{"id":"d898b664-a1ce-4a8c-b4a9-46e3e8a85ab7","shortId":"sdgqBs","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/107` 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 is live and returns a valid x402 challenge. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-payment scheme. The max amount required is 20,000 base units, which at 6 decimals equals $0.02 USD per call. No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header. The endpoint accepts POST requests and returns application/json.\n\nHowever, the specific functionality behind `/api/v1/accounts/107` is not documented on the provider's site — it does not appear in the listed API catalog. The crawled docs, pricing, and README pages all returned only a \"Connect wallet\" stub with no additional documentation. Without an OpenAPI spec, request/response schemas, or detailed docs, the actual behavior of this particular endpoint remains unclear. It may be an account-specific data retrieval endpoint, but this is speculative.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","no-rate-limit"],"categories":["api","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["The endpoint /api/v1/accounts/107 does not appear in the provider's listed API catalog — its specific functionality is undocumented.","All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' stub with no usable content.","No OpenAPI spec, request schema, or response schema is available — integration requires trial and error.","The provider site lists many endpoints but provides no detailed documentation for any of them."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/107","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/107","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, the specific path /api/v1/accounts/107 is not documented anywhere on the provider's site, there is no OpenAPI spec, no request/response schema, and all doc pages return only a wallet-connect stub. The actual functionality is 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'/request':13,28 '0.02':12,27,76,121 '000':113 '0x8335':99 '20':112 '2913':100 '6':118 'Base network API' 'USDC micropayment API' 'accept':148 'access':7,22,38,133 'account':218 'account-specif':217 'actual':205 'addit':193 'advertis':132 'ai':65 'amount':109 'analyt':64 'api':6,21,37,126,175 'appear':171 'application/json':153 'base':9,24,94,114 'behavior':206 'behind':158 'broad':60 'call':4,19,124 'catalog':61,176 'challeng':88 'connect':188 'contract':98 'crawl':178 'data':63,220 'decim':119 'detail':202 'doc':179,203 'document':162,194 'endpoint':32,52,80,147,210,222 'equal':120 'exact':104 'exact-pay':103 'financ':68 'function':157 'header':145 'host':58 'howev':154 'includ':139 'infrastructur':71 'instant':135 'json-response' 'key':127 'learn':67 'limit':130 'list':174 'live':82 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':66 'mani':51 'max':108 'may':214 'network':95 'no-api-key' 'no-rate-limit' 'offer':53 'one':49 'openapi':197 'page':183 'particular':209 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,89,105,137,144 'per':3,18,77,123 'post':149 'premium':5,20,36 'premium API' 'price':74,180 'protocol':43 'provid':35,56,165 'rate':129 'readm':182 'remain':211 'request':78,150 'request/response':199 'requir':110 'retriev':221 'return':84,152,185 'schema':200 'scheme':106 'settl':91 'site':167 'span':62 'spec':198 'specif':45,156,219 'specul':226 'stub':190 'unclear':212 'unit':115 'usd':122 'usdc':15,30,97 'usdc-base-network' 'use':96 'util':72 'valid':86 'via':10,25,39 'wallet':189 'web3':69 'without':195 'x':143 'x-payment':142 'x402':11,26,41,87 'x402 endpoint' 'x402-payment'","prices":[{"id":"e1b7de13-8000-4849-86c7-38b66e62d2c6","listingId":"d898b664-a1ce-4a8c-b4a9-46e3e8a85ab7","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/107","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:37.060Z"}],"sources":[{"listingId":"d898b664-a1ce-4a8c-b4a9-46e3e8a85ab7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/107","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:37.060Z","lastSeenAt":"2026-04-22T17:01:12.856Z"}],"details":{"listingId":"d898b664-a1ce-4a8c-b4a9-46e3e8a85ab7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/107 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units on Base network using USDC","source_url":"https://lowpaymentfee.com/api/v1/accounts/107"},{"claim":"The provider advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/107"},{"claim":"Documentation, pricing, README, and API pages all returned only a 'Connect wallet' stub","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium data or services with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic account data retrieval (speculative for this specific path)"],"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","Anyone without a Base-compatible USDC wallet","High-volume use cases where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:35.594Z"},"updatedAt":"2026-04-22T17:01:12.856Z"}}