{"id":"5cd0afd9-fcc3-4582-b534-ef9e56a2cbfb","shortId":"5q5jJC","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","description":"This endpoint at `/api/v1/accounts/124` is part of a broader API platform hosted at lowpaymentfee.com that offers pay-per-request access to various services across data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The platform advertises a flat $0.02 per request with no API keys, no rate limits, and instant access.\n\nThe specific `/api/v1/accounts/124` endpoint is labeled \"Premium API Access\" and accepts POST requests. The x402 challenge indicates a maximum amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the `exact` scheme to the specified payTo address, with a 300-second timeout. The response MIME type is `application/json`.\n\nWhile the landing page lists many endpoints spanning sentiment analysis, text summarization, embeddings, price feeds, geocoding, and more, documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The actual functionality behind this particular accounts endpoint is unclear from the available material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-platform","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 API","USDC micropayment API","Base network API","lowpaymentfee","accounts API"],"warnings":["No OpenAPI specification or schema documentation available","All documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no technical content","The specific functionality of /api/v1/accounts/124 ('Premium API Access') is not described anywhere","No request body schema or response schema documented — integration requires trial and error"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/124","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/124","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the purpose of the specific /api/v1/accounts/124 endpoint is not explained. The listing is essentially a stub with confirmed 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'/api/v1/accounts/124':36,102 '/docs':185 '/pricing':187 '/readme':189 '0.02':12,28,87,133 '000':122 '0x8335':127 '20':121 '2913':128 '300':153 '6':137 'Base network API' 'USDC micropayment API' 'accept':110 'access':7,23,53,99,108 'account':223 'accounts API' 'across':57 'actual':218 'address':150 'advertis':84 'ai':60 'amount':119 'analysi':171 'analyt':59 'api':6,22,42,92,107 'application/json':161 'avail':216,229 'base':9,25,80,123,130 'base-network' 'behind':220 'broader':41 'call':4,20 'challeng':115 'connect':195 'data':58 'decim':138 'detail':202 'document':180,211 'embed':174 'endpoint':34,69,103,168,224 'equal':132 'exact':144 'exampl':215 'extrem':182 'feed':176 'financ':63 'flat':86 'function':219 'geocod':177 'given':134 'host':44 'indic':116 'infrastructur':66 'instant':98 'json-response' 'key':93 'label':105 'land':164 'learn':62 'limit':96 'list':166 'lowpaymentfee' 'lowpaymentfee.com':46 'machin':61 'made':141 'mani':167 'materi':230 'maximum':118 'mime':158 'network':81 'no-api-key' 'offer':48 'openapi':206 'page':165,190 'part':38 'particular':222 'pay':2,18,50 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':49 'payment':73,139 'payto':149 'per':3,13,19,29,51,88 'platform':43,83 'post':111 'post-method' 'premium':5,21,106 'premium API' 'price':175 'prompt':197 'protocol':74 'rate':95 'render':192 'request':14,30,52,89,112 'request/response':209 'respons':157 'schema':210 'scheme':145 'second':154 'sentiment':170 'servic':56 'settl':75 'span':169 'spars':183 'spec':207 'specif':101 'specifi':148 'summar':173 'technic':201 'text':172 'timeout':155 'type':159 'unclear':226 'unit':124 'usag':214 'usdc':16,32,77,126,135 'usdc-settlement' 'use':70 'util':67 'various':55 'via':10,26,142 'wallet':196 'web3':64 'x402':11,27,72,114 'x402 API' 'x402-payment'","prices":[{"id":"a392fff7-65bf-455c-b17b-fae80c65a94b","listingId":"5cd0afd9-fcc3-4582-b534-ef9e56a2cbfb","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/124","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:52.810Z"}],"sources":[{"listingId":"5cd0afd9-fcc3-4582-b534-ef9e56a2cbfb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/124","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:52.810Z","lastSeenAt":"2026-04-24T18:32:14.935Z"}],"details":{"listingId":"5cd0afd9-fcc3-4582-b534-ef9e56a2cbfb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/124 \\\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":"The platform charges $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge specifies maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with exact scheme","source_url":"https://lowpaymentfee.com/api/v1/accounts/124"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic access to account-level data behind a paywall"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","Applications requiring fiat-only payment methods","High-volume use cases where per-request pricing may be cost-inefficient compared to bulk plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:34.846Z"},"updatedAt":"2026-04-24T18:32:14.935Z"}}