{"id":"33b0ed61-3c1e-405c-aeea-725cd4a41499","shortId":"DPvVUM","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 path `/api/v1/accounts/190` appears to be one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.\n\nThe endpoint is live and returns a valid x402 challenge. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-scheme payment of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). There are no API keys required, no rate limits advertised, and access is described as instant once payment is included in the X-PAYMENT header. The response MIME type is application/json.\n\nHowever, the specific functionality of the `/api/v1/accounts/190` path is unclear. It does not appear in the provider's listed API catalog (which covers analytics, AI, finance, and utility endpoints). There is no OpenAPI schema, no request/response examples, and the documentation pages returned only \"Connect wallet\" with no substantive content. The provider's landing page confirms the pricing model and general API categories but does not describe what an \"accounts\" endpoint returns or accepts.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","no-rate-limit"],"categories":["api-marketplace","infrastructure"],"synonyms":["low payment fee API","x402 paid API","Base USDC API","micropayment API","pay-per-call API","lowpaymentfee"],"warnings":["The specific endpoint /api/v1/accounts/190 is not listed in the provider's public API catalog — its purpose is unknown.","All documentation pages (/docs, /api, /pricing, /README) returned only 'Connect wallet' with no actual content.","No OpenAPI schema or request/response examples are available.","The broader site lists many endpoint categories but none match the 'accounts' path pattern."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/190","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/accounts/190","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but the specific functionality of /api/v1/accounts/190 is undocumented. No OpenAPI schema, no request/response examples, and documentation pages are empty stubs. The purpose of this particular endpoint cannot be determined from available 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'/request':13,28 '0.02':12,27,78,115 '000':111 '0x8335':101 '20':110 '2913':102 '6':119 'Base USDC API' 'accept':225 'access':7,22,38,132 'account':221 'advertis':130 'ai':67,177 'analyt':66,176 'api':6,21,37,124,172,213 'appear':48,166 'application/json':152 'base':9,24,96,112 'broad':62 'call':4,19 'catalog':63,173 'categori':214 'challeng':90 'confirm':207 'connect':196 'content':201 'contract':100 'cover':175 'data':65 'decim':120 'describ':134,218 'document':192 'endpoint':32,54,82,181,222 'exact':106 'exact-schem':105 'exampl':189 'financ':70,178 'function':156 'general':212 'given':116 'header':146 'host':60 'howev':153 'i.e':114 'includ':140 'infrastructur':73 'instant':136 'json-response' 'key':125 'land':205 'learn':69 'limit':129 'list':171 'live':84 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'mani':53 'micropayment API' 'mime':149 'model':210 'network':97 'no-api-key' 'no-rate-limit' 'offer':55 'one':51 'openapi':185 'page':193,206 'path':46,160 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,91,108,138,145 'per':3,18,79 'premium':5,20,36 'price':76,209 'protocol':43 'provid':35,58,169,203 'rate':128 'request':80 'request/response':188 'requir':126 'respons':148 'return':86,194,223 'schema':186 'scheme':107 'settl':93 'span':64 'specif':45,155 'substant':200 'type':150 'unclear':162 'unit':113 'usdc':15,30,99,117 'usdc-base-network' 'use':98 'util':74,180 'valid':88 'via':10,25,39 'wallet':197 'web3':71 'x':144 'x-payment':143 'x402':11,26,41,89 'x402 paid API' 'x402-payment'","prices":[{"id":"2991ba5e-f398-4aa1-a34c-a4ea73c2acc0","listingId":"33b0ed61-3c1e-405c-aeea-725cd4a41499","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/accounts/190","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:37.335Z"}],"sources":[{"listingId":"33b0ed61-3c1e-405c-aeea-725cd4a41499","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/190","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:37.335Z","lastSeenAt":"2026-04-23T06:04:01.724Z"}],"details":{"listingId":"33b0ed61-3c1e-405c-aeea-725cd4a41499","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/190 \\\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 requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/190"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/190"},{"claim":"Provider lists API categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic account data retrieval (if the accounts endpoint returns user/account info)"],"bestFor":["Developers wanting no-signup, pay-per-call API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing well-documented, schema-defined API contracts","High-volume use cases where per-request pricing at $0.02 adds up quickly","Anyone requiring fiat-only payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.636Z"},"updatedAt":"2026-04-23T06:04:01.724Z"}}