{"id":"296e9188-9f11-4f8e-bfd3-f579265f690c","shortId":"KbXKav","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. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint `/api/v1/wire/104` is labeled \"Premium API Access\" but its exact functionality is not documented beyond that title. The x402 challenge confirms it is live, accepts POST requests, and charges a maximum of 20,000 base units of USDC (i.e., $0.02) per call. Payment is made to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, using the USDC contract at `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The response MIME type is `application/json`.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what data or functionality this particular wire endpoint returns. Prospective users should be aware that the actual behavior of this endpoint is unclear from available materials.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-marketplace","crypto-payments"],"synonyms":["lowpaymentfee","x402 api","pay per call api","usdc api","base network api","micropayment api","premium api"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The exact functionality of /api/v1/wire/104 ('Premium API Access') is undocumented and unclear","No examples of request or response payloads available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/104","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/104","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 no documentation, no OpenAPI spec, no request/response schema, and no explanation of what 'Premium API Access' actually does. The listing is effectively a stub with only pricing and protocol details 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'/request':13,28 '0.02':12,27,82,145 '000':139 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':153 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':161 '20':138 'accept':130 'access':7,22,38,112 'actual':218 'address':152 'ai':69 'analyt':68 'api':6,21,37,65,94,111,174 'application/json':167 'avail':226 'awar':215 'base':9,24,90,140,155 'base network api' 'behavior':219 'beyond':120 'broad':58 'call':4,19,147 'catalog':59 'challeng':125 'charg':134 'commit':102 'confirm':126 'connect':183 'content':189 'contract':159 'data':67,203 'descript':200 'doc':173 'document':119,168 'endpoint':32,49,78,106,209,222 'exact':115 'extrem':170 'financ':72 'function':116,205 'host':56 'i.e':144 'infrastructur':75 'json-response' 'key':95 'label':109 'learn':71 'limit':98 'live':129 'lowpaymentfee' 'lowpaymentfee.com':34,53 'machin':70 'made':150 'mani':48 'materi':227 'maximum':136 'micropayment api' 'mime':164 'minimum':101 'network':91 'no-api-key' 'offer':50 'one':46 'openapi':193 'page':178 'particular':207 'pay':2,17,62 'pay per call api' 'pay-per-cal':1,16 'pay-per-request':61 'payment':42,148 'per':3,18,63,83,146 'platform':54 'post':131 'post-method' 'premium':5,20,36,110 'premium api' 'price':80,175 'prompt':185 'prospect':211 'protocol':43 'provid':35 'rate':97 'readm':177 'render':180 'request':64,84,132 'request/response':196 'requir':103 'respons':163 'return':210 'schema':197 'settl':85 'span':66 'spars':171 'spec':194 'specif':105 'titl':122 'type':165 'unclear':224 'unit':141 'usdc':15,30,87,143,158 'usdc api' 'usdc-base' 'use':156 'user':212 'util':76 'via':10,25,39 'wallet':184 'web3':73 'wire':208 'x402':11,26,41,124 'x402 api' 'x402-payment'","prices":[{"id":"8c56befd-5891-46b6-a653-f331729151b7","listingId":"296e9188-9f11-4f8e-bfd3-f579265f690c","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/104","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:31.895Z"}],"sources":[{"listingId":"296e9188-9f11-4f8e-bfd3-f579265f690c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/104","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:31.895Z","lastSeenAt":"2026-04-22T04:02:14.794Z"}],"details":{"listingId":"296e9188-9f11-4f8e-bfd3-f579265f690c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/104 \\\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 HTTP 402 with x402 challenge, confirming it is live on Base with USDC","source_url":"https://lowpaymentfee.com/api/v1/wire/104"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wire/104"},{"claim":"Platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API endpoint with per-request USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers exploring x402 payment-gated APIs","Agents that can settle USDC payments on Base automatically","Users who want no-commitment, no-key API access"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without USDC on the Base network","Use cases requiring well-defined request/response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.983Z"},"updatedAt":"2026-04-22T04:02:14.794Z"}}