{"id":"5c7a44e0-5e5e-4510-8989-e4e80f4a4790","shortId":"Tsu2M5","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 specific endpoint `/api/v1/wire/9` is one of many API routes offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request (20,000 base units of USDC on Base, which has 6 decimals = $0.02), settled on-chain on the Base network using USDC (contract 0x8335…2913).\n\nThe provider advertises a no-API-key, no-rate-limit model with instant access. Payment is handled entirely through the x402 protocol: callers receive a 402 challenge with payment details, submit an X-PAYMENT header with a signed transaction, and receive the API response upon settlement. The challenge specifies a 300-second timeout window for payment completion.\n\nHowever, the specific functionality of `/api/v1/wire/9` is unclear. The provider's landing page lists numerous endpoints across analytics, AI, finance, and utility categories, but `/api/v1/wire/9` does not appear among them. The docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no additional documentation. Without an OpenAPI schema or detailed docs, the exact input/output behavior of this particular endpoint cannot be determined.","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","crypto-paid API","402 payment API"],"warnings":["The specific endpoint /api/v1/wire/9 is not listed among the provider's documented APIs — its functionality is unknown.","All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no usable content.","No OpenAPI schema or input/output documentation is available.","The exact purpose and response format of this endpoint cannot be verified without making a paid request."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/9","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/9","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 the specific functionality of /api/v1/wire/9 is undocumented. No OpenAPI schema, no request/response examples, and all doc pages return only 'Connect wallet'. The endpoint path does not match any listed API on the provider's landing page, making its purpose 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'/request':13,28 '0.02':12,27,77,92 '000':81 '0x8335':104 '20':80 '2913':105 '300':159 '402':133 '402 payment API' '6':90 'Base network API' 'USDC micropayment API' 'access':7,22,38,121 'across':182 'addit':211 'advertis':108 'ai':64,184 'among':194 'analyt':63,183 'api':6,21,37,52,112,151 'appear':193 'base':9,24,82,87,99 'base-network' 'behavior':223 'call':4,19 'caller':130 'cannot':228 'categori':60,188 'chain':96 'challeng':134,156 'complet':165 'connect':206 'contract':103 'crypto-paid API' 'data':62 'decim':91 'detail':137,218 'determin':230 'doc':197,219 'document':212 'endpoint':32,46,73,181,227 'entir':125 'exact':221 'financ':67,185 'function':169 'handl':124 'header':143 'howev':166 'http-post' 'includ':61 'infrastructur':70 'input/output':222 'instant':120 'key':113 'land':177 'learn':66 'limit':117 'list':179 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':65 'mani':51 'model':118 'network':100 'no-api-key':110 'no-rate-limit':114 'numer':180 'offer':54 'on-chain':94 'one':49 'openapi':215 'page':178,201 'particular':226 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,122,136,142,164 'per':3,18,78 'premium':5,20,36 'price':75,198 'prompt':208 'protocol':43,129 'provid':35,57,107,175 'rate':116 'readm':200 'receiv':131,149 'request':79 'respons':152 'return':203 'rout':53 'schema':216 'second':160 'settl':93 'settlement':154 'sign':146 'span':59 'specif':45,168 'specifi':157 'submit':138 'timeout':161 'transact':147 'unclear':173 'unit':83 'upon':153 'usdc':15,30,85,102 'usdc-settlement' 'use':101 'util':71,187 'via':10,25,39 'wallet':207 'web3':68 'window':162 'without':213 'x':141 'x-payment':140 'x402':11,26,41,128 'x402 API' 'x402-payment'","prices":[{"id":"9146e25b-edbd-41c1-88af-ea07548f5244","listingId":"5c7a44e0-5e5e-4510-8989-e4e80f4a4790","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/9","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:18.603Z"}],"sources":[{"listingId":"5c7a44e0-5e5e-4510-8989-e4e80f4a4790","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/9","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:18.603Z","lastSeenAt":"2026-04-22T08:31:55.037Z"}],"details":{"listingId":"5c7a44e0-5e5e-4510-8989-e4e80f4a4790","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/9\n# Returns 402 with x402 challenge; include X-PAYMENT header with signed USDC payment to complete the request.","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 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/9"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/9"},{"claim":"Provider offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Agent-driven API consumption with per-call crypto payment","Accessing premium data or utility endpoints without API key registration","Programmatic pay-as-you-go API usage settled on Base L2"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents that can handle x402 payment flows","Users who prefer on-chain USDC micropayments over subscriptions"],"notFor":["Users needing detailed API documentation before purchasing","High-volume use cases where per-call pricing may add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.723Z"},"updatedAt":"2026-04-22T08:31:55.037Z"}}