{"x402Version":2,"payTo":"0xf624f9Fe1D3165c5Ca32c7Fbdbf82f4a5b1D2d0e","resources":[{"id":7711,"slug":"7711","resource":"https://x402.klimalabs.com/api/catalog","description":"Entry point to the x402 carbon retirement API on Base. Returns every endpoint you need (free discover, quote and certificate; prepare-auth + POST actions/retire to retire with a signed USDC authorization) plus a live snapshot of the top 3 carbon classes and marketplace listings by liquidity. Start with /api/discover and /api/quote; full spec at /openapi.json.","type":"http","x402Version":2,"accepts":[{"scheme":"exact","network":"eip155:8453","payTo":"0xf624f9Fe1D3165c5Ca32c7Fbdbf82f4a5b1D2d0e","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","amount":"1000","maxTimeoutSeconds":300}],"outputSchema":{"bazaar":{"info":{"input":{"method":"GET","queryParams":{},"type":"http"},"output":{"example":{"asOf":"2026-09-15T00:00:00.000Z","catalogNote":"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":[],"endpoints":{"actionsRetire":{"method":"POST","url":"https://x402.klimalabs.com/api/actions/retire"},"certificate":{"method":"GET","url":"https://x402.klimalabs.com/api/certificate"},"discover":{"method":"GET","url":"https://x402.klimalabs.com/api/discover"},"manifest":{"method":"GET","url":"https://x402.klimalabs.com/.well-known/x402.json"},"note":"Start here: every carbon retirement goes through these endpoints. discover, quote, prepare/retire, prepare-auth and certificate are free to call. Retiring pays the credit price plus the on-chain protocol fee (and executor gas when relayed through actions/retire), funded by your wallet or signed authorization. Full request and response schemas: https://x402.klimalabs.com/openapi.json","openapi":{"method":"GET","url":"https://x402.klimalabs.com/openapi.json"},"prepareAuth":{"method":"GET","url":"https://x402.klimalabs.com/api/prepare-auth"},"prepareRetire":{"method":"GET","url":"https://x402.klimalabs.com/api/prepare/retire"},"quote":{"method":"GET","url":"https://x402.klimalabs.com/api/quote"}},"listings":[]},"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"},"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","method"],"type":"object"},"prepareAuth":{"additionalProperties":false,"properties":{"method":{"enum":["GET","POST"],"type":"string"},"url":{"type":"string"}},"required":["url","method"],"type":"object"},"prepareRetire":{"additionalProperties":false,"properties":{"method":{"enum":["GET","POST"],"type":"string"},"url":{"type":"string"}},"required":["url","method"],"type":"object"},"quote":{"additionalProperties":false,"properties":{"method":{"enum":["GET","POST"],"type":"string"},"url":{"type":"string"}},"required":["url","method"],"type":"object"}},"required":["note","discover","quote","prepareRetire","prepareAuth","actionsRetire","certificate","openapi","manifest"],"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"}},"required":["asOf","endpoints","classes","listings","catalogNote"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"}}},"tags":["bazaar"],"sourceHost":"x402.klimalabs.com","lastUpdated":"2026-09-17T03:28:21.855Z","quality":{"calls30d":2,"uniquePayers30d":2,"lastCalledAt":"2026-09-17T03:28:21.648Z"},"liveness":{},"verified":false,"featured":false}]}