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.
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.
Four steps to
carbon neutral.
Get API credentials
Contact us for a sandbox API key. Test your integration end-to-end before going live.
Submit a retirement
Send the amount of CO₂e, your customer's name, and an optional beneficiary reference. We do the rest.
Credits are retired
We source verified credits and permanently retire them on the registry. A certificate and verification URL are generated automatically.
Receive confirmation
Get a webhook with serial numbers, registry details, and a downloadable PDF certificate. White labelling available.
// 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": "GBP", "beneficiary": { "name": "Acme Corp", "country": "GB", "reference": "customer_12345" }, "callback_url": "https://your-app.com/webhooks/carboncert" }'
{
"id": "cc_ret_a1b2c3d4e5f6",
"status": "pending",
"amount_kg": 500,
"beneficiary": {
"name": "Acme Corp"
},
"estimated_completion": "2026-05-01T13:00:00Z",
"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.
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.
CC-1-5.00
Credits verified & retired on
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.