{"id":"79dfc01c-ffb8-4d8f-80a3-89d20a8d1496","shortId":"9kpbaT","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/7` is 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 accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-payment scheme. The x402 challenge advertises a maxAmountRequired of 20,000 base units, which at 6 decimals equals $0.02 USD per call. No API keys or rate limits are required; callers simply attach the x402 payment header to each request.\n\nThe provider's landing page lists 16+ endpoints across four categories (analytics/metrics, AI inference, finance/crypto data, and utility services), all at the same $0.02 price point. However, 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 exact functionality of `/api/v1/accounts/7` (labeled \"Premium API Access\") is unclear from the available material; it may be a generic account-info or profile endpoint, but this is speculative.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["No OpenAPI specification or schema documentation available","All doc/pricing/API/README pages render only 'Connect wallet' with no content","The specific functionality of /api/v1/accounts/7 ('Premium API Access') is not documented anywhere in the crawled material","No request body schema or response schema is provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/7","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/7","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 OpenAPI spec, no documentation beyond a wallet-connect prompt, no request/response examples, and the specific purpose of /api/v1/accounts/7 is undocumented. This is effectively a stub 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'/request':13,28 '0.02':12,27,76,121,166 '000':113 '0x8335':97 '16':149 '20':112 '2913':98 '6':118 'Base network API' 'USDC API access' 'accept':81 'access':7,22,38,215 'account':228 'account-info':227 'across':151 'advertis':108 'ai':65,155 'analyt':64 'analytics/metrics':154 'api':6,21,37,126,176,214 'attach':135 'avail':206,220 'base':9,24,92,114 'broad':60 'call':4,19,124 'caller':133 'catalog':61 'categori':153 'challeng':107 'connect':185 'contract':96 'data':63,158 'decim':119 'detail':192 'doc':175 'document':170,201 'endpoint':32,52,80,150,232 'equal':120 'exact':102,208 'exact-pay':101 'exampl':205 'extrem':172 'financ':68 'finance/crypto':157 'four':152 'function':209 'generic':226 'header':139 'host':58 'howev':169 'infer':156 'info':229 'infrastructur':71 'json':86 'json-response' 'key':127 'label':212 'land':146 'learn':67 'limit':130 'list':148 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':66 'mani':51 'materi':221 'maxamountrequir':110 'may':223 'micropayment API' 'network':93 'no-api-key' 'offer':53 'one':49 'openapi':196 'page':147,180 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,87,103,138 'per':3,18,77,123 'point':168 'post':82 'post-method' 'premium':5,20,36,213 'price':74,167,177 'profil':231 'prompt':187 'protocol':43 'provid':35,56,144 'rate':129 'readm':179 'render':182 'request':78,83,142 'request/response':199 'requir':132 'return':85 'schema':200 'scheme':104 'servic':161 'settl':89 'simpli':134 'span':62 'spars':173 'spec':197 'specif':45 'specul':236 'technic':191 'unclear':217 'unit':115 'usag':204 'usd':122 'usdc':15,30,95 'usdc-base-network' 'use':94 'util':72,160 'via':10,25,39 'wallet':186 'web3':69 'x402':11,26,41,106,137 'x402 premium API' 'x402-payment'","prices":[{"id":"142beb4f-298b-4a5e-babc-5565f2d25d7f","listingId":"79dfc01c-ffb8-4d8f-80a3-89d20a8d1496","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/7","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:01.311Z"}],"sources":[{"listingId":"79dfc01c-ffb8-4d8f-80a3-89d20a8d1496","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/7","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:01.311Z","lastSeenAt":"2026-04-23T09:00:50.261Z"}],"details":{"listingId":"79dfc01c-ffb8-4d8f-80a3-89d20a8d1496","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/7 \\\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 endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/7"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers 16+ endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/7"}],"useCases":["Accessing premium API data without needing API key registration","Making one-off paid API calls settled in USDC on Base","Integrating pay-per-request endpoints into agent workflows"],"bestFor":["Developers wanting zero-signup, 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 need bulk pricing or rate-limit guarantees","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.319Z"},"updatedAt":"2026-04-23T09:00:50.261Z"}}