{"id":"5530e970-1d60-4d2f-8b07-d3205a9a42e3","shortId":"HKkxMb","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 hosts a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/v1/wire/98` is labeled \"Premium API Access\" and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 per call (USDC uses 6 decimals). No API keys or rate limits are advertised — callers simply attach an X-PAYMENT header to each request.\n\nThe broader platform advertises endpoints across four 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 listed endpoints are priced at $0.02 per request.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The specific functionality behind `/api/v1/wire/98` (\"Premium API Access\") is not described beyond its title, making it unclear what data or service it actually returns.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","pay per call API","USDC API","Base network API","micropayment API","lowpaymentfee","wire endpoint","crypto-paid API"],"warnings":["No documentation available — all doc/pricing/README pages show only 'Connect wallet'","No OpenAPI spec or request/response schema provided","The specific purpose of /api/v1/wire/98 ('Premium API Access') is completely undocumented","Cannot verify what data or service is returned by this endpoint"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/98","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/wire/98","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what the endpoint actually does, no request/response schemas, and all doc pages render only 'Connect wallet'. The listing is effectively a 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'/request':13,28 '0.02':12,27,87,160 '000':82 '0x8335':72 '20':81 '2913':73 '6':92 'Base network API' 'USDC API' 'accept':63 'access':42,61,207 'across':118 'actual':222 'advertis':101,116 'ai':128 'amount':79 'analysi':132 'analyt':122 'api':5,20,40,60,95,169,206 'attach':104 'avail':199 'base':8,23,50,75,83 'base-network' 'behind':203 'beyond':211 'broader':114 'call':4,19,89 'caller':102 'categori':120 'classif':135 'collect':34 'connect':178 'contract':71 'convers':152 'crypto-paid API' 'data':121,125,218 'decim':93 'describ':210 'detail':185 'doc':168 'document':163,194 'embed':136 'endpoint':41,54,117,156 'equal':86 'estim':146 'exampl':197 'exchang':141 'export':126 'extrem':165 'feed':140 'financ':137 'four':119 'function':202 'gas':145 'generat':153 'geocod':150 'header':109 'host':32 'infrastructur':148 'insight':127 'key':96 'label':58 'learn':130 'limit':99 'list':155 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':129 'make':214 'maximum':78 'metric':123 'micropayment API' 'network':9,24,51 'no-api-key' 'openapi':189 'page':173 'pay':2,17,37 'pay per call API' 'pay-per-cal':1,16 'pay-per-request':36 'payload':198 'payment':46,66,108 'per':3,18,38,88,161 'platform':6,21,115 'post':64 'post-endpoint' 'premium':59,205 'price':139,158,170 'prompt':180 'protocol':47 'quot':144 'rate':98,142 'readm':172 'render':175 'report':124 'request':39,65,112,162 'request/response':192 'return':223 'schema':193 'sentiment':131 'servic':220 'settl':68 'simpli':103 'spars':166 'spec':190 'specif':53,201 'summar':134 'technic':184 'text':133 'titl':213 'token':143 'unclear':216 'unit':84 'usdc':15,30,70,90 'usdc-settlement' 'use':91 'util':149 'valid':151 'via':10,25,43 'wallet':179 'web3':138 'wire endpoint' 'x':107 'x-payment':106 'x402':11,26,45 'x402 API' 'x402-payment'","prices":[{"id":"523ce066-4dc6-4a4d-aedf-78330da9b8c8","listingId":"5530e970-1d60-4d2f-8b07-d3205a9a42e3","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/wire/98","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:20.447Z"}],"sources":[{"listingId":"5530e970-1d60-4d2f-8b07-d3205a9a42e3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/98","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:20.447Z","lastSeenAt":"2026-04-22T16:32:23.835Z"}],"details":{"listingId":"5530e970-1d60-4d2f-8b07-d3205a9a42e3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/98 \\\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 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/98"},{"claim":"maxAmountRequired is 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/wire/98"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages all render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic access to endpoints without subscription commitments"],"bestFor":["Developers wanting zero-commitment, per-call API pricing","AI agents with x402-compatible payment capabilities","Users who prefer crypto-native (USDC on Base) settlement"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume consumers who would benefit from bulk/subscription pricing","Anyone without a Base-network USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.668Z"},"updatedAt":"2026-04-22T16:32:23.835Z"}}