{"id":"437cb22a-9695-407a-b000-8ebf60397eb9","shortId":"mgBHcp","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/19` appears to be one of many endpoints offered by the platform, which advertises a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.\n\nThe x402 challenge confirms the endpoint is live and accepts payment on the Base network in USDC (contract 0x8335…2913) with a maximum amount 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. The endpoint accepts HTTP POST requests and returns `application/json`. No API keys or rate limits are advertised; access is granted purely through per-request micropayment.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/accounts/19` endpoint specifically returns. The platform's landing page lists many endpoints but provides no detail on input parameters or response formats for any of them. The exact purpose of the `accounts/19` resource is unclear from available material.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","json-response","http-post"],"categories":["api","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","micropayment API","USDC API access","lowpaymentfee","Base network API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","The specific function of /api/v1/accounts/19 is undocumented; 'Premium API Access' is the only description.","No OpenAPI schema, no request body schema, and no response examples are provided.","No information on data freshness, uptime guarantees, or service-level agreements."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/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/accounts/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/request in USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/accounts/19 is unknown. The docs/pricing/README pages are all blank beyond a wallet connect 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'/request':13,28 '0.02':12,27,78,111 '000':107 '0x8335':99 '20':106 '2913':100 '300':126 '6':115 'Base network API' 'USDC API access' 'accept':90,131 'access':7,22,38,146 'accounts/19':222 'advertis':60,145 'ai':67 'amount':104 'analyt':66 'api':6,21,37,139,162 'appear':48 'application/json':137 'avail':227 'base':9,24,94,108 'base-network' 'broad':62 'call':4,19 'catalog':63 'challeng':83 'confirm':84 'connect':170 'content':176 'contract':98 'data':65 'decim':116 'descript':187 'detail':206 'doc':160 'document':155 'endpoint':32,54,86,130,192,202 'exact':122,218 'exampl':184 'extrem':157 'financ':70 'format':212 'given':112 'grant':148 'http':132 'http-post' 'i.e':110 'infrastructur':73 'input':208 'json-response' 'key':140 'land':198 'learn':69 'limit':143 'list':200 'live':88 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'made':119 'mani':53,201 'materi':228 'maximum':103 'micropay':154 'micropayment API' 'network':95 'offer':55 'one':51 'openapi':180 'page':165,199 'paramet':209 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'payment':42,91,117 'per':3,18,79,152 'per-request':151 'per-request-billing' 'platform':58,196 'post':133 'premium':5,20,36 'premium API' 'price':76,161 'prompt':172 'protocol':43 'provid':35,204 'pure':149 'purpos':219 'rate':142 'readm':164 'render':167 'request':80,134,153 'request/response':183 'resourc':223 'respons':211 'return':136,194 'schema':181 'scheme':123 'second':127 'span':64 'spars':158 'specif':45,193 'timeout':128 'unclear':225 'unit':109 'usdc':15,30,97,113 'usdc-micropayment' 'util':74 'via':10,25,39,120 'wallet':171 'web3':71 'x402':11,26,41,82 'x402 endpoint' 'x402-payment'","prices":[{"id":"971ec6a9-2c49-4f47-9496-ed20dc6c669d","listingId":"437cb22a-9695-407a-b000-8ebf60397eb9","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/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":"2026-04-18T18:39:20.890Z"}],"sources":[{"listingId":"437cb22a-9695-407a-b000-8ebf60397eb9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/19","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:20.890Z","lastSeenAt":"2026-04-22T18:31:05.165Z"}],"details":{"listingId":"437cb22a-9695-407a-b000-8ebf60397eb9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/19 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge accepting USDC on Base with maxAmountRequired of 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/accounts/19"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/19"}],"useCases":["Accessing premium data or services with per-request USDC micropayments on Base","Agent-driven API consumption without API keys or subscriptions","Programmatic access to account-level data behind a paywall"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:39.209Z"},"updatedAt":"2026-04-22T18:31:05.165Z"}}