{"id":"4f077e5c-eeb7-4ba7-b6ce-da3fa4d143f7","shortId":"G2wJGU","kind":"x402","title":"Aave APY data via x402 micropayment on Base network for $0.02 per request.","tagline":"Aave APY data via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint provides Aave DeFi protocol APY (Annual Percentage Yield) data, accessible via the x402 payment protocol on the Base network. It is part of a broader suite of APIs offered by lowpaymentfee.com covering data analytics, AI/ML inference, finance/Web3, and infrastructure utilities.\n\nThe endpoint accepts POST requests and returns JSON. Payment is settled in USDC on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys or rate limits are advertised — access is gated purely by the x402 payment header. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a max timeout of 300 seconds.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. The specific request body schema and response format for the Aave APY endpoint are not documented anywhere in the available material, so the exact fields returned (e.g., supply APY, borrow APY, per-asset breakdown) must be inferred from the endpoint path alone.","tags":[],"capabilities":["defi-data","aave-apy","x402-payment","usdc-base","micropayment-api","json-response"],"categories":["defi","finance"],"synonyms":["Aave yield","Aave interest rate","DeFi APY","lending rate","Aave supply rate","Aave borrow rate","x402 DeFi API"],"warnings":["No request or response schema documented anywhere","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content","Exact response fields for Aave APY data are inferred from the URL path only","No SLA, uptime guarantees, or data source provenance disclosed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/aave/apy","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/aave/apy","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) with clear pricing and payment details, but there is no documentation of request/response schemas, no OpenAPI spec, and all doc pages render only 'Connect wallet'. The actual data returned is entirely 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'000':91 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':125 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':85 '20':90 '300':131 '6':101 'Aave borrow rate' 'Aave interest rate' 'Aave supply rate' 'Aave yield' 'DeFi APY' 'aav':1,14,30,167 'aave-apy' 'accept':71 'access':38,111 'address':123 'advertis':110 'ai/ml':63 'alon':199 'analyt':62 'annual':34 'anywher':173 'api':2,15,33,56,104,140,168,185,187 'asset':190 'avail':176 'base':8,21,46,83,92 'bodi':160 'borrow':186 'breakdown':191 'broader':53 'connect':149 'contract':84 'cost':88 'cover':60 'crawl':138 'data':3,16,37,61 'decim':102 'defi':31 'defi-data' 'detail':156 'doc':139 'document':133,172 'e.g':183 'endpoint':28,70,169,197 'equal':95 'exact':180 'extrem':135 'field':181 'finance/web3':65 'format':164 'gate':113 'header':119 'infer':64,194 'infrastructur':67 'json':76 'json-response' 'key':105 'lending rate' 'limit':108 'lowpaymentfee.com':59 'materi':177 'max':128 'micropay':6,19 'micropayment-api' 'must':192 'network':9,22,47 'offer':57 'page':144 'part':50 'path':198 'payment':42,77,118,121 'per':12,25,97,189 'per-asset':188 'percentag':35 'post':72 'price':141 'prompt':151 'protocol':32,43 'provid':29 'pure':114 'rate':107 'readm':143 'recipi':122 'render':146 'request':13,26,73,98,159 'respons':163 'return':75,182 'schema':161 'second':132 'settl':79 'spars':136 'specif':158 'suit':54 'suppli':184 'technic':155 'timeout':129 'unit':93 'usdc':81,99 'usdc-base' 'use':100 'util':68 'via':4,17,39 'wallet':150 'x402':5,18,41,117 'x402 DeFi API' 'x402-payment' 'yield':36","prices":[{"id":"9fb61996-b7d0-4945-a0da-94fb114dba58","listingId":"4f077e5c-eeb7-4ba7-b6ce-da3fa4d143f7","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/aave/apy","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T06:29:38.505Z"}],"sources":[{"listingId":"4f077e5c-eeb7-4ba7-b6ce-da3fa4d143f7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/aave/apy","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T06:29:38.505Z","lastSeenAt":"2026-04-22T19:32:38.118Z"}],"details":{"listingId":"4f077e5c-eeb7-4ba7-b6ce-da3fa4d143f7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/aave/apy \\\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 advertising USDC on Base at 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/defi/aave/apy"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/aave/apy"},{"claim":"Site advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching current Aave lending/borrowing APY for portfolio dashboards","Automated DeFi yield comparison across protocols","Agent-driven yield farming strategy selection","Real-time APY monitoring for alerting systems"],"bestFor":["AI agents needing on-demand DeFi yield data without API key management","Developers building yield aggregators who want pay-per-call pricing","Automated systems that need Aave APY without subscription commitments"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need historical APY time-series data (not indicated by endpoint)","Applications requiring free or fiat-only payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.756Z"},"updatedAt":"2026-04-22T19:32:38.118Z"}}