This workflow follows the Chainllm → Google Gemini Chat recipe pattern — see all workflows that pair these two integrations.
The workflow JSON
Copy or download the full n8n JSON below. Paste it into a new n8n workflow, add your credentials, activate. Full import guide →
{
"name": "WebAPI Server Demo",
"nodes": [
{
"parameters": {
"rules": {
"values": [
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"leftValue": "={{ $json.body.method }}",
"rightValue": "Multiply",
"operator": {
"type": "string",
"operation": "equals"
},
"id": "84f3562a-1e3c-4e20-8601-ec3d2a5f3dc5"
}
],
"combinator": "and"
}
},
{
"conditions": {
"options": {
"caseSensitive": true,
"leftValue": "",
"typeValidation": "strict",
"version": 2
},
"conditions": [
{
"id": "386544cc-7346-40e8-ab6f-906c2ad8f796",
"leftValue": "={{ $json.body.method }}",
"rightValue": "Plus",
"operator": {
"type": "string",
"operation": "equals",
"name": "filter.operator.equals"
}
}
],
"combinator": "and"
}
}
]
},
"options": {}
},
"type": "n8n-nodes-base.switch",
"typeVersion": 3.2,
"position": [
-1640,
-280
],
"id": "2badeb10-f849-4eab-b649-243e8d5884fe",
"name": "Switch"
},
{
"parameters": {
"workflowId": {
"__rl": true,
"value": "7rc5OeZVf1NgP8Fd",
"mode": "list",
"cachedResultName": "SubFlow: \u52a0\u6cd5"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"num2": "={{ $json.body.num2 }}",
"num1": "={{ $json.body.num1 }}"
},
"matchingColumns": [],
"schema": [
{
"id": "num1",
"displayName": "num1",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "number",
"removed": false
},
{
"id": "num2",
"displayName": "num2",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "number",
"removed": false
}
],
"attemptToConvertTypes": false,
"convertFieldsToString": true
},
"options": {}
},
"type": "n8n-nodes-base.executeWorkflow",
"typeVersion": 1.2,
"position": [
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-200
],
"id": "68d31307-fb95-4b70-bba6-17257f2d5077",
"name": "\u8c03\u7528\u5b50\u6d41\u7a0b\uff1a\u52a0\u6cd5"
},
{
"parameters": {
"promptType": "define",
"text": "={{ $json.query.question }}"
},
"type": "@n8n/n8n-nodes-langchain.chainLlm",
"typeVersion": 1.6,
"position": [
-1680,
260
],
"id": "bf013f78-2f82-48d1-a1ac-0b44571f0188",
"name": "Basic LLM Chain"
},
{
"parameters": {
"modelName": "models/gemini-2.0-flash",
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.lmChatGoogleGemini",
"typeVersion": 1,
"position": [
-1600,
380
],
"id": "f3d8c349-7dd4-4abb-82f6-7522c6a3ff3f",
"name": "Google Gemini Chat Model",
"credentials": {
"googlePalmApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"respondWith": "text",
"responseBody": "={{ new Date().toLocaleString('zh-CN') + \": \" + $json.text }}",
"options": {}
},
"type": "n8n-nodes-base.respondToWebhook",
"typeVersion": 1.1,
"position": [
-1360,
260
],
"id": "a5bc65d1-1165-494d-b497-45febc7597ff",
"name": "Respond to Webhook"
},
{
"parameters": {
"path": "Labs",
"responseMode": "lastNode",
"options": {}
},
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
-1860,
20
],
"id": "b449e60b-42be-49ce-8f63-e9a2ab6ad0d1",
"name": "Webhook: Get: Labs"
},
{
"parameters": {
"httpMethod": "POST",
"path": "Labs",
"responseMode": "lastNode",
"options": {}
},
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
-1860,
-280
],
"id": "96b83520-2612-4b6b-ac87-702864dd20be",
"name": "Webhook:Post: Labs"
},
{
"parameters": {
"content": "POST\u65b9\u6cd5\uff0cBODY\u4e3aJSON\u6570\u636e\uff0c\u8def\u5f84Labs\uff0c\u4f7f\u7528method\u5b57\u6bb5\u505a\u5206\u652f\u5224\u5b9a",
"height": 360,
"width": 760,
"color": 3
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
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-400
],
"id": "58286176-f8c0-4ea8-8028-7023caee9e3d",
"name": "Sticky Note",
"disabled": true
},
{
"parameters": {
"content": "GET\u65b9\u6cd5\uff0c\u8def\u5f84Labs\uff0c\u4f7f\u7528num1\u548cnum2\u4e24\u4e2a\u53c2\u6570",
"height": 200,
"width": 760
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-1960,
-20
],
"id": "9d9f06f2-c71c-4cf7-86b2-ee91f49bcda5",
"name": "Sticky Note1",
"disabled": true
},
{
"parameters": {
"content": "Get\u65b9\u6cd5\uff0c\u8def\u5f84Labs/Chat\uff0c\u53c2\u6570Question",
"height": 320,
"width": 760
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-1960,
200
],
"id": "c4792472-7875-4642-a716-19b36f1ed143",
"name": "Sticky Note2",
"disabled": true
},
{
"parameters": {
"path": "Labs/Chat",
"responseMode": "responseNode",
"options": {}
},
"type": "n8n-nodes-base.webhook",
"typeVersion": 2,
"position": [
-1860,
260
],
"id": "6559a1b3-a7fa-4eb6-b152-0ce7337ce709",
"name": "Webhook: Get: AILabs"
},
{
"parameters": {
"workflowId": {
"__rl": true,
"value": "E88FuwvJfSfnj5Pa",
"mode": "list",
"cachedResultName": "SubFlow: \u7ffb\u8bd1"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"content": "={{ $json.query.content }}",
"language": "={{ $json.query.language }}"
},
"matchingColumns": [],
"schema": [
{
"id": "content",
"displayName": "content",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string",
"removed": false
},
{
"id": "language",
"displayName": "language",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "string",
"removed": false
}
],
"attemptToConvertTypes": true,
"convertFieldsToString": true
},
"options": {}
},
"type": "n8n-nodes-base.executeWorkflow",
"typeVersion": 1.2,
"position": [
-1420,
20
],
"id": "7bb6bbc7-8bee-4734-95cf-8492297911b0",
"name": "\u8c03\u7528\u5b50\u6d41\u7a0b\uff1a\u7ffb\u8bd1"
},
{
"parameters": {
"workflowId": {
"__rl": true,
"value": "svnAhhdWf0VQFKEj",
"mode": "list",
"cachedResultName": "SubFlow: \u4e58\u6cd5"
},
"workflowInputs": {
"mappingMode": "defineBelow",
"value": {
"num2": "={{ $json.body.num2 }}",
"num1": "={{ $json.body.num1 }}"
},
"matchingColumns": [],
"schema": [
{
"id": "num1",
"displayName": "num1",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "number",
"removed": false
},
{
"id": "num2",
"displayName": "num2",
"required": false,
"defaultMatch": false,
"display": true,
"canBeUsedToMatch": true,
"type": "number",
"removed": false
}
],
"attemptToConvertTypes": false,
"convertFieldsToString": true
},
"options": {}
},
"type": "n8n-nodes-base.executeWorkflow",
"typeVersion": 1.2,
"position": [
-1420,
-380
],
"id": "b50b3e85-9f5f-48cb-8c9e-fda49dc94bd5",
"name": "\u8c03\u7528\u5b50\u6d41\u7a0b\uff1a\u4e58\u6cd5"
}
],
"connections": {
"Switch": {
"main": [
[
{
"node": "\u8c03\u7528\u5b50\u6d41\u7a0b\uff1a\u4e58\u6cd5",
"type": "main",
"index": 0
}
],
[
{
"node": "\u8c03\u7528\u5b50\u6d41\u7a0b\uff1a\u52a0\u6cd5",
"type": "main",
"index": 0
}
]
]
},
"Google Gemini Chat Model": {
"ai_languageModel": [
[
{
"node": "Basic LLM Chain",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Basic LLM Chain": {
"main": [
[
{
"node": "Respond to Webhook",
"type": "main",
"index": 0
}
]
]
},
"Webhook: Get: Labs": {
"main": [
[
{
"node": "\u8c03\u7528\u5b50\u6d41\u7a0b\uff1a\u7ffb\u8bd1",
"type": "main",
"index": 0
}
]
]
},
"Webhook:Post: Labs": {
"main": [
[
{
"node": "Switch",
"type": "main",
"index": 0
}
]
]
},
"Webhook: Get: AILabs": {
"main": [
[
{
"node": "Basic LLM Chain",
"type": "main",
"index": 0
}
]
]
}
},
"active": true,
"settings": {
"executionOrder": "v1"
},
"versionId": "9850b5d3-a67a-4a5f-aad6-bb770e36a8ed",
"meta": {
"templateCredsSetupCompleted": true
},
"id": "FJShRs5l1T3ldwUx",
"tags": []
}
Credentials you'll need
Each integration node will prompt for credentials when you import. We strip credential IDs before publishing — you'll add your own.
googlePalmApi
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About this workflow
WebAPI Server Demo. Uses chainLlm, lmChatGoogleGemini. Webhook trigger; 13 nodes.
Source: https://github.com/rv192/CommonRepo/blob/58237e8543787c0ee858f3fb863ee071651cd00c/n8n/series/WebAPI_Server_Demo.json — original creator credit. Request a take-down →
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