The LCA data API

LCA data for the tools you build.

Over 2 million life-cycle assessment data points behind one REST & GraphQL API. Search free, pull what you need, pay for what you use.

Request API access Read the docs

2M+

LCA data points

REST + GraphQL

Fully mirrored

Usage-based

Pay per pull

impact.js

// fetch one characterized impact
const base = "https://api.circa.ai/public"
const res = await fetch(
  `${base}/processes/${id}/impacts/${impactId}`,
  { headers: {
    "x-api-key": KEY,
    "x-team-id": teamId,
    "Circa-Version": "2026-05-11.arrakis"
  } }
)
const { value, unit } = await res.json()
// → 5.1020 kg CO2-Eq

Carbon footprint

Steel, chromium 18/8

5.1020 kg CO₂-eq

IPCC 2021 · GWP100

Licensable data

Structured impact data, ready to query.

Process impacts (LCIA)

Characterized impact scores per process, available across every characterization method we license.

EF v3.1IPCC 2021ReCiPe 2016CML v4.8 2016TRACI v2.1

Exchange quantities (LCI)

Inputs and outputs per process — the flows behind any bottom-up inventory.

inputs & outputsfunctional unitflow-level uncertainty

Exchange properties

Physical and economic properties used to customize allocation ratios.

carbon contentmassprice

Usage-based pricing

Pay for the data you pull.

No seats, no all-or-nothing database deal. It scales with your product.

Talk to us

Free search. Browse the full database at no cost.

Per-datapoint pulls. Reveal a single Process LCI or impacts, as-needed.

Annual license. Each datapoint you pull is licensed for one year.

300 req/min per key. Higher limits on request.

Built for integration

Drops into your stack.

REST and GraphQL, fully mirrored

JSON everywhere; the same x-api-key and Circa-Version headers on every endpoint.

Pull on demand

Search the catalog free; reveal a datapoint with one call. Pulled values are yours to cache.

Versioned, with webhooks

Pin behavior to a dated version. Stream events and manage keys from the developer portal.

search-materials.sh

# Search 2M+ datapoints — free
curl -s 'https://api.circa.ai/public/materials?search=steel' \
  -H 'x-api-key: circa_live_xxx' \
  -H 'Circa-Version: 2026-05-11.arrakis'

# → 200 OK
{
  "items": [{
    "name": "steel, chromium 18/8",
    "functionalUnit": "kg",
    "properties": [{
      "name": "carbon content",
      "value": null,   // pull to reveal
      "revealed": false
    }]
  }],
  "total": 12453
}

Get API access

Tell us what you're building. Prefer email? contact@circa.ai.