Discover / x402.klimalabs.com

x402 Carbon Retirement API

■ Challenge detected

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 retirement costs the credit price plus a fee, sent from your own wallet (prepare/retire) or relayed from a signed USDC authorization (prepare-auth + POST actions/retire). Full spec at /openapi.json.

x402
Base
USDC
Blockchain

Listed price: $0.001
Challenge detected: 9 of the last 9 checks
Median response: 119 ms
Last checked: 16 Oct, 13:59 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://x402.klimalabs.com/api/catalog
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

1 listed endpoints · on x402 Bazaar

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

GEThttps://x402.klimalabs.com/api/catalog$0.001Entry 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 retirement costs the credit price plus a fee, sent from your own wallet (prepare/retire) or relayed from a signed USDC authorization (prepare-auth + POST actions/retire). Full spec at /openapi.json.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 1 of 1 listed endpoints.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/x402.klimalabs.com

Recent checks

28 Sept 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.16 Oct 2026

All 9 checks

When (UTC)	Result	HTTP	Response
16 Oct, 13:59 UTC	Challenge detected	402	78ms
15 Oct, 08:20 UTC	Challenge detected	402	228ms
13 Oct, 20:45 UTC	Challenge detected	402	398ms
11 Oct, 19:34 UTC	Challenge detected	402	222ms
10 Oct, 03:32 UTC	Challenge detected	402	132ms
8 Oct, 21:32 UTC	Challenge detected	402	82ms
7 Oct, 15:42 UTC	Challenge detected	402	78ms
6 Oct, 15:31 UTC	Challenge detected	402	74ms
28 Sept, 05:02 UTC	Challenge detected	402	119ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 16 Oct, 13:59 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What price is recorded for x402 Carbon Retirement API?

Its listed price is $0.001.

What payment terms does x402 Carbon Retirement API advertise?

The listing advertises x402, Base and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is x402 Carbon Retirement API listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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