{"slug":"x402-carbon-retirement-api-838d3be9","name":"x402 Carbon Retirement API","summary":"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.","status":"live","indexable":true,"listed_since":"2026-10-25T17:50:12.833655Z","sources":[{"source":"x402_bazaar","external_id":"https://x402.klimalabs.com/api/catalog","owner_address":"0xf624f9fe1d3165c5ca32c7fbdbf82f4a5b1d2d0e","seen_at":"2026-10-26T17:11:27.580458Z","removed_at":null}],"endpoints":[{"url":"https://x402.klimalabs.com/api/catalog","host":"x402.klimalabs.com","protocol":"x402","state":"live","last_probe_at":"2026-10-25T18:06:10.550954Z","last_ok_at":"2026-10-25T18:06:10.550954Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"x402-klimalabs-com-30efb24a","name":"x402.klimalabs.com"}],"payment_options":[],"usage":{"source":"x402_bazaar","unique_payers_30d":5,"paid_calls_30d":88,"last_paid_at":"2026-10-26T11:30:50.961Z","reported_at":"2026-10-26T17:11:27.580458Z"},"assessment":{"method":"2026.10.1","checks":[{"id":"answers","state":"pass","reason":"Answered a check 21 hours ago."},{"id":"owner","state":"fail","reason":"No one has proven control of its domain or of the wallet it is paid at."},{"id":"track_record","state":"fail","reason":"Listed for 0 days; 30 are needed."},{"id":"real_customers","state":"fail","reason":"5 different wallets paid it in 30 days, as the x402 Bazaar reports (not yet counted by addrbook); 10 are needed."},{"id":"clean_scan","state":"not_applicable","reason":"Not an MCP server."}],"passed":1,"applicable":4,"contradicted":false,"computed_at":"2026-10-26T15:42:15.580419Z"},"identity":{"endpoint_domains":["klimalabs.com"],"proven_domains":[],"proven_wallets":[],"namesakes":[],"namesake_count":0},"replies":[],"customers":null,"scan":null,"notice":"Not affiliated with addrbook — claim or request removal."}