{"id":"9e30a4e4-d7be-402d-ab57-1a6968daeaa3","shortId":"sQNmrN","kind":"x402","title":"AAVE liquidity data via x402 micropayment on Base — $0.02 per request, no API key needed.","tagline":"AAVE liquidity data via x402 micropayment on Base — $0.02 per request, no API key needed.","description":"This endpoint provides AAVE DeFi liquidity data through the x402 payment protocol. It is hosted at lowpaymentfee.com, a platform offering a broad catalog of pay-per-call APIs spanning data analytics, AI/ML, finance/Web3, and infrastructure utilities. Each request costs $0.02 in USDC on the Base network, with no API keys, rate limits, or subscriptions required.\n\nThe specific endpoint `/api/v1/defi/AAVE/liquidity` is a POST endpoint that returns JSON. Based on the x402 challenge, it accepts payments via the \"exact\" scheme, settling in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. The payment timeout is 300 seconds.\n\nDocumentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the AAVE liquidity response contains. The endpoint is confirmed live (returns a proper 402 challenge), but consumers should expect to experiment with the POST body to discover the actual input/output contract.","tags":[],"capabilities":["defi-data","aave-liquidity","x402-payment","usdc-base","pay-per-request","no-api-key"],"categories":["defi","finance"],"synonyms":["AAVE liquidity API","DeFi liquidity data","AAVE pool data","x402 DeFi endpoint","crypto liquidity feed","AAVE TVL","Base USDC micropayment API"],"warnings":["No documentation available — docs, API, pricing, and README pages all render only 'Connect wallet' with no technical content.","No OpenAPI or JSON schema describing request parameters or response structure.","The specific AAVE liquidity endpoint is not listed on the landing page catalog (only generic categories shown); its existence is inferred solely from the x402 challenge.","Response format and fields are completely unknown — consumers must experiment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/AAVE/liquidity","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/liquidity","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 a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages return only a wallet-connect prompt. The actual data contract (input fields, output fields) is entirely 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'0.02':9,24,71,134 '000':125 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':114 '20':124 '300':139 '402':195 '6':130 'AAVE TVL' 'AAVE liquidity API' 'AAVE pool data' 'Base USDC micropayment API' 'DeFi liquidity data' 'aav':1,16,34,183 'aave-liquidity' 'accept':104 'actual':210 'addit':165 'ai/ml':63 'amount':119 'analyt':62 'api':13,28,59,80,151 'base':8,23,76,98,116,126 'beyond':142 'bodi':206 'broad':52 'call':58,122 'catalog':53 'challeng':102,196 'confirm':190 'connect':160 'consum':198 'contain':186 'contract':113,212 'cost':70 'crypto liquidity feed' 'data':3,18,37,61 'decim':131 'defi':35 'defi-data' 'descript':178 'detail':167 'discov':208 'doc':150 'document':141 'endpoint':32,89,94,188 'equal':133 'exact':108 'exampl':175 'expect':200 'experi':202 'extrem':147 'field':181 'finance/web3':64 'host':45 'infrastructur':66 'input/output':211 'json':97 'key':14,29,81 'land':144 'limit':83 'liquid':2,17,36,184 'live':191 'lowpaymentfee.com':47 'maximum':118 'micropay':6,21 'need':15,30 'network':77 'no-api-key' 'offer':50 'openapi':171 'page':145,155 'pay':56 'pay-per-cal':55 'pay-per-request' 'payment':41,105,136 'per':10,25,57,121 'platform':49 'post':93,205 'price':152 'prompt':162 'proper':194 'protocol':42 'provid':33 'rate':82 'readm':154 'render':157 'request':11,26,69 'request/response':174 'requir':86,120 'respons':185 'return':96,192 'schema':172 'scheme':109 'second':140 'settl':110 'span':60 'spars':148 'specif':88 'subscript':85 'technic':166 'timeout':137 'unit':127 'usdc':73,112,129 'usdc-base' 'util':67 'via':4,19,106 'wallet':161 'x402':5,20,40,101 'x402 DeFi endpoint' 'x402-payment'","prices":[{"id":"75b3e0c2-ea45-44c7-9bde-89e64885b8d2","listingId":"9e30a4e4-d7be-402d-ab57-1a6968daeaa3","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/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:29.922Z"}],"sources":[{"listingId":"9e30a4e4-d7be-402d-ab57-1a6968daeaa3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/AAVE/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:29.922Z","lastSeenAt":"2026-04-23T00:31:02.707Z"}],"details":{"listingId":"9e30a4e4-d7be-402d-ab57-1a6968daeaa3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/AAVE/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":{},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/AAVE/liquidity"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/AAVE/liquidity"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying current AAVE liquidity pool metrics for trading or analytics dashboards","Integrating real-time DeFi liquidity data into autonomous agent workflows","Monitoring AAVE protocol health without managing API keys or subscriptions"],"bestFor":["Agents or bots that need on-demand AAVE liquidity snapshots without signup","Developers prototyping DeFi dashboards who want instant, keyless API access","Micropayment-native workflows on Base that already hold USDC"],"notFor":["Users needing comprehensive, documented DeFi APIs with full OpenAPI specs and examples","High-frequency consumers who need bulk pricing or streaming data rather than per-call payments"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:00:24.56Z"},"updatedAt":"2026-04-23T00:31:02.707Z"}}