{"uid":"cap_Mkb2f9bh8WYGyRsZivgRD","slug":"klima-retirement-aggregator-catalog-d19f4625","name":"Klima Retirement Aggregator Catalog","description":"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.","url":"https://x402.klimalabs.com/api/catalog?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"asOf":"2026-09-15T00:00:00.000Z","classes":[],"listings":[],"endpoints":{"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","quote":{"url":"https://x402.klimalabs.com/api/quote","method":"GET"},"openapi":{"url":"https://x402.klimalabs.com/openapi.json","method":"GET"},"discover":{"url":"https://x402.klimalabs.com/api/discover","method":"GET"},"manifest":{"url":"https://x402.klimalabs.com/.well-known/x402.json","method":"GET"},"certificate":{"url":"https://x402.klimalabs.com/api/certificate","method":"GET"},"prepareAuth":{"url":"https://x402.klimalabs.com/api/prepare-auth","method":"GET"},"actionsRetire":{"url":"https://x402.klimalabs.com/api/actions/retire","method":"POST"},"prepareRetire":{"url":"https://x402.klimalabs.com/api/prepare/retire","method":"GET"}},"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."}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4K9X-_6EkzKi3zC4Q5mcQ","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Fetches a real-time snapshot of the most liquid tokenized carbon credit supply available for retirement on Base via Klima Protocol and Carbonmark, including classes, listings, prices, and endpoint discovery.","exampleAgentPrompt":"Show me the current catalog of tokenized carbon credits available to retire on Klima Protocol — I want to see what classes and listings are available and their USDC prices per tonne so I can pick which ones to offset with.","exampleUseCases":[{"title":"Browsing carbon credit supply before retiring","prompt":"What tokenized carbon credits are available right now on Klima? I want to see the most liquid listings and their current prices per tonne in USDC before I decide which ones to retire."},{"title":"Corporate offset portfolio planning","prompt":"Pull the latest Klima carbon credit catalog for me — I need to see what classes and listings are available on Base so I can plan which credits to retire for our company's quarterly carbon offset report."},{"title":"Automated retirement bot price check","prompt":"Fetch the current Klima carbon credit catalog so I can check the live USDC prices per tonne across all available classes and listings before my agent executes a retirement transaction."}],"resultDescription":"A JSON snapshot containing a timestamp (asOf), an array of carbon credit classes with indicative live prices in USDC per tonne, an array of firm-ask seller listings, and a directory of all retirement-related endpoints (discover, quote, prepare/retire, prepare-auth, actions/retire, certificate, openapi) with notes on which are free vs. paid.","failureModes":["Payment of $0.001 USDC not fulfilled — returns 402 Payment Required","Catalog temporarily unavailable due to on-chain data lag — may return stale or empty classes/listings arrays","Invalid x402 payment header — returns 402 with payment requirements","Network timeout fetching live on-chain supply data"],"whenToPreferThis":"Use this endpoint when you need a quick, authoritative snapshot of currently available tokenized carbon credit supply on Base (Klima Protocol / Carbonmark) — including prices and endpoint discovery — before committing to a retirement transaction. Prefer this over the free /api/discover endpoint when you specifically want the most liquid supply curated snapshot rather than the full catalog; it costs $0.001 USDC but is optimized for liquid listings.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-18T12:34:34.910Z","isFirstParty":false,"canonicalSlug":"klima-retirement-aggregator-catalog-d19f4625"}