API · /carbonfootprint-api

Carbon Footprint API

healthy 3,982 Subscribers

Estimate CO2e emissions for everyday activities using the official DEFRA 2023 GHG conversion factors: road and rail travel (per kilometre by vehicle type, split across passengers), flights (by airport IATA pair with great-circle distance, or by distance, across cabin classes and round trips), grid electricity (by kilowatt-hour and country carbon intensity) and direct fuel combustion (by litres and fuel type). A factors endpoint exposes every emission factor, supported vehicle and fuel type, and the country grid-intensity table. Each result returns CO2e in kilograms, tonnes and grams. Every endpoint accepts input via the query string or the request body and returns lean JSON. Pure server-side compute (no third-party upstream), so responses are instant and always available. Ideal for travel and booking flows, sustainability dashboards, ESG and Scope-3 reporting, and carbon-aware product features.

#carbon #co2 #emissions #sustainability #esg #climate #data

api.oanor.com/carbonfootprint-api

Get an API key Try in playground → Contact provider

Machine-readable spec so AI agents can integrate this API.

/api/carbonfootprint-api/openapi.json

/api/carbonfootprint-api/llms.txt

Discovery: GET /api/index.json lists every API.

Carbon Footprint API — live data on the oanor API marketplace

API health

healthy

Uptime: 100.00%; Server probes · 24h
Avg latency: 73 ms; Server probes · 24h
Subscribers: 3,982; active
Total calls: 95; last 7 days

Full status page → · 15 probes/24h

Pricing

Pick a tier — billed monthly, cancel anytime.

Free

22,000 calls / month
3 requests / second
Hard cap (429 above quota, no overage)
22,000 calls/month, 3 req/s
Vehicle, flight, electricity, fuel & factors — CO2e in kg/t/g
No credit card

Basic

€7.50 /month

280,000 calls / month
12 requests / second
Hard cap (429 above quota, no overage)
280,000 requests/month, 12 req/s
All endpoints, airport-pair flight distances, 45 country grids
Commercial use included
Email support

Pro

€23.00 /month

2,200,000 calls / month
40 requests / second
Hard cap (429 above quota, no overage)
2,200,000 requests/month, 40 req/s
High throughput for apps & sustainability dashboards
Priority email support
Commercial use allowed

Mega

€58.00 /month

11,000,000 calls / month
120 requests / second
Hard cap (429 above quota, no overage)
11,000,000 requests/month, 120 req/s
Highest throughput for ESG & Scope-3 batch reporting
Priority support
Commercial use allowed

Built by

PremiumApi

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Carbon API

Live on-chain data for Carbon (chain id carbon-1) — the Switcheo-built Cosmos-SDK Layer-1 for decentralised derivatives and spot trading, whose native token is SWTH — served directly from public LCD/REST nodes with multi-node failover. The status endpoint returns the latest block height and time, chain id, the staking bond denom and the current minting inflation rate. The validators endpoint lists the active bonded validator set ranked by stake, each with its moniker, operator address, self-plus-delegated SWTH, commission rate and jailed flag. The supply endpoint returns the total SWTH supply, the amount bonded in staking and the resulting bonded ratio. The governance endpoint returns the most recent on-chain proposals with their id, title, status and voting window. SWTH uses an 8-decimal base denomination which is converted to whole SWTH with exact big-integer scaling, and every figure is read live from the chain — nothing bundled or modelled — behind a short server-side cache with keep-warm so the feed stays fast and fresh. Ideal for staking dashboards, validator and delegator tooling, explorers, governance trackers and portfolio or analytics apps across the Cosmos and DeFi ecosystem. Live keyless upstream. 5 endpoints.

api.oanor.com/carbon-api

Aquascape API

Planted-aquarium and aquascaping maths as an API, computed locally and deterministically — the dosing and water numbers a high-tech planted tank runs on, not the rolls of a dice. The co2 endpoint gives the dissolved CO2 concentration from pH and carbonate hardness using the classic relationship CO2 (ppm) ≈ 3 × KH (dKH) × 10^(7 − pH), and flags it against the 15–30 ppm window plants want — at pH 6.6 and KH 4 you are at about 30 ppm, the top of the safe zone, while pH 7.0 and KH 3 is a carbon-limited 9 ppm. The fertilizer endpoint turns a dry-salt dose into the nutrient ppm it adds, the heart of Estimative Index dosing: ppm = grams × the nutrient mass fraction × 1000 ÷ tank litres, so 1 g of KNO3 in 100 litres adds 6.1 ppm nitrate and 3.9 ppm potassium, and it knows KNO3, KH2PO4, K2SO4, MgSO4 (Epsom) and Ca(NO3)2. The substrate endpoint sizes the substrate from the footprint and target depth — a 60 × 30 cm tank at 6 cm deep needs 10.8 litres, two 9-litre aquasoil bags. Everything is computed locally and deterministically, so it is instant and private. Ideal for aquascaping and planted-tank apps, fertiliser-dosing calculators, CO2-rig tools, and aquarium-shop and hobby sites. Pure local computation — no key, no third-party service, instant. Live, nothing stored. 3 compute endpoints. For a tank water volume or fish stocking use an aquarium API; for pool chemistry use a pool API.

api.oanor.com/aquascape-api

Greenhouse Gas Emissions API

Independent greenhouse-gas emissions data as an API — powered by Climate TRACE, the coalition (backed by Al Gore) that monitors global emissions from satellites, sensors and AI rather than self-reported figures. Get any country's emissions for a given year — CO2, methane (CH4) and nitrous oxide (N2O) in tonnes, plus CO2-equivalent over 100- and 20-year horizons — together with the country's global emissions rank and its share of total world emissions; pass several countries at once to compare them side by side. List the full set of sectors, subsectors and gases that Climate TRACE tracks (power, transportation, manufacturing, agriculture, fossil-fuel operations, waste and more). From China and the United States to any nation on Earth, with data from 2015 onward, it is ideal for climate, ESG, sustainability, policy, journalism and research applications. An independent emissions-inventory data source — distinct from electricity-grid carbon intensity, activity footprint calculators and climate classification. Open data from Climate TRACE (CC BY 4.0).

api.oanor.com/climatetrace-api

Token Unlocks & Vesting API

When locked crypto tokens vest into circulation, who they go to, and how much supply is still to come — live from DeFiLlama's open emissions dataset, no key. A token's price tells you what it costs today; its unlock schedule tells you the supply pressure ahead, the single biggest and most predictable overhang in crypto. When a large tranche of insider, private-sale or team tokens vests, it is fresh sell-side supply hitting a fixed amount of demand — and these dates are known in advance. A static "percent unlocked" number (which dilution APIs give) is only a snapshot; what a trader needs is the calendar: when is the next cliff, how many tokens, what share of total supply, and to whom. The protocols endpoint lists every token DeFiLlama tracks a schedule for (searchable). The next endpoint is the trading signal — the next upcoming cliff unlock for a token: its date, days away, token amount, the share of total supply it dilutes, the unlock type and the recipients (insiders, private sale, team, ecosystem), plus the unlocks after it. The schedule endpoint returns the fuller picture: total and max supply, the allocation by category with how much of each is already unlocked, the count of past and future events, the tokens still locked, and the upcoming events. The token-unlock / vesting-schedule cut — distinct from the tokenomics-and-dilution APIs (which give the static supply and FDV snapshot, not the dated unlock calendar) and from price and market-cap APIs. Amounts are in tokens and as a share of total supply; pair with any price API for the dollar value.

api.oanor.com/tokenunlocks-api

Frequently asked questions

Quick answers about pricing, quotas, and integration.

How do I get an API key for Carbon Footprint API?

Sign up for free at oanor.com, generate an API key from the developer dashboard, and call Carbon Footprint API with the x-oanor-key header. No credit card needed for the free tier.

What's the rate limit for Carbon Footprint API?

Free tier allows 1 request per second. Paid plans scale up to 50 requests per second on the Mega tier. Hard limits return HTTP 429 above the quota — no surprise overage charges.

How much does Carbon Footprint API cost?

Carbon Footprint API has a free tier with 100 calls / month. Paid plans start at €7.50 / month with higher quotas and faster rate limits.

Can I cancel my subscription anytime?

Yes. Plans are billed monthly and you can cancel anytime from your billing dashboard. No long-term contracts and no cancellation fee.

Is Carbon Footprint API GDPR-compliant?

All requests to Carbon Footprint API go through our EU-based gateway. Your upstream API key never leaves our server and no personal data is shared with the upstream provider beyond the request you send.

Carbon 5

Pick an endpoint from the list on the left to see its details and try it.

GET /v1/electricity

Grid electricity emissions

Playground

Parameters

Custom headers

Language: Client:

GET /v1/factors

All emission factors & options

Playground

Custom headers

Language: Client:

GET /v1/flight

Air travel emissions

Playground

Parameters

Custom headers

Language: Client:

GET /v1/fuel

Fuel combustion emissions

Playground

Parameters

Custom headers

Language: Client:

GET /v1/vehicle

Road/rail travel emissions

Playground

Parameters

Custom headers

Language: Client:

Code snippets

curl https://api.oanor.com/carbonfootprint-api/SOME_PATH \
  -H "x-oanor-key: oanor_test_..."

const res = await fetch("https://api.oanor.com/carbonfootprint-api/SOME_PATH", {
  headers: { "x-oanor-key": "oanor_test_..." }
});
const data = await res.json();

$ch = curl_init("https://api.oanor.com/carbonfootprint-api/SOME_PATH");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
$response = curl_exec($ch);

import requests
r = requests.get(
    "https://api.oanor.com/carbonfootprint-api/SOME_PATH",
    headers={"x-oanor-key": "oanor_test_..."},
)
print(r.json())

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Carbon Footprint API

API health

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Related APIs

Carbon API

Aquascape API

Greenhouse Gas Emissions API

Token Unlocks & Vesting API

Frequently asked questions

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