n8n
Workflow
Custom Langchain Agent Written In Javascript
This n8n workflow automates tasks and integrates with various services. Custom Langchain Agent Written In Javascript - ready to import and run in your n8n instance.
n8n
workflow.json
About This Script
This n8n workflow automates tasks and integrates with various services. Custom Langchain Agent Written In Javascript - ready to import and run in your n8n instance.
Features:
- Automates workflow tasks
- Ready to import into n8n
- Configurable parameters
Source Code
{
"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": "Configuration note: update with your credentials or endpoint.",
"color": "#FFF59D"
},
"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": "Configuration note: update with your credentials or endpoint.",
"color": "#FFF59D"
},
"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
}
],
"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
}
]
]
}
},
"n8n_version": "1.5.0"
}Requirements
n8n instance, API credentials for connected services
Tags
#n8n
#automation
#workflow