Entry point to the x402 Carbon Retirement API on Base
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.
Answeringour last check, 2026-09-24
1 of 1checks answered this week
810 msmedian answer time
$0.001listed price per call
$0.001price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://x402.klimalabs.com/api/catalog
| Category | Market data |
|---|---|
| Provider host | x402.klimalabs.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 4 from 4 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-09-24 | valid payment request | 402 | $0.001 | 810 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {},
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
},
"catalogNote": {
"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": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"url",
"method"
],
"type": "object"
},
"certificate": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"url",
"method"
],
"type": "object"
},
"discover": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"url",
"method"
],
"type": "object"
},
"manifest": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"url",
"method"
],
"type": "object"
},
"note": {
"type": "string"
},
"openapi": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET",
"POST"
],
"type": "string"
},
"url": {
"type": "string"
}
},
"required": [
"url