{"id":"101f3a90-f45f-49e6-bf58-4369ce229ea4","shortId":"c58aUs","kind":"x402","title":"Query Uniswap pool data via x402 micropayment — $0.02 per request on Base network.","tagline":"Query Uniswap pool data via x402 micropayment — $0.02 per request on Base network.","description":"This endpoint at lowpaymentfee.com provides access to Uniswap liquidity pool data through a pay-per-request model using the x402 protocol. Each call costs $0.02 (20,000 base units of USDC on Base network, 6 decimals). No API keys or accounts are required — payment is handled inline via the X-PAYMENT header using USDC on the Base L2 chain.\n\nThe endpoint accepts POST requests and returns JSON. It is part of a broader suite of APIs offered by lowpaymentfee.com spanning DeFi data, analytics, AI/ML inference, finance, and utility services, all priced uniformly at $0.02 per request. The site advertises no rate limits, no minimums, and instant access.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what parameters the Uniswap pools endpoint accepts or what fields it returns. The endpoint is confirmed live (returns a valid x402 402 challenge), but without documentation it is difficult to know exactly what data is returned or what request body format is expected.","tags":[],"capabilities":["uniswap-pool-data","defi-data","x402-micropayment","usdc-base-payment","pay-per-request","no-api-key"],"categories":["defi","finance","crypto"],"synonyms":["uniswap pools","uniswap liquidity pools","defi pool data","uniswap v2 v3 pools","AMM pool info","decentralized exchange pools","base network defi"],"warnings":["No API documentation available — docs, pricing, and README pages all render only 'Connect wallet' with no content.","No OpenAPI or output schema provided; request body format and response fields are unknown.","No request or response examples available anywhere in crawled material.","Endpoint functionality is inferred solely from the URL path; actual behavior is unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/uniswap/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/uniswap/pools","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it exists and accepts payments. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The actual request format and response structure are completely unknown, making this effectively a stub 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'000':54 '20':53 '402':191 '6':62 'AMM pool info' 'accept':90,176 'access':32,135 'account':68 'advertis':127 'ai/ml':112 'analyt':111 'api':65,104,142 'base':12,25,55,60,85 'base network defi' 'bodi':209 'broader':101 'call':50 'chain':87 'challeng':192 'confirm':185 'connect':151 'content':157 'cost':51 'data':4,17,37,110,203 'decentralized exchange pools' 'decim':63 'defi':109 'defi pool data' 'defi-data' 'descript':168 'difficult':198 'doc':141 'document':136,195 'endpoint':28,89,175,183 'exact':201 'exampl':165 'expect':212 'extrem':138 'field':179 'financ':114 'format':210 'handl':73 'header':80 'infer':113 'inlin':74 'instant':134 'json':95 'key':66 'know':200 'l2':86 'limit':130 'liquid':35 'live':186 'lowpaymentfee.com':30,107 'micropay':7,20 'minimum':132 'model':44 'network':13,26,61 'no-api-key' 'offer':105 'openapi':161 'page':146 'paramet':171 'part':98 'pay':41 'pay-per-request':40 'payment':71,79 'per':9,22,42,123 'pool':3,16,36,174 'post':91 'price':119,143 'prompt':153 'protocol':48 'provid':31 'queri':1,14 'rate':129 'readm':145 'render':148 'request':10,23,43,92,124,208 'request/response':164 'requir':70 'return':94,181,187,205 'schema':162 'servic':117 'site':126 'span':108 'spars':139 'suit':102 'uniform':120 'uniswap':2,15,34,173 'uniswap liquidity pools' 'uniswap pools' 'uniswap v2 v3 pools' 'uniswap-pool-data' 'unit':56 'usdc':58,82 'usdc-base-payment' 'use':45,81 'util':116 'valid':189 'via':5,18,75 'wallet':152 'without':194 'x':78 'x-payment':77 'x402':6,19,47,190 'x402-micropayment'","prices":[{"id":"d0a6b279-9e5d-4a61-a40b-3a38b436e57d","listingId":"101f3a90-f45f-49e6-bf58-4369ce229ea4","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/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":"2026-04-21T18:32:09.742Z"}],"sources":[{"listingId":"101f3a90-f45f-49e6-bf58-4369ce229ea4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/uniswap/pools","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:09.742Z","lastSeenAt":"2026-04-22T01:02:01.781Z"}],"details":{"listingId":"101f3a90-f45f-49e6-bf58-4369ce229ea4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/uniswap/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 a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/uniswap/pools"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/uniswap/pools"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieve current Uniswap liquidity pool information for trading or analytics","Feed DeFi pool data into automated trading agents without managing API keys","Integrate on-demand Uniswap pool queries into dashboards or bots via micropayments"],"bestFor":["Agents or bots that need on-demand DeFi pool data without subscription commitments","Developers prototyping DeFi analytics tools who want instant, keyless API access","Low-volume consumers who prefer pay-per-call over monthly plans"],"notFor":["High-frequency trading systems that need sub-second latency and bulk data (no documented rate guarantees)","Users who need detailed API documentation or guaranteed schema stability before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.069Z"},"updatedAt":"2026-04-22T01:02:01.781Z"}}