Discover / x402-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app

Klima Retirement Aggregator

■ Challenge detected

Live snapshot of the most liquid carbon credits retirable on Base: the top 3 Klima Protocol carbon classes and the top 3 Carbonmark marketplace listings, with USDC-per-tonne prices and tonnes available. Additionally, the additional endpoints to quote and retire carbon are included; query those endpoints for further discovery, quotes, and retirements. Query /.well-known, /openapi, and /discover to get started.

x402
Base
USDC

Listed price: $0.001
Challenge detected: 9 of the last 9 checks
Median response: 99 ms
Last checked: 16 Oct, 13:59 UTC
In our index since: 26 Sept 2026

Endpoint

curl -i https://x402-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app/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-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app/api/catalog$0.001Live snapshot of the most liquid carbon credits retirable on Base: the top 3 Klima Protocol carbon classes and the top 3 Carbonmark marketplace listings, with USDC-per-tonne prices and tonnes available. Additionally, the additional endpoints to quote and retire carbon are included; query those endpoints for further discovery, quotes, and retirements. Query /.well-known, /openapi, and /discover to get started.

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-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app

Recent checks

2 Oct 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	56ms
15 Oct, 04:47 UTC	Challenge detected	402	266ms
13 Oct, 20:45 UTC	Challenge detected	402	172ms
11 Oct, 19:34 UTC	Challenge detected	402	99ms
10 Oct, 03:32 UTC	Challenge detected	402	65ms
9 Oct, 00:47 UTC	Challenge detected	402	211ms
7 Oct, 21:31 UTC	Challenge detected	402	159ms
6 Oct, 21:30 UTC	Challenge detected	402	71ms
2 Oct, 05:04 UTC	Challenge detected	402	63ms

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 Klima Retirement Aggregator?

Its listed price is $0.001.

What payment terms does Klima Retirement Aggregator 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 Klima Retirement Aggregator listed?

In x402 Bazaar. Superstables first indexed it on 26 Sept 2026.

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