API for Platforms

Retire carbon credits
on behalf of your customers

Integrate verified carbon retirement directly into your product. One API call to offset emissions, backed by registry-grade credits from Verra, Gold Standard, and UNFCCC.

Get API Access → How It Works

Everything you need to offset at scale

CarbonCert handles the complexity of carbon credit sourcing, registry retirement, and compliance documentation — so you don't have to.

Single API Call

Submit a retirement request with the tonnage and beneficiary. We source credits, retire them on the registry, and return a verification ID.

Registry-Backed

Every credit is sourced from projects certified by Verra (VCS), Gold Standard, or UNFCCC CDM. Serial numbers and retirement records are fully traceable.

PDF Certificates

Each retirement generates a downloadable certificate with project details, serial numbers, and a unique public verification URL your customers can share.

Webhooks

Receive real-time status updates as retirements progress from pending through to confirmed. HMAC-signed for security with automatic retries.

Automated Billing

We handle invoicing and payment collection automatically. Retire credits on demand and receive a consolidated weekly invoice with full line-item detail.

Sandbox & Production

Test your full integration in sandbox mode with simulated retirements before going live. Same API, same responses — no real credits consumed.

How It Works

Four steps to carbon neutral

1

Get API credentials

Contact us for a sandbox API key. Test your integration end-to-end before going live.

2

Submit a retirement

Send the amount of CO₂e (in kg or tonnes), your customer's name, and an optional beneficiary reference. We do the rest.

3

Credits are retired

CarbonCert sources verified credits and permanently retires them on the registry. A certificate and verification URL are generated automatically.

4

Receive confirmation

Get a webhook notification with serial numbers, registry details, and a downloadable PDF certificate to share with your customer. White labelling available.

POST /api/v1/retirements 
// Submit a retirement request
curl -X POST https://carboncert.com/api/v1/retirements \
  -H "Authorization: Bearer cc_live_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{
    "amount_kg": 500,
    "currency": "USD",
    "beneficiary": {
      "name": "Acme Corp",
      "country": "US",
      "reference": "customer_12345"
    },
    "callback_url": "https://your-app.com/webhooks/carboncert"
  }'
Response · 201 Created 
{
  "id": "cc_ret_a1b2c3d4e5f6",
  "status": "pending",
  "amount_kg": 500,
  "beneficiary": {
    "name": "Acme Corp"
  },
  "estimated_completion": "2026-02-22T13:00:00Z",
  "verification_url": "https://carboncert.com/verify/cc_ret_a1b2c3d4e5f6",
  "certificate_url": null  // Available once confirmed
}

Built for platforms

Whether you're building a logistics platform, a SaaS product, or an ecommerce checkout — CarbonCert plugs in wherever your customers need carbon neutrality.

🚛

Logistics & Shipping

Offset freight emissions per shipment. Show customers a verified retirement certificate at delivery.

🛒

Ecommerce

Add a carbon-neutral option at checkout. Retire credits per order and generate customer-facing proof.

⚡

SaaS & Carbon APIs

Pair your emissions calculation with verified retirement. Give users a complete calculate-and-offset experience.

✈️

Travel & Events

Offset flights, conferences, and accommodation. Provide attendees with individual retirement certificates.

🏦

Financial Services

Integrate carbon offsetting into banking apps. Let customers round up transactions to fund verified retirements.

Verification

Every credit is traceable

CarbonCert doesn't just retire credits — we make every retirement independently verifiable. Each offset receives a unique public ID linked to the source registry, project details, and serial numbers.

✓
Verra — Verified Carbon Standard (VCS), the world's most widely used carbon crediting programme.
✓
Gold Standard — Founded by WWF, with rigorous sustainable development co-benefits requirements.
✓
UNFCCC — Clean Development Mechanism (CDM), backed by the United Nations Framework Convention on Climate Change.
Public Verification Page
5.0 tonnes CO₂e
Status ● Confirmed
Registry Verra (VCS)
Project Amazon Rainforest REDD+
Serial CC-1-5.00
Retired February 21, 2026
cc_ret_a1b2c3d4e5f6
Registry-Backed Credits
Permanent Retirement
Public Verification
HMAC-Signed Webhooks
Idempotent Requests
Sandbox Testing

Ready to integrate?

Pricing is based on volume and use case. Get in touch and we'll set you up with sandbox access and a tailored plan.

Contact Us for API Access →

Typically live within 48 hours · Sandbox access included · No commitment required