Offset your emissions from your own systems
Top up a prepaid balance, then buy carbon credits by kg or by amount with one API call. Every purchase gets a public certificate.
For businesses that offset their own emissions. We review each request.
curl https://trimcarbon.com/api/v1/offsets \
-H "Authorization: Bearer tc_live_…" \
-H "Idempotency-Key: 7f8d0c6e-2b1a-4e9f" \
-H "Content-Type: application/json" \
-d '{"kg": 1000}'{
"object": "offset",
"id": "off_8Hq2kP0aZr4mXc1vB7nT3yLw",
"status": "processing",
"kg": 1000,
"amount_cents": 4000,
"currency": "usd"
}How it works
- 01
Request access
Tell us about your company and what you will offset. We approve business accounts.
- 02
Top up
Add a prepaid balance through Stripe, from $250, with an invoice for each top-up.
- 03
Buy by API
Send kg, or an amount to spend. The cost comes out of your balance at your rate.
- 04
Get a certificate
We buy the credits right away. A public certificate follows once they are retired.
Built for automation
By volume or by price
Ask for 1,000 kg, or for what $50 buys. A quote gives you the cost before you buy.
Safe retries
Each purchase carries an Idempotency-Key, so a retry never buys twice.
Test keys
Build against a simulated balance. Nothing is charged or retired.
Read-only keys
Give dashboards and reports a key that can read but not buy.
Public certificates
Each purchase links to its certificate in our registry, with the projects behind it.
Balance alerts
Set a threshold and get an email before the balance runs out.
Pricing
$0.04
per kg of CO₂
$40 a tonne, paid from a prepaid balance. Top-ups from $250, and no subscription.
Offsetting more than 15 tonnes a year? Ask us for a volume rate. Contact us
Start with a test key
Request access, build against test mode, and go live when you are ready.