This workflow follows the Agent → Chat Trigger 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": "API Calls in n8n",
"nodes": [
{
"parameters": {
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"typeVersion": 1.1,
"position": [
-40,
840
],
"id": "750571fe-bc86-41ea-adbf-ba964bce9d90",
"name": "When chat message received"
},
{
"parameters": {
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.agent",
"typeVersion": 1.9,
"position": [
120,
840
],
"id": "a93fa776-ef72-40ac-9b38-3ff999a1aa12",
"name": "AI Agent"
},
{
"parameters": {
"model": "openai/gpt-4.1-mini",
"options": {}
},
"type": "@n8n/n8n-nodes-langchain.lmChatOpenRouter",
"typeVersion": 1,
"position": [
60,
1020
],
"id": "102998b0-2182-4a04-ba31-d2f18318de72",
"name": "GPT 4.1-mini",
"credentials": {
"openRouterApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"format": "imperial",
"locationSelection": "coordinates",
"latitude": "41.8781",
"longitude": "-87.6298"
},
"type": "n8n-nodes-base.openWeatherMap",
"typeVersion": 1,
"position": [
0,
540
],
"id": "16c4d152-d905-49a5-9013-b476f7f2a4d3",
"name": "OpenWeatherMap",
"credentials": {
"openWeatherMapApi": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"url": "https://api.openweathermap.org/data/2.5/weather",
"sendQuery": true,
"queryParameters": {
"parameters": [
{
"name": "lat",
"value": "41.8781"
},
{
"name": "lon",
"value": "-87.6298"
},
{
"name": "appid",
"value": "13831c48ef7b2aaf25ba7a713292f8f3"
},
{
"name": "units",
"value": "imperial"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
220,
540
],
"id": "9d67245b-e06f-423f-93ef-91de3879faaa",
"name": "OpenWeather HTTP"
},
{
"parameters": {
"content": "# Native vs. HTTP",
"height": 280,
"width": 600,
"color": 4
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-100,
440
],
"id": "84cdb3ef-9a6c-4c5d-abbe-362ee17f9ed7",
"name": "Sticky Note"
},
{
"parameters": {
"content": "# HTTP Requests for Agents\n",
"height": 440,
"width": 600,
"color": 5
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-100,
740
],
"id": "17437cee-1245-4ffc-8f43-bc9a13c488cd",
"name": "Sticky Note1"
},
{
"parameters": {
"method": "POST",
"url": "https://api.perplexity.ai/chat/completions",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"model\": \"sonar\",\n \"messages\": [\n {\n \"role\": \"system\",\n \"content\": \"Be precise and concise.\"\n },\n {\n \"role\": \"user\",\n \"content\": \"{{ $fromAI(\"searchTerm\") }}\"\n }\n ]\n}",
"options": {}
},
"type": "n8n-nodes-base.httpRequestTool",
"typeVersion": 4.2,
"position": [
340,
1020
],
"id": "3f589560-2991-4c75-863e-1716a42a6cc1",
"name": "Web Search",
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"method": "POST",
"url": "https://api.tavily.com/search",
"authentication": "genericCredentialType",
"genericAuthType": "httpHeaderAuth",
"sendBody": true,
"specifyBody": "json",
"jsonBody": "={\n \"query\": \"{{ $json.query }}\",\n \"topic\": \"general\",\n \"search_depth\": \"basic\",\n \"chunks_per_source\": 3,\n \"max_results\": 1,\n \"time_range\": null,\n \"days\": 7,\n \"include_answer\": true,\n \"include_raw_content\": false,\n \"include_images\": false,\n \"include_image_descriptions\": false,\n \"include_domains\": [],\n \"exclude_domains\": []\n}",
"options": {}
},
"type": "n8n-nodes-base.httpRequest",
"typeVersion": 4.2,
"position": [
260,
1300
],
"id": "fcc08012-2edf-4b3d-8ee9-7e912aaf16aa",
"name": "Tavily",
"credentials": {
"httpHeaderAuth": {
"name": "<your credential>"
}
}
},
{
"parameters": {
"assignments": {
"assignments": [
{
"id": "6f7a5a6a-d14e-4e29-b81e-30e24a059c38",
"name": "query",
"value": "pineapples on pizza",
"type": "string"
}
]
},
"options": {}
},
"type": "n8n-nodes-base.set",
"typeVersion": 3.4,
"position": [
20,
1300
],
"id": "1ed530a2-fe97-4331-8881-4c7d7817be93",
"name": "Set"
},
{
"parameters": {
"content": "# Variable in Body Request",
"height": 280,
"width": 600,
"color": 6
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-100,
1200
],
"id": "9284c7dc-a60a-462b-9fec-14d7deef4d2e",
"name": "Sticky Note2"
},
{
"parameters": {
"content": "# \ud83d\udee0 Setup Guide \n**Author:** [Nate Herk](https://www.youtube.com/@nateherk)\n\nTo connect the APIs and get started playing around, you need to connect the following credentials to the corresponding nodes:\n\n1. **OpenWeather Map** \u2013 [https://openweathermap.org/api](https://openweathermap.org/api) \n \u21b3 Make sure to grab your API key and set it in the OpenWeather node.\n\n2. **Perplexity** \u2013 [https://www.perplexity.ai/](https://www.perplexity.ai/) \n \u21b3 Generate your API key and configure it under HTTP Request or a custom node.\n\n3. **Tavily** \u2013 [https://tavily.com/](https://tavily.com/) \n \u21b3 Sign up, retrieve your API key, and link it to the Tavily Search node or HTTP Request node.\n\nOnce all three are connected, you\u2019re ready to start building and experimenting with workflows!\n",
"height": 500,
"width": 440
},
"type": "n8n-nodes-base.stickyNote",
"typeVersion": 1,
"position": [
-560,
440
],
"id": "5fea4449-826d-423a-b9fd-f1391239cc12",
"name": "Sticky Note3"
}
],
"connections": {
"When chat message received": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"GPT 4.1-mini": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Web Search": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"Set": {
"main": [
[
{
"node": "Tavily",
"type": "main",
"index": 0
}
]
]
}
},
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "1dcc281e-8df2-47ae-937d-502f4f81b0cc",
"meta": {
"templateCredsSetupCompleted": true
},
"id": "zcj4Dr1xl9x6KAI7",
"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.
httpHeaderAuthopenRouterApiopenWeatherMapApi
Pro
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About this workflow
API Calls in n8n. Uses chatTrigger, agent, lmChatOpenRouter, openWeatherMap. Chat trigger; 12 nodes.
Source: https://github.com/Zie619/n8n-workflows — original creator credit. Request a take-down →
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