Samir Saci This workflow corresponds to n8n.io template #4757 — we link there as the canonical source.
This workflow follows the Agent → Gmail 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 →
{
"id": "umOZqpde6cAUTL8F",
"meta": {
"templateCredsSetupCompleted": true
},
"name": "\ud83d\ude9a CO2 Emissions of Freight Shipments with Carbon Interface API and GPT-4o",
"tags": [],
"nodes": [
{
"id": "dc20a34f-90ff-4f4e-a2f7-7b77abb92f4c",
"name": "Gmail Trigger",
"type": "n8n-nodes-base.gmailTrigger",
"position": [
-320,
415
],
"parameters": {
"simple": false,
"filters": {},
"options": {
"downloadAttachments": false
},
"pollTimes": {
"item": [
{
"mode": "everyMinute"
}
]
}
},
"credentials": {
"gmailOAuth2": {
"name": "<your credential>"
}
},
"notesInFlow": true,
"typeVersion": 1.2
},
{
"id": "984a0707-919c-4c67-b070-6b1caaea2946",
"name": "Structured Output Parser",
"type": "@n8n/n8n-nodes-langchain.outputParserStructured",
"position": [
140,
600
],
"parameters": {
"jsonSchemaExample": "{\n \"shipment_number\": \"7894-PCB-654\",\n \"pickup_location\": \"Centre de Distribution Auchan\",\n \"pickup_address\": \"77 Rue Albert Garry, 94450 Limeil-Br\u00e9vannes\",\n \"expected_pickup_time\": \"2024-09-24T09:00:00\",\n \"temperature_control\": \"Frozen\",\n \"destination_store_name\": \"Auchan Store 124\",\n \"destination_address\": \"43-45 Quai Jules Guesde, 94405 Vitry-sur-Seine\",\n \"expected_delivery_time\": \"2024-09-24T18:00:00\",\n \"driving_distance_km\": 9.61,\n \"estimated_transit_min\": 16.9,\n \"cargo_quantity\": 12,\n \"cargo_weight_tons\": 2.79\n}\n"
},
"typeVersion": 1.2
},
{
"id": "de58b711-25ef-42f7-a5ab-4bc1d20fd1fc",
"name": "AI Agent Parser",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
-100,
415
],
"parameters": {
"text": "=Extract the structured shipment details from the following email:\n\n{{ $json.text }}\n",
"options": {
"systemMessage": "=You are a logistics assistant. When provided with the body of a shipment confirmation email, extract the following structured JSON object:\n\n{\n \"shipment_number\": string,\n \"pickup_location\": string,\n \"pickup_address\": string,\n \"expected_pickup_time\": string (ISO 8601, e.g. \"2024-09-24T09:00:00\"),\n \"temperature_control\": string,\n \"destination_store_name\": string,\n \"destination_address\": string,\n \"expected_delivery_time\": string (ISO 8601, e.g. \"2024-09-24T18:00:00\"),\n \"driving_distance_km\": number,\n \"estimated_transit_min\": number,\n \"cargo_quantity\": number,\n \"cargo_weight_tons\": number\n}\n\n- Extract **only** what\u2019s listed.\n- Normalize dates and times to ISO 8601 format.\n- Remove units from numbers (e.g. 9.61 km \u2192 9.61, 2.79 tons \u2192 2.79).\n- Return only the JSON object. No additional explanation or text."
},
"promptType": "define",
"hasOutputParser": true
},
"typeVersion": 1.9
},
{
"id": "05ca643f-774c-40a5-843f-76790c42d433",
"name": "OpenAI Chat Model2",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-100,
620
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"name": "<your credential>"
}
},
"typeVersion": 1.2
},
{
"id": "fb16f384-e73f-4c3f-be72-24fede7b2760",
"name": "Collect CO2 Emissions",
"type": "n8n-nodes-base.httpRequest",
"position": [
680,
420
],
"parameters": {
"url": "https://www.carboninterface.com/api/v1/estimates",
"method": "POST",
"options": {},
"jsonBody": "={\n \"type\": \"shipping\",\n \"weight_value\": {{ $('AI Agent Parser').item.json.output.cargo_weight_tons * 1000000 }},\n \"weight_unit\": \"g\",\n \"distance_value\": {{ $('AI Agent Parser').item.json.output.driving_distance_km }},\n \"distance_unit\": \"km\",\n \"transport_method\": \"truck\"\n}\n",
"sendBody": true,
"sendHeaders": true,
"specifyBody": "json",
"headerParameters": {
"parameters": [
{
"name": "Authorization",
"value": "Bearer YOUR_TOKEN_HERE"
},
{
"name": "Content-Type",
"value": "application/json"
}
]
}
},
"notesInFlow": true,
"typeVersion": 4.2
},
{
"id": "82c2db80-9a3a-421b-ad27-097a713fc3c2",
"name": "Load Results",
"type": "n8n-nodes-base.googleSheets",
"position": [
920,
420
],
"parameters": {
"columns": {
"value": {
"co2_kg": "={{ $json.data.attributes.carbon_kg }}",
"shipment_number": "={{ $('AI Agent Parser').item.json.output.shipment_number }}",
"co2_estimation_time": "={{ $json.data.attributes.estimated_at }}"
},
"schema": [
{
"id": "shipment_number",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "shipment_number",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "pickup_location",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "pickup_location",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "pickup_address",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "pickup_address",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "expected_pickup_time",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "expected_pickup_time",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "temperature_control",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "temperature_control",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "destination_store_name",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "destination_store_name",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "destination_address",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "destination_address",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "expected_delivery_time",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "expected_delivery_time",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "driving_distance_km",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "driving_distance_km",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "estimated_transit_min",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "estimated_transit_min",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "cargo_quantity",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "cargo_quantity",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "cargo_weight_tons",
"type": "string",
"display": true,
"removed": true,
"required": false,
"displayName": "cargo_weight_tons",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "co2_kg",
"type": "string",
"display": true,
"required": false,
"displayName": "co2_kg",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "co2_estimation_time",
"type": "string",
"display": true,
"required": false,
"displayName": "co2_estimation_time",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [
"shipment_number"
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "appendOrUpdate",
"sheetName": {
"__rl": true,
"mode": "list",
"value": 877993777,
"cachedResultUrl": "",
"cachedResultName": "CO2 emissions"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "1NLNviRoVMEj2z78KiueruB5sd2CnvAb80DS7J2melVs",
"cachedResultUrl": "",
"cachedResultName": "Open Route Service"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"notesInFlow": true,
"typeVersion": 4.6
},
{
"id": "94cd225d-1bc0-42b5-a466-7fad8b445e94",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-360,
-60
],
"parameters": {
"color": 7,
"width": 180,
"height": 820,
"content": "### 1. Workflow Trigger with Gmail Trigger\nThe workflow is triggered by a new email received in your Gmail mailbox dedicated to process **shipment records**.\n\n#### How to setup?\n- **Gmail Trigger Node:** set up your Gmail API credentials\n[Learn more about the Gmail Trigger Node](https://docs.n8n.io/integrations/builtin/trigger-nodes/n8n-nodes-base.gmailtrigger)\n"
},
"typeVersion": 1
},
{
"id": "3e4989f9-2ef4-4c60-98cc-d8b988162e54",
"name": "Sticky Note2",
"type": "n8n-nodes-base.stickyNote",
"position": [
-160,
-60
],
"parameters": {
"color": 7,
"width": 440,
"height": 820,
"content": "### 2. AI Agent to trip schedule report\nThis node will analyze the content of an email to extract structured information about a **shipment**, including **pickup/delivery times**, **addresses**, **cargo weight**, and **driving distance**.\n\n#### How to setup?\n- **AI Agent with the Chat Model**:\n 1. Add a **chat model** with the required credentials *(Example: Open AI 4o-mini)*\n 2. Adapt the system prompt to the format of emails you expect to receive *(type of information included)*\n [Learn more about the AI Agent Node](https://docs.n8n.io/integrations/builtin/cluster-nodes/root-nodes/n8n-nodes-langchain.agent)\n"
},
"typeVersion": 1
},
{
"id": "7dc4dab6-2536-4373-b058-7487fc968c33",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
300,
-60
],
"parameters": {
"color": 7,
"width": 1180,
"height": 820,
"content": "### 3. Record Shipment Request Information and fetch emissions using the Carbon Interface API \nThis starts by recording all the structured shipment information parsed by the AI Agent node. Then, we use the **Carbon Interface API** to estimate **CO\u2082 emissions** based on cargo weight, distance, and transportation method.\n\n#### How to setup?\n\n- **Setup Carbon Interface API Credentials** \n 1. Get your free API key: [Carbon Interface API Documentation](https://docs.carboninterface.com/#/) \n 2. Fill the API key in the HTTP Request node headers (`Bearer YOUR_TOKEN_HERE`)\n\n- **Load records into the Google Sheet Node** \n 1. Add your Google Sheets API credentials to access your sheet \n 2. Select the file using the list, a URL, or its ID \n 3. Select the sheet where you want to log your shipping emissions \n 4. Map the fields: \n **shipment_number**, **pickup_location**, **pickup_address**, **expected_pickup_time**, **temperature_control**, **destination_store_name**, **destination_address**, **expected_delivery_time**, **driving_distance_km**, **estimated_transit_min**, **cargo_quantity**, **cargo_weight_tons**, **weight_value_g**, **co2_kg**, **co2_estimation_time**\n\n> Distance and weight values will be used to calculate carbon emissions via the Carbon Interface API.\n\n"
},
"typeVersion": 1
},
{
"id": "a51645cd-d3fe-4c3f-a7af-9bdd31eb9242",
"name": "Record Shipment Information",
"type": "n8n-nodes-base.googleSheets",
"position": [
420,
420
],
"parameters": {
"columns": {
"value": {
"cargo_quantity": "={{ $json.output.cargo_quantity }}",
"pickup_address": "={{ $json.output.pickup_address }}",
"pickup_location": "={{ $json.output.pickup_location }}",
"shipment_number": "={{ $json.output.shipment_number }}",
"cargo_weight_tons": "={{ $json.output.cargo_weight_tons }}",
"destination_address": "={{ $json.output.destination_address }}",
"driving_distance_km": "={{ $json.output.driving_distance_km }}",
"temperature_control": "={{ $json.output.temperature_control }}",
"expected_pickup_time": "={{ $json.output.expected_pickup_time }}",
"estimated_transit_min": "={{ $json.output.estimated_transit_min }}",
"destination_store_name": "={{ $json.output.destination_store_name }}",
"expected_delivery_time": "={{ $json.output.expected_delivery_time }}"
},
"schema": [
{
"id": "shipment_number",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "shipment_number",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "pickup_location",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "pickup_location",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "pickup_address",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "pickup_address",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "expected_pickup_time",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "expected_pickup_time",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "temperature_control",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "temperature_control",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "destination_store_name",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "destination_store_name",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "destination_address",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "destination_address",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "expected_delivery_time",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "expected_delivery_time",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "driving_distance_km",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "driving_distance_km",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "estimated_transit_min",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "estimated_transit_min",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "cargo_quantity",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "cargo_quantity",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "cargo_weight_tons",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "cargo_weight_tons",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "co2_kg",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "co2_kg",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "co2_estimation_time",
"type": "string",
"display": true,
"removed": false,
"required": false,
"displayName": "co2_estimation_time",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [
"shipment_number"
],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "appendOrUpdate",
"sheetName": {
"__rl": true,
"mode": "list",
"value": 877993777,
"cachedResultUrl": "",
"cachedResultName": "CO2 emissions"
},
"documentId": {
"__rl": true,
"mode": "list",
"value": "",
"cachedResultUrl": "",
"cachedResultName": "Open Route Service"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"name": "<your credential>"
}
},
"notesInFlow": true,
"typeVersion": 4.6
}
],
"active": false,
"settings": {
"executionOrder": "v1"
},
"versionId": "844e09c0-2706-43da-bd53-6c211b68aafc",
"connections": {
"Load Results": {
"main": [
[]
]
},
"Gmail Trigger": {
"main": [
[
{
"node": "AI Agent Parser",
"type": "main",
"index": 0
}
]
]
},
"AI Agent Parser": {
"main": [
[
{
"node": "Record Shipment Information",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model2": {
"ai_languageModel": [
[
{
"node": "AI Agent Parser",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Collect CO2 Emissions": {
"main": [
[
{
"node": "Load Results",
"type": "main",
"index": 0
}
]
]
},
"Structured Output Parser": {
"ai_outputParser": [
[
{
"node": "AI Agent Parser",
"type": "ai_outputParser",
"index": 0
}
]
]
},
"Record Shipment Information": {
"main": [
[
{
"node": "Collect CO2 Emissions",
"type": "main",
"index": 0
}
]
]
}
}
}
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.
gmailOAuth2googleSheetsOAuth2ApiopenAiApi
Pro
For the full experience including quality scoring and batch install features for each workflow upgrade to Pro
About this workflow
*Tags: Sustainability, Supply Chain, AI Agent, CO2 Emissions, Carbon Interface API, Logistics, Automation*
Source: https://n8n.io/workflows/4757/ — original creator credit. Request a take-down →
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