Carbon Interface API

www.carboninterface.com · Science

Science Bearer Token Free Tier Environment Carbon Climate

Carbon emissions estimates for flights, vehicles, shipping, electricity, and fuel. Calculate your carbon footprint programmatically. Free tier: 10 requests/month.

Authentication

Bearer Token Free API key at carboninterface.com. Pass as Authorization: Bearer YOUR_KEY.

Sample Requests

POST Flight emissions

Calculate CO2 emissions for 2 passengers flying JFK→LHR.

https://www.carboninterface.com/api/v1/estimates

Hover any highlighted part to learn what it does

Headers — extra info sent with the request

Content-Type	application/json
Authorization	Bearer YOUR_KEY

Request Body — data you're sending

{
  "legs": [
    {
      "departure_airport": "JFK",
      "destination_airport": "LHR"
    }
  ],
  "type": "flight",
  "passengers": 2
}

curl -X POST "https://www.carboninterface.com/api/v1/estimates" \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"legs":[{"departure_airport":"JFK","destination_airport":"LHR"}],"type":"flight","passengers":2}'

import requests
headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer YOUR_ACCESS_TOKEN"
}
data = {
    "legs": [
        {
            "departure_airport": "JFK",
            "destination_airport": "LHR"
        }
    ],
    "type": "flight",
    "passengers": 2
}
response = requests.post(
    "https://www.carboninterface.com/api/v1/estimates",
    headers=headers,
    json=data,
)
print(response.json())

const url = 'https://www.carboninterface.com/api/v1/estimates';

const response = await fetch(url, {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Authorization': 'Bearer YOUR_ACCESS_TOKEN'
  },
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
  "legs": [
    {
      "departure_airport": "JFK",
      "destination_airport": "LHR"
    }
  ],
  "type": "flight",
  "passengers": 2
}),
}); 
const data = await response.json();
console.log(data);

package main

import (
	"fmt"
	"io"
	"net/http"
	"bytes"
	"encoding/json"
)

func main() {
	targetURL := "https://www.carboninterface.com/api/v1/estimates"
	jsonData, _ := json.Marshal({"legs":[{"departure_airport":"JFK","destination_airport":"LHR"}],"type":"flight","passengers":2})
	req, _ := http.NewRequest("POST", targetURL, bytes.NewBuffer(jsonData))
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("Authorization", "Bearer YOUR_ACCESS_TOKEN")
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{}
	resp, _ := client.Do(req)
	defer resp.Body.Close()
	body, _ := io.ReadAll(resp.Body)
	fmt.Println(string(body))
}

require "net/http"
require "json"

uri = URI("https://www.carboninterface.com/api/v1/estimates")

http = Net::HTTP.new(uri.host, uri.port)
http.use_ssl = uri.scheme == "https"

req = Net::HTTP::Post.new(uri)
req["Content-Type"] = "application/json"
req["Authorization"] = "Bearer YOUR_ACCESS_TOKEN"
req["Content-Type"] = "application/json"
req.body = "{\"legs\":[{\"departure_airport\":\"JFK\",\"destination_airport\":\"LHR\"}],\"type\":\"flight\",\"passengers\":2}"

res = http.request(req)
puts JSON.parse(res.body)

<?php
$url = "https://www.carboninterface.com/api/v1/estimates";
$opts = ["http" => [
    "method" => "POST",
    "header" => implode("\r\n", [
        "Content-Type: application/json",
        "Authorization: Bearer YOUR_ACCESS_TOKEN",
        "Content-Type: application/json"
    ]),
    "content" => json_encode({"legs":[{"departure_airport":"JFK","destination_airport":"LHR"}],"type":"flight","passengers":2}),
]];
$ctx = stream_context_create($opts);
$res = file_get_contents($url, false, $ctx);
print_r(json_decode($res, true));

Postman Setup Guide

Get Postman ↗

Get a free API key at carboninterface.com
Set Authorization: Bearer YOUR_KEY
POST /estimates with type: flight, vehicle, shipping, electricity, or fuel
Flight: type=flight, departure_airport, destination_airport, passengers
Vehicle: type=vehicle, distance_unit=km, distance_value=100, vehicle_model_id

Open documentation ↗