x402 Carbon Retirement API
Entry point to the x402 Carbon Retirement API on Base. Returns every endpoint you need plus a live snapshot of the top 3 carbon classes and marketplace listings by liquidity. Discover, quote and certificate are free. Retiring is paid: each
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 307 ms
- Price
- $0.001 per call
- Paying buyers, last 30 days
- 7 (directory's own records)
- Paid calls, last 30 days
- 47
- Category
- DNS and domains
- Address
- https://x402.klimalabs.com/api/catalog
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/71f711b1c7f7.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).