← The evidence ledger
Evidence row 1037781
Observed , by sync.x402_bazaar/1.
- Kind
- listing
- About
- source_record x402_bazaar:https://x402-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app/api/catalog
- Recorded
- Previous row
- #125416
- Body SHA-256
- ec7c34df57d4769829cb36461d4559a615d103fef5588d957962de3f062f8a24
- Leaf
- 0x9c9ea90aa5b0fed3643e52ba89d01d4e82fc09c3497b25fb22f2ec1e26915f1c
What was observed
{
"endpoints": [
[
"x402",
"https://x402-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app/api/catalog"
]
],
"name": "Klima Retirement Aggregator",
"owner_address": "0xf624f9fe1d3165c5ca32c7fbdbf82f4a5b1d2d0e",
"raw": {
"accepts": [
{
"amount": "1000",
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"maxTimeoutSeconds": 300,
"network": "eip155:8453",
"payTo": "0xf624f9Fe1D3165c5Ca32c7Fbdbf82f4a5b1D2d0e",
"scheme": "exact"
}
],
"description": "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.",
"extensions": {
"bazaar": {
"info": {
"input": {
"method": "GET",
"queryParams": {},
"type": "http"
},
"output": {
"example": {
"asOf": "2026-09-15T00:00:00.000Z",
"classes": [],
"endpoints": {
"actionsRetire": "https://x402.klimalabs.com/api/actions/retire",
"certificate": "https://x402.klimalabs.com/api/certificate",
"discover": "https://x402.klimalabs.com/api/discover",
"openapi": "https://x402.klimalabs.com/openapi.json",
"prepareAuth": "https://x402.klimalabs.com/api/prepare-auth",
"prepareRetire": "https://x402.klimalabs.com/api/prepare/retire",
"quote": "https://x402.klimalabs.com/api/quote"
},
"listings": [],
"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."
},
"type": "json"
}
},
"schema": {
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"additionalProperties": false,
"properties": {},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"additionalProperties": false,
"properties": {
"asOf": {
"type": "string"
},
"classes": {
"items": {
"additionalProperties": false,
"properties": {
"carbonClassId": {
"type": "string"
},
"category": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"country": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"creditCount": {
"type": "number"
},
"liquidityTonnes": {
"type": "string"
},
"name": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"priceBasis": {
"const": "indicative",
"type": "string"
},
"priceUsdcPerTonne": {
"type": "string"
},
"priceUsdcPerTonneFormatted": {
"type": "string"
}
},
"required": [
"carbonClassId",
"name",
"category",
"country",
"priceUsdcPerTonne",
"priceUsdcPerTonneFormatted",
"priceBasis",
"liquidityTonnes",
"creditCount"
],
"type": "object"
},
"type": "array"
},
"endpoints": {
"additionalProperties": false,
"properties": {
"actionsRetire": {
"type": "string"
},
"certificate": {
"type": "string"
},
"discover": {
"type": "string"
},
"openapi": {
"type": "string"
},
"prepareAuth": {
"type": "string"
},
"prepareRetire": {
"type": "string"
},
"quote": {
"type": "string"
}
},
"required": [
"discover",
"quote",
"prepareRetire",
"prepareAuth",
"actionsRetire",
"certificate",
"openapi"
],
"type": "object"
},
"listings": {
"items": {
"additionalProperties": false,
"properties": {
"category": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"country": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"creditId": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"expiresAt": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"leftToSellTonnes": {
"type": "string"
},
"listingId": {
"type": "string"
},
"minFillTonnes": {
"type": "string"
},
"priceBasis": {
"const": "firm",
"type": "string"
},
"priceUsdcPerTonne": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"priceUsdcPerTonneFormatted": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"projectName": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"registry": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
},
"vintage": {
"anyOf": [
{
"type": "number"
},
{
"type": "null"
}
]
}
},
"required": [
"listingId",
"projectName",
"creditId",
"registry",
"vintage",
"country",
"category",
"priceUsdcPerTonne",
"priceUsdcPerTonneFormatted",
"priceBasis",
"leftToSellTonnes",
"minFillTonnes",
"expiresAt"
],
"type": "object"
},
"type": "array"
},
"note": {
"type": "string"
}
},
"required": [
"asOf",
"classes",
"listings",
"endpoints",
"note"
],
"type": "object"
},
"type": {
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}
}
},
"lastUpdated": "2026-10-29T09:19:51.774Z",
"quality": {
"l30DaysTotalCalls": 5,
"l30DaysUniquePayers": 5,
"lastCalledAt": "2026-10-29T09:19:51.623Z"
},
"resource": "https://x402-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app/api/catalog",
"serviceName": "Klima Retirement Aggregator",
"tags": [
"carbon",
"climate",
"base"
],
"type": "http",
"x402Version": 2
},
"source": "x402_bazaar",
"summary": "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."
}What the leaf hashes
{"body":"ec7c34df57d4769829cb36461d4559a615d103fef5588d957962de3f062f8a24","id":1037781,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298244357743,"prev":125416,"subject":"x402_bazaar:https://x402-retire-git-feat-paid-indexing-gate-and-openapi-carbonmark.vercel.app/api/catalog","subject_kind":"source_record"}Proof
Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of (242798 rows).
- 0x9c9ec53088e30892e353e93a5fa6c783b0c9a72212ab9e145780211011ac89e2
- 0x9715f187892c7c9ab17c4b7a477a0a42fe92f237bf223100782127931ba95444
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- 0x69d7c401f830be43b306fe2abbb90894fc9dbaf2fa0218bc296cc5eff4bf5fb7
- 0xc73cc175f5f10f85848dc57d20df963ebb40b36508f37b53bb4cf31a72a380e3
- 0x85b6baac84e812e64e655b146c0773b5b63ce3c16275316dd5a24ffe3a6b11ba
- 0xd6dab82338c3f69c6f0cb6d59df444a56ef9afe9d56f12f6bca20631fd02cba1
- 0x9f0fdc725487efb0f69ebec75a9865f87d7c2100ac4a8c77d1227bd8cb8f5b6e
- 0xba974d8cce68cae97f1b46d86c46f81ba31b0145015882ea9423182712e46376
- 0x0a664adce3b5fdf7be65a85ade27e310432b80330e26e9ebe88924ef8c4b1a0d
- 0x22e6c2b51a06b99af947dde3f4939d9059f03ade35d99075fdb6c22f6b762a07
- 0x92baf29212252c438f8f8c855a3143deac423fa668be5886d1e86d13c47132ec
- 0xbb0a2c430dc54812e3f6b6c2468d5b94e0ff1143439ee40a935801628b42ca5f
- 0x96603408ef495fb0a8106bb839ad20e6578c0c0fbded2a9b235438f5985b0f0b
- 0x4a1f9fe26bf92c291485b5fb33b95d1917a994e417ac0526ccef55ede0a90a4c
- 0xe38dc587bc010668982bd78025ac33d7326ffc2587f2de00e848da2718907ecf
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- 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785
- Day root
- 0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c
- Chained
- 0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6
- Published
- On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1