{"id":"0209a26f-ffc2-4246-90cc-a0620e937f78","shortId":"b2heUx","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API marketplace that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/trades/175` is listed as \"Premium API Access\" and costs up to $0.02 per call (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is made via the x402 exact scheme with no API keys, no rate limits, and no upfront commitments required.\n\nThe broader platform advertises four endpoint categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02/request price point.\n\nThe specific `/api/v1/trades/175` endpoint does not have detailed documentation available — the docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the \"trades/175\" resource actually returns. The endpoint is confirmed live (returns a proper 402 x402 challenge), but the lack of documentation makes it difficult to determine the exact data or functionality provided by this particular route.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","no-api-key","no-rate-limit","json-response","post-method"],"categories":["finance","data"],"synonyms":["x402 API","micropayment API","pay-per-request API","Base USDC API","lowpaymentfee","trades API","crypto payment API"],"warnings":["No documentation available — docs, pricing, and API pages return only 'Connect wallet' with no content","No OpenAPI or output schema describing what /api/v1/trades/175 returns","The endpoint path 'trades/175' suggests a specific resource but its purpose is undocumented","No request body schema or response examples available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/175","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/trades/175","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 pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation describing what /api/v1/trades/175 actually returns. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':17,34,162 '0.02':16,33,78,93,161 '000':84 '20':83 '402':218 '6':91 'Base USDC API' 'access':45,73 'actual':208 'advertis':117 'ai':10,27,128 'analysi':132 'analyt':122 'api':4,21,41,72,104,179 'avail':174 'base':7,24,61,85 'behind':51 'broader':115 'call':80 'categori':120 'challeng':220 'classif':135 'commit':112 'confirm':213 'connect':185 'content':191 'convers':152 'cost':75 'crypto payment API' 'data':9,26,121,125,233 'decim':92 'descript':202 'detail':172 'determin':230 'difficult':228 'doc':176 'document':173,225 'embed':136 'endpoint':14,31,50,65,119,155,168,211 'estim':146 'exact':100,232 'exampl':199 'exchang':141 'export':126 'feed':140 'financ':11,28,137 'four':118 'function':235 'gas':145 'gate':3,20,44 'generat':153 'geocod':150 'infrastructur':148 'insight':127 'json-response' 'key':105 'lack':223 'learn':130 'limit':108 'list':69,157 'live':214 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':129 'made':96 'make':226 'marketplac':42 'maxamountrequir':81 'metric':123 'micropay':55 'micropayment API' 'network':62 'no-api-key' 'no-rate-limit' 'offer':8,25 'openapi':195 'page':180 'particular':239 'pay-per-request API' 'payment':94 'per':53,79 'per-request':52 'per-request-micropayment' 'platform':5,22,116 'point':164 'post-method' 'premium':71 'price':139,163,177 'prompt':187 'proper':217 'protocol':40 'provid':236 'quot':144 'rate':107,142 'report':124 'request':54 'request/response':198 'requir':113 'resourc':207 'return':182,209,215 'rout':240 'schema':196 'scheme':101 'sentiment':131 'settl':56 'specif':64,166 'summar':134 'text':133 'token':143 'trades API' 'trades/175':206 'unit':86 'upfront':111 'usdc':58,88 'usdc-base' 'util':13,30,149 'valid':151 'varieti':48 'via':97 'wallet':186 'web3':138 'x402':2,19,39,99,219 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"f57f7658-ca54-4a78-9753-f6063d622a6b","listingId":"0209a26f-ffc2-4246-90cc-a0620e937f78","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/trades/175","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:43.212Z"}],"sources":[{"listingId":"0209a26f-ffc2-4246-90cc-a0620e937f78","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/175","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:43.212Z","lastSeenAt":"2026-04-26T06:33:33.928Z"}],"details":{"listingId":"0209a26f-ffc2-4246-90cc-a0620e937f78","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/175 \\\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 x402 challenge with maxAmountRequired of 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/trades/175"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/175"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing trade data or premium financial information on a pay-per-call basis","Integrating x402-compatible micropayment APIs into agent workflows","Consuming API services without managing API keys or subscriptions"],"bestFor":["Agents or developers wanting zero-commitment, pay-as-you-go API access","x402-native applications settling payments in USDC on Base","Low-volume or bursty workloads where per-request pricing is economical"],"notFor":["Users needing detailed API documentation or OpenAPI schemas before integration","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone unable to pay in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:46.075Z"},"updatedAt":"2026-04-26T06:33:33.928Z"}}