{"id":"a9893f9a-840f-4df6-80a4-8f5a006603cb","shortId":"2FAGeQ","kind":"x402","title":"Uniswap APY data via x402 micropayment on Base — $0.02 per request, no API key needed.","tagline":"Uniswap APY data via x402 micropayment on Base — $0.02 per request, no API key needed.","description":"This endpoint at lowpaymentfee.com provides Uniswap APY (annual percentage yield) data through the x402 payment protocol. It is part of a broader suite of Finance & Web3 APIs offered by the same provider, which also includes price feeds, exchange rates, token quotes, and gas estimates.\n\nThe endpoint accepts POST requests and is gated by an x402 payment challenge settled in USDC on the Base network. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. No API keys, rate limits, or upfront commitments are required — each request is paid for individually via the x402 header.\n\nDocumentation is extremely sparse. The provider's docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what parameters the endpoint accepts or what shape the APY data takes. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is difficult to know the exact request body format or response structure. Users should expect to experiment or contact the provider for integration details.","tags":[],"capabilities":["defi-apy-data","uniswap-analytics","x402-micropayment","usdc-base-settlement","no-api-key","pay-per-request"],"categories":["defi","finance"],"synonyms":["Uniswap APY","Uniswap yield","DeFi APY API","liquidity pool APY","Uniswap pool returns","annual percentage yield","DeFi analytics"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no technical content.","No OpenAPI or JSON schema for request or response bodies.","No example requests or responses available; request body format is unknown.","The provider hosts many generic-sounding endpoints across unrelated domains (AI, geocoding, finance) — quality and depth of each is unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/uniswap/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/uniswap/apy","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 with a valid x402 402 challenge and clear pricing ($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 listing is essentially a stub with pricing 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'000':103 '20':102 '402':191 '6':108 'DeFi APY API' 'DeFi analytics' 'Uniswap APY' 'Uniswap pool returns' 'Uniswap yield' 'accept':77,175 'also':64 'amount':97 'annual':38 'annual percentage yield' 'api':2,13,17,28,37,57,115,142,180 'base':8,23,93,104 'bodi':204 'broader':52 'call':100 'challeng':87,192 'commit':121 'confirm':186 'connect':151 'contact':215 'data':3,18,41,181 'decim':109 'defi-apy-data' 'descript':169 'detail':158,220 'difficult':198 'doc':141 'document':134,195 'endpoint':32,76,174,184 'equal':111 'estim':74 'exact':202 'exampl':166 'exchang':68 'expect':211 'experi':213 'extrem':136 'feed':67 'financ':55 'format':205 'gas':73 'gate':82 'header':133 'includ':65 'individu':129 'integr':219 'key':14,29,116 'know':200 'limit':118 'liquidity pool APY' 'live':187 'lowpaymentfee.com':34 'maximum':96 'micropay':6,21 'need':15,30 'network':94 'no-api-key' 'offer':58 'openapi':162 'page':146 'paid':127 'paramet':172 'part':49 'pay-per-request' 'payment':45,86 'per':10,25,99 'percentag':39 'post':78 'price':66,143 'prompt':153 'proper':190 'protocol':46 'provid':35,62,139,217 'quot':71 'rate':69,117 'readm':145 'render':148 'request':11,26,79,125,203 'request/response':165 'requir':98,123 'respons':207 'return':188 'schema':163 'settl':88 'shape':178 'spars':137 'structur':208 'suit':53 'take':182 'technic':157 'token':70 'uniswap':1,16,36 'uniswap-analytics' 'unit':105 'upfront':120 'usd':113 'usdc':90,107 'usdc-base-settlement' 'user':209 'via':4,19,130 'wallet':152 'web3':56 'without':194 'x402':5,20,44,85,132 'x402-micropayment' 'yield':40","prices":[{"id":"74949fde-5f5c-48fe-bd74-6da92a18c50b","listingId":"a9893f9a-840f-4df6-80a4-8f5a006603cb","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/uniswap/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":"2026-04-19T12:29:49.926Z"}],"sources":[{"listingId":"a9893f9a-840f-4df6-80a4-8f5a006603cb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/uniswap/apy","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T12:29:49.926Z","lastSeenAt":"2026-04-22T02:31:47.526Z"}],"details":{"listingId":"a9893f9a-840f-4df6-80a4-8f5a006603cb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/uniswap/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":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/uniswap/apy"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/uniswap/apy"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The endpoint is listed under Finance & Web3 category on the provider's homepage","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching current Uniswap pool APY data for yield-farming dashboards","Comparing DeFi yields across protocols programmatically","Feeding APY data into automated portfolio rebalancing agents","Displaying real-time Uniswap returns in a Web3 dApp"],"bestFor":["Agents or bots that need on-demand DeFi yield data without managing API keys","Developers building yield aggregator dashboards","Quick one-off APY lookups settled via crypto micropayments"],"notFor":["Users who need comprehensive documentation or OpenAPI specs before integrating","High-frequency bulk data pulls where per-request pricing may add up","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.36Z"},"updatedAt":"2026-04-22T02:31:47.526Z"}}