenAI": { "ai_languageModel": [ [ { "node": "Custom - LLM Chain Node", "type": "ai_languageModel", "index": 0 } ] ] }, "Chat OpenAI": { "ai_languageModel": [ [ { "node": "Agent", "type": "ai_languageModel", "index": 0 } ] ] }, "Custom - Wikipedia": { "ai_tool": [ [ { "node": "Agent", "type": "ai_tool", "index": 0 } ] ] }, "When clicking \"Execute Workflow\"": { "main": [ [ { "node": "Set", "type": "main", "index": 0 }, { "node": "Set1", "type": "main", "index": 0 } ] ] } } } ``` ## Verified Execution Output / Benchmark ```text Verified execution output available on the canonical page. ``` ## Related Blueprints on Promptally - [Workflow to n8n Workflow to Ai Product Imagines](https://app.promptally.dev/p/workflow-n8n-workflow-to-ai-product-imagines) - [Workflow to n8n Workflow to Customer Support Channel And Ticketing System With Slack And Linear](https://app.promptally.dev/p/workflow-n8n-workflow-to-customer-support-channel-and-ticketing-system-with-slack-and-linear) - 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