{"id":"db9b89b6-5183-43b6-8e3a-25550026d035","shortId":"eketeA","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-call 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/63` is listed under the generic title \"Premium API Access\" with no further documentation about what it returns. The x402 challenge confirms it is live, accepts POST requests, and charges up to 20,000 base units of USDC (0.02 USD) per call. Payment is made via the x402 exact scheme with no API keys or rate limits required — callers simply attach an X-PAYMENT header to each request.\n\nDocumentation is extremely sparse. The /docs, /pricing, /api, and /README pages all resolve to a near-empty \"Connect wallet\" prompt with no schema, parameter descriptions, or example responses. Without knowing what `/api/v1/wire/63` actually does or what inputs it expects, callers must experiment or rely solely on the generic \"Premium API Access\" label. The site does list sibling endpoints for sentiment analysis, text summarization, geocoding, price feeds, and more, but this particular wire/63 path is not among those publicly listed categories.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","http-post","json-response"],"categories":["api","infrastructure"],"synonyms":["premium API","lowpaymentfee","x402 API","USDC micropayment API","Base network API","pay-per-request API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return only a 'Connect wallet' prompt","The endpoint path /api/v1/wire/63 does not appear in the site's public API listing; its function is unknown","No input or output schema provided; callers cannot know what parameters to send or what to expect back","The site lists many API categories but provides no technical details for any of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/63","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/63","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 402 challenge, confirming pricing and payment details. However, there is no documentation, no input/output schema, no examples, and the specific wire/63 path is not listed among the site's public API catalog. The purpose of this endpoint is entirely unknown beyond the generic 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'/api/v1/wire/63':83,184 '/docs':157 '/pricing':158 '/readme':161 '/request':13,28 '0.02':12,27,70,121 '000':116 '20':115 'Base network API' 'USDC micropayment API' 'accept':108 'access':7,22,38,92,203 'actual':185 'ai/ml':59 'among':228 'analysi':213 'analyt':58 'api':6,21,37,55,91,135,202 'attach':143 'base':9,24,78,117 'broad':48 'call':4,19,54,124 'caller':141,192 'catalog':49 'categori':232 'challeng':103 'charg':112 'confirm':104 'connect':170 'data':57,63 'descript':177 'document':96,152 'empti':169 'endpoint':32,82,210 'exact':131 'exampl':179 'expect':191 'experi':194 'extrem':154 'feed':218 'financ':61 'generic':88,200 'geocod':216 'header':148 'host':46 'http-post' 'infer':60 'infrastructur':65 'input':189 'json-response' 'key':136 'know':182 'label':204 'limit':139 'list':85,208,231 'live':107 'lowpaymentfee' 'lowpaymentfee.com':34 'made':127 'must':193 'near':168 'near-empti':167 'network':79 'page':162 'paramet':176 'particular':223 'path':225 'pay':2,17,52 'pay-per-cal':1,16,51 'pay-per-call' 'pay-per-request API' 'payment':42,125,147 'per':3,18,53,71,123 'post':109 'premium':5,20,36,90,201 'premium API' 'price':68,217 'prompt':172 'protocol':43 'provid':35 'public':230 'rate':138 'reli':196 'request':72,110,151 'requir':140 'resolv':164 'respons':180 'return':100 'schema':175 'scheme':132 'sentiment':212 'settl':73 'sibl':209 'simpli':142 'site':45,206 'sole':197 'span':56 'spars':155 'specif':81 'summar':215 'text':214 'titl':89 'unit':118 'usd':122 'usdc':15,30,75,120 'usdc-base' 'util':66 'via':10,25,39,128 'wallet':171 'web3':62 'wire/63':224 'without':181 'x':146 'x-payment':145 'x402':11,26,41,102,130 'x402 API' 'x402-payment'","prices":[{"id":"d8f37c60-82cb-4b5d-b7c1-cd13f73e01d0","listingId":"db9b89b6-5183-43b6-8e3a-25550026d035","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/63","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:11.363Z"}],"sources":[{"listingId":"db9b89b6-5183-43b6-8e3a-25550026d035","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/63","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:11.363Z","lastSeenAt":"2026-04-22T04:02:16.502Z"}],"details":{"listingId":"db9b89b6-5183-43b6-8e3a-25550026d035","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/63 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/wire/63","body":{},"method":"POST","headers":{"X-PAYMENT":"<x402-payment-token>","Content-Type":"application/json"}},"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 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/63"},{"claim":"The site lists APIs at $0.02/request across data, AI, finance, and infrastructure categories with no API keys or rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/63"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API calls settled on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need keyless pay-per-call API access on Base","Low-volume consumers who want no subscriptions or commitments"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume production workloads requiring well-documented schemas and error handling","Anyone who needs to know exactly what the endpoint returns before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.029Z"},"updatedAt":"2026-04-22T04:02:16.502Z"}}