{"id":"ff40c5df-39bb-453e-a6b5-93e7a883da07","shortId":"Tc672W","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The site hosts a collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. Each call costs $0.02 in USDC on the Base network, with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/wire/19` is listed under the site's umbrella of services with the generic label \"Premium API Access.\" The x402 challenge confirms it accepts POST requests, settles in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, and charges a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). Payment is made via the `exact` scheme with a 300-second timeout.\n\nThe site's documentation pages are essentially empty (showing only \"Connect wallet\"), so there is no detailed schema, request/response format, or usage documentation available for this specific endpoint. The actual functionality behind `/api/v1/wire/19` is unclear — it may be a generic wire/transfer endpoint or a placeholder. Without further documentation, the exact input parameters and response structure cannot be confirmed.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","http-post"],"categories":["api-gateway","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","wire API","crypto-paid endpoint"],"warnings":["No documentation available — all doc pages show only 'Connect wallet'","The specific functionality of /api/v1/wire/19 is unclear; 'Premium API Access' is a generic label","No input or output schema provided beyond the x402 challenge metadata","Cannot verify what data or service this endpoint actually returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/19","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/19","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, and the actual functionality of /api/v1/wire/19 is unknown. The docs pages are empty 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'/request':16,34 '0.02':15,33,75,138 '000':134 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':125 '20':133 '300':153 '6':142 'Base network API' 'USDC micropayment API' 'accept':118 'access':7,25,44,112 'actual':185 'ai':64 'analyt':63 'api':6,24,43,60,84,111 'avail':179 'base':9,27,80,127,135 'base-network' 'behind':187 'call':4,22,73 'cannot':211 'challeng':115 'charg':129 'collect':54 'commit':91 'confirm':116,213 'connect':166 'contract':124 'cost':74 'crypto-paid endpoint' 'data':62 'decim':143 'detail':172 'document':159,178,203 'empti':163 'endpoint':38,95,183,197 'essenti':162 'exact':149,205 'financ':67 'format':175 'function':186 'generic':108,195 'given':139 'host':52 'http-post' 'i.e':137 'infrastructur':70 'input':206 'key':85 'label':109 'learn':66 'limit':88 'list':98 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':65 'made':146 'maximum':131 'may':192 'network':10,28,81 'no-api-key' 'page':160 'paramet':207 'pay':2,20,57 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':56 'payment':48,144 'per':3,21,58 'placehold':200 'post':119 'premium':5,23,42,110 'protocol':13,31,49 'provid':41 'rate':87 'request':59,120 'request/response':174 'requir':92 'respons':209 'schema':173 'scheme':150 'second':154 'servic':105 'settl':121 'show':164 'site':51,101,157 'span':61 'specif':94,182 'structur':210 'timeout':155 'umbrella':103 'unclear':190 'unit':136 'usag':177 'usdc':18,36,77,123,140 'usdc-settlement' 'util':71 'via':11,29,45,147 'wallet':167 'web3':68 'wire API' 'wire/transfer':196 'without':201 'x402':12,30,47,114 'x402 API' 'x402-payment'","prices":[{"id":"f1c5554e-61ed-4e1b-bc02-692fd874ac5c","listingId":"ff40c5df-39bb-453e-a6b5-93e7a883da07","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/19","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:01.051Z"}],"sources":[{"listingId":"ff40c5df-39bb-453e-a6b5-93e7a883da07","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/19","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:01.051Z","lastSeenAt":"2026-04-22T10:02:36.099Z"}],"details":{"listingId":"ff40c5df-39bb-453e-a6b5-93e7a883da07","quickStartSnippet":"# Send a POST request with x402 payment header\ncurl -X POST https://lowpaymentfee.com/api/v1/wire/19 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <your-x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint charges a maximum of 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/19"},{"claim":"Site advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/19"}],"useCases":["Accessing premium API services without traditional API key registration","Making single pay-per-use API calls settled in USDC on Base","Integrating x402-compatible agents with low-cost per-request billing"],"bestFor":["Developers wanting zero-commitment pay-per-call API access","AI agents with x402 payment capability on Base network","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or schemas before integrating","High-volume use cases where subscription pricing would be cheaper","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.479Z"},"updatedAt":"2026-04-22T10:02:36.099Z"}}