Klima Retirement Aggregator
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.
TradingLiveeip155:8453Exactvia cdp
CarbonClimateBase
Calls · 30d
1
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far.
$0.001
Verified settled volume
1 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-15 17:12Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x6ada131794388B83c2b3e5b8A24A4677b3aD2E39The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
Provider
The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.
Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
0.001USDC≈ $0.001 USD
on Base · exact scheme
Pay 0.001 USDC on Base to 0x6ada…D2E39. The signed payment is good for 5 minutes.
- Paid to
- 0x6ada…D2E39
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0x6ada131794388B83c2b3e5b8A24A4677b3aD2E39",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"asOf": "2026-09-15T00:00:00.000Z",
"note": "Prices are USDC per tonne before the on-chain protocol fee. Class prices are indicative live quotes; listing prices are the seller's firm ask. To retire: GET quote, then either GET prepare/retire and send the transactions from your own wallet, or GET prepare-auth, sign its typedData and POST actions/retire. None of those charge an API fee. GET discover returns the full catalog for free.",
"classes": [],
"listings": [],
"endpoints": {
"quote": "https://x402.klimalabs.com/api/quote",
"openapi": "https://x402.klimalabs.com/openapi.json",
"discover": "https://x402.klimalabs.com/api/discover",
"certificate": "https://x402.klimalabs.com/api/certificate",
"prepareAuth": "https://x402.klimalabs.com/api/prepare-auth",
"actionsRetire": "https://x402.klimalabs.com/api/actions/retire",
"prepareRetire": "https://x402.klimalabs.com/api/prepare/retire"
}
}
}
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"input"
],
"properties": {
"input": {
"type": "object",
"required": [
"type",
"method"
],
"properties": {
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {},
"additionalProperties": false
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"asOf",
"classes",
"listings",
"endpoints",
"note"
],
"properties": {
"asOf": {
"type": "string"
},
"note": {
"type": "string"
},
"classes": {
"type": "array",
"items": {
"type": "object",
"required": [
"carbonClassId",
"name",
"category",
"country",
"priceUsdcPerTonne",
"priceUsdcPerTonneFormatted",
"priceBasis",
"liquidityTonnes",
"creditCount"
],
"properties": {
"name": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"country": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"category": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"priceBasis": {
"type": "string",
"const": "indicative"
},
"creditCount": {
"type": "number"
},
"carbonClassId": {
"type": "string"
},
"liquidityTonnes": {
"type": "string"
},
"priceUsdcPerTonne": {
"type": "string"
},
"priceUsdcPerTonneFormatted": {
"type": "string"
}
},
"additionalProperties": false
}
},
"listings": {
"type": "array",
"items": {
"type": "object",
"required": [
"listingId",
"projectName",
"creditId",
"registry",
"vintage",
"country",
"category",
"priceUsdcPerTonne",
"priceUsdcPerTonneFormatted",
"priceBasis",
"leftToSellTonnes",
"minFillTonnes",
"expiresAt"
],
"properties": {
"country": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"vintage": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
},
"category": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"creditId": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"registry": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"expiresAt": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"listingId": {
"type": "string"
},
"priceBasis": {
"type": "string",
"const": "firm"
},
"projectName": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"minFillTonnes": {
"type": "string"
},
"leftToSellTonnes": {
"type": "string"
},
"priceUsdcPerTonne": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"priceUsdcPerTonneFormatted": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
}
},
"additionalProperties": false
}
},
"endpoints": {
"type": "object",
"required": [
"discover",
"quote",
"prepareRetire",
"prepareAuth",
"actionsRetire",
"certificate",
"openapi"
],
"properties": {
"quote": {
"type": "string"
},
"openapi": {
"type": "string"
},
"discover": {
"type": "string"
},
"certificate": {
"type": "string"
},
"prepareAuth": {
"type": "string"
},
"actionsRetire": {
"type": "string"
},
"prepareRetire": {
"type": "string"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-15 17:12Z
- Last indexed by Roundhouse
- 2026-09-25 10:20Z
- Last enriched (probe, favicon, geo)
- 2026-09-17 10:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
Hand this page to an agent
Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.
GET api.roundhouseai.io/v0/endpoints
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 10 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service Klima Retirement Aggregator and tell me whether it is worth paying: what a call costs, whether the endpoint answered when last probed, and what its payment record actually shows. curl -s 'https://api.roundhouseai.io/v0/endpoints?q=Klima%20Retirement%20Aggregator' curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>' Then call it: read the price from the live 402 at https://x402-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app/api/catalog, never from a cached figure, and pay with an x402 client. The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except /v0/unified* and /v0/endpoints. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402, or use an organization key from https://roundhouseai.io/dashboard/team. If you do not have Roundhouse tools or skills installed, read https://roundhouseai.io/skill.md first — it is the whole procedure.