{"id":"38be801b-b3a2-46d3-be52-f5c698413d2f","shortId":"5EVEg5","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wire/163` is listed under the generic title \"Premium API Access\" with no further documentation on what it returns. The x402 challenge confirms it is live, accepts POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 (USDC uses 6 decimals). Payment is made via the `exact` scheme with a 300-second timeout. No API keys or rate limits are advertised; access is gated purely by the x402 micropayment.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no description of what data or functionality this particular wire endpoint provides. The site's landing page lists many endpoints across categories but does not map `/api/v1/wire/163` to any specific capability. Prospective users should treat this as an opaque endpoint until the provider publishes proper documentation.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","http-post","micropayment"],"categories":["api-gateway","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 micropayment API","USDC pay-per-call","Base network API","wire 163"],"warnings":["No documentation exists for /api/v1/wire/163 — its purpose and response format are unknown","All doc/pricing/API/README pages render only 'Connect wallet' with no technical content","No OpenAPI or schema available; request and response formats are entirely undocumented","The endpoint path does not match any of the advertised API categories on the landing page"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/163","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/163","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what it actually does. No OpenAPI spec, no request/response schema, no examples, and the endpoint path ('wire/163') doesn't map to any described capability on the site. This is effectively a stub 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'/request':13,28 '0.02':12,27,70,129 '000':119 '0x8335':124 '20':118 '300':143 '6':132 'Base network API' 'USDC pay-per-call' 'accept':108 'access':7,22,38,92,154 'across':214 'addit':182 'advertis':153 'ai/ml':59 'analyt':58 'api':6,21,37,55,91,147,169 'base':9,24,78,120,126 'broad':48 'call':4,19 'capabl':224 'catalog':49 'categori':215 'challeng':103 'confirm':104 'connect':177 'data':57,63,198 'decim':133 'descript':195 'detail':184 'doc':167 'document':96,162,239 'endpoint':32,82,204,213,233 'equal':128 'exact':139 'extrem':164 'financ':61 'function':200 'gate':156 'generic':88 'host':46 'http-post' 'infer':60 'infrastructur':65 'key':148 'land':209 'limit':151 'list':85,211 'live':107 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'made':136 'mani':212 'map':219 'micropay':161 'micropayment' 'network':79 'opaqu':232 'openapi':188 'page':172,210 'particular':202 'pay':2,17,52 'pay-per-cal':1,16 'pay-per-request':51 'payment':42,114,134 'per':3,18,53,71 'post':109 'premium':5,20,36,90 'price':68,168 'prompt':179 'proper':238 'prospect':225 'protocol':43 'provid':35,205,236 'publish':237 'pure':157 'rate':150 'readm':171 'render':174 'request':54,72,110 'request/response':191 'requir':112 'return':100 'schema':192 'scheme':140 'second':144 'settl':73 'site':45,207 'span':56 'spars':165 'spec':189 'specif':81,223 'technic':183 'timeout':145 'titl':89 'treat':228 'unit':121 'usdc':15,30,75,123,130 'usdc-base' 'use':131 'user':226 'util':66 'via':10,25,39,137 'wallet':178 'web3':62 'wire':203 'wire 163' 'x402':11,26,41,102,160 'x402 micropayment API' 'x402-payment'","prices":[{"id":"e2e629fa-bff9-4578-b3b8-bb3a98ad5f70","listingId":"38be801b-b3a2-46d3-be52-f5c698413d2f","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/163","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:50.743Z"}],"sources":[{"listingId":"38be801b-b3a2-46d3-be52-f5c698413d2f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/163","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:50.743Z","lastSeenAt":"2026-04-22T10:32:30.595Z"}],"details":{"listingId":"38be801b-b3a2-46d3-be52-f5c698413d2f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/163 \\\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 site advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/wire/163"},{"claim":"The site lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic pay-per-call API access without API keys","Agent-driven micropayment workflows on Base","Testing x402 payment protocol integrations"],"bestFor":["Developers experimenting with x402 micropayment protocols","AI agents that need keyless, pay-per-request API access","Users who want to avoid subscriptions and pay only per call"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Applications requiring well-defined request/response schemas","High-volume use cases where per-call pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.091Z"},"updatedAt":"2026-04-22T10:32:30.595Z"}}