{"id":"0f565e5c-8aeb-4aae-a000-29dacfe40e74","shortId":"tvwNsK","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transfers/62` is listed as \"Premium API Access\" and costs $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe broader platform advertises multiple API categories including 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 and settle via USDC on Base.\n\nHowever, the specific endpoint being listed here (`/api/v1/transfers/62`) is labeled only as \"Premium API Access\" with no further documentation about what it actually returns or what input it expects. The docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without schema details or response examples, the actual functionality of this particular endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","http-post"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","crypto-paid API","402 payment API"],"warnings":["No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no substantive content","The specific functionality of /api/v1/transfers/62 ('Premium API Access') is entirely undocumented","No input or output schema is provided beyond the basic HTTP POST method","The endpoint path suggests a transfer-related operation but this is speculative"],"endpointUrl":"https://lowpaymentfee.com/api/v1/transfers/62","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/transfers/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, no response examples, and the endpoint name 'Premium API Access' at path '/api/v1/transfers/62' gives no indication of actual functionality. Docs pages returned only 'Connect wallet' with no 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'/request':13,28,145 '0.02':12,27,65,144 '000':69 '20':68 '402 payment API' '6':75 'Base network API' 'USDC micropayment API' 'accept':46 'access':62,168 'account':80 'actual':176,207 'advertis':99 'ai':111 'analysi':115 'analyt':105 'api':5,20,38,61,78,101,167 'attach':88 'base':8,23,51,70,153 'broader':97 'call':4,19,67 'caller':86 'categori':102 'classif':118 'connect':193 'content':199 'convers':135 'cost':64 'crypto-paid API' 'data':104,108 'decim':76 'detail':202 'doc':184 'document':172 'embed':119 'endpoint':55,138,157,212 'estim':129 'exampl':205 'exchang':124 'expect':182 'export':109 'feed':123 'financ':120 'function':208 'gas':128 'generat':136 'geocod':133 'header':92 'howev':154 'http-post' 'includ':103 'infrastructur':131 'input':180 'insight':110 'key':79 'label':163 'learn':113 'limit':83 'list':58,140,159 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':112 'metric':106 'multipl':100 'network':9,24,52 'no-api-key' 'page':188 'particular':211 'pay':2,17,35 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':34 'payment':48,91 'per':3,18,36,66 'platform':6,21,39,98 'point':147 'premium':60,166 'price':122,146,185 'prompt':195 'protocol':44 'quot':127 'rate':82,125 'readm':187 'remain':213 'report':107 'request':37,95 'requir':85 'respons':204 'return':177,190 'schema':201 'sentiment':114 'settl':149 'simpli':87 'specif':54,156 'substant':198 'summar':117 'text':116 'token':126 'unclear':214 'unit':71 'usdc':15,30,47,73,151 'usdc-base-network' 'use':41 'util':132 'valid':134 'via':10,25,150 'wallet':194 'web3':121 'without':200 'x402':11,26,43,90 'x402 API' 'x402-payment'","prices":[{"id":"4576e044-5250-49f8-8791-3119c215cce9","listingId":"0f565e5c-8aeb-4aae-a000-29dacfe40e74","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/transfers/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:27:52.379Z"}],"sources":[{"listingId":"0f565e5c-8aeb-4aae-a000-29dacfe40e74","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/transfers/62","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:27:52.379Z","lastSeenAt":"2026-04-22T12:04:44.487Z"}],"details":{"listingId":"0f565e5c-8aeb-4aae-a000-29dacfe40e74","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/transfers/62 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/transfers/62"},{"claim":"All endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic access to transfer-related data or operations without subscription commitments"],"bestFor":["Developers who want to pay per call without API key management","AI agents with x402-compatible wallets on Base","Users who prefer crypto-native micropayment access over subscription billing"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume use cases where per-request pricing at $0.02 adds up significantly","Users without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:33.783Z"},"updatedAt":"2026-04-22T12:04:44.487Z"}}