{"id":"a7e71b1f-442b-4f86-a50e-846527771b2d","shortId":"A7YkUp","kind":"x402","title":"Yearn Finance pool data via x402 micropayment on Base network, $0.02 per request.","tagline":"Yearn Finance pool data via x402 micropayment on Base network, $0.02 per request.","description":"This endpoint provides DeFi pool data from Yearn Finance, accessible through the x402 payment protocol on the Base network. Each request costs $0.02 (20,000 base units of USDC with 6 decimals) and requires no API keys, rate limits, or subscriptions — just a per-call micropayment in USDC on Base.\n\nThe endpoint is part of a broader platform at lowpaymentfee.com that offers various pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced at $0.02 per request. The x402 challenge confirms the endpoint is live and accepts POST requests with JSON responses.\n\nSpecific details about the response schema (e.g., which Yearn pool fields are returned — APY, TVL, token composition, etc.) are not documented in the available crawl material. The docs, pricing, and API pages all require wallet connection and provide no additional technical documentation. Users should expect a JSON response containing Yearn pool information, but the exact structure is unspecified.","tags":[],"capabilities":["defi-pool-data","yearn-finance","x402-payment","usdc-base-network","per-request-micropayment","no-api-key","json-response"],"categories":["defi","finance"],"synonyms":["yearn pools","yearn vaults","defi yields","yield farming data","yearn finance API","DeFi pool analytics","yield aggregator data"],"warnings":["No API documentation available — response schema is unknown","No example requests or responses provided","All doc/pricing/API pages require wallet connection and contain no readable content","Unclear what specific Yearn pool data fields are returned"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/yearn/pools","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/defi/yearn/pools","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via 402 challenge with clear pricing, but there is no documentation of request parameters, response schema, or example responses. The docs pages all just show 'Connect wallet' with no technical 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'000':51 '20':50 '6':57 'DeFi pool analytics' 'accept':121 'access':36 'addit':166 'ai/ml':99 'analyt':98 'api':62,95,140,157 'avail':150 'base':9,22,44,52,77 'broader':84 'call':72,94 'challeng':114 'composit':143 'confirm':115 'connect':162 'contain':175 'cost':48 'crawl':151 'data':4,17,32,97,102 'decim':58 'defi':30 'defi yields' 'defi-pool-data' 'detail':128 'doc':154 'document':147,168 'e.g':133 'endpoint':28,79,117 'etc':144 'exact':181 'expect':171 'field':137 'financ':2,15,35 'finance/web3':101 'infer':100 'inform':178 'infrastructur':104 'json':125,173 'json-response' 'key':63 'limit':65 'live':119 'lowpaymentfee.com':87 'materi':152 'micropay':7,20,73 'network':10,23,45 'no-api-key' 'offer':89 'page':158 'part':81 'pay':92 'pay-per-cal':91 'payment':40 'per':12,25,71,93,110 'per-cal':70 'per-request-micropayment' 'platform':85 'pool':3,16,31,136,177 'post':122 'price':107,155 'protocol':41 'provid':29,164 'rate':64 'request':13,26,47,111,123 'requir':60,160 'respons':126,131,174 'return':139 'schema':132 'span':96 'specif':127 'structur':182 'subscript':67 'technic':167 'token':142 'tvl':141 'unit':53 'unspecifi':184 'usdc':55,75 'usdc-base-network' 'user':169 'util':105 'various':90 'via':5,18 'wallet':161 'x402':6,19,39,113 'x402-payment' 'yearn':1,14,34,135,176 'yearn finance API' 'yearn pools' 'yearn vaults' 'yearn-finance' 'yield aggregator data' 'yield farming data'","prices":[{"id":"d714f9f2-59c4-4a42-86c8-279fbbd0154b","listingId":"a7e71b1f-442b-4f86-a50e-846527771b2d","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/defi/yearn/pools","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T12:29:45.161Z"}],"sources":[{"listingId":"a7e71b1f-442b-4f86-a50e-846527771b2d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/yearn/pools","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T12:29:45.161Z","lastSeenAt":"2026-04-22T19:32:38.368Z"}],"details":{"listingId":"a7e71b1f-442b-4f86-a50e-846527771b2d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/yearn/pools \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge accepting USDC on Base network at 20000 base units (~$0.02)","source_url":"https://lowpaymentfee.com/api/v1/defi/yearn/pools"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/yearn/pools"}],"useCases":["Retrieve current Yearn Finance pool data for portfolio dashboards","Automate DeFi yield comparisons across Yearn pools","Feed Yearn pool metrics into trading bots or analytics pipelines","Agent-driven DeFi research without managing API keys"],"bestFor":["AI agents needing on-demand DeFi pool data without subscription overhead","Developers building yield aggregator dashboards","Automated trading systems comparing DeFi yields"],"notFor":["High-frequency polling where per-request costs accumulate quickly","Users needing detailed API documentation before integration","Historical time-series pool data (no evidence this is supported)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.57Z"},"updatedAt":"2026-04-22T19:32:38.368Z"}}