{"id":"2dcf2140-9b39-4319-9e53-7f68422bc082","shortId":"YbWey8","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/151` 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 endpoint is live and returns a valid x402 challenge on POST. Payment is settled in USDC (contract 0x8335…2913) on the Base network using the \"exact\" scheme. The max amount required is 20,000 base units, which at 6 decimals for USDC equals $0.02. No API keys or rate limits are advertised; access is granted per-call upon payment. The timeout for payment settlement is 300 seconds.\n\nDocumentation is extremely sparse. The crawled /docs, /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema beyond the x402 outputSchema stub, and no description of what the `/api/v1/accounts/151` 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/151\" resource is unknown — it could be account data retrieval, but this is speculative.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","post-method"],"categories":["api-marketplace","finance"],"synonyms":["low payment fee API","x402 API","USDC pay-per-call","Base network API","micropayment API","accounts endpoint"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all return only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific purpose of /api/v1/accounts/151 is unknown; 'Premium API Access' is the only description","No examples of successful responses are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/151","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/151","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, but there is virtually no documentation: no OpenAPI spec, no request/response examples, no description of what the accounts/151 resource actually provides. All doc pages return only 'Connect wallet'. This is effectively a stub 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'/api/v1/accounts/151':47,192 '/docs':156 '/pricing':158 '/readme':160 '/request':13,28 '0.02':12,27,78,125 '000':115 '0x8335':99 '20':114 '2913':100 '300':148 '6':120 'Base network API' 'USDC pay-per-call' 'access':7,22,38,134 'account':230 'accounts endpoint' 'accounts/151':223 'advertis':60,133 'ai':67 'amount':111 'analyt':66 'api':6,21,37,127 'appear':48 'base':9,24,103,116 'beyond':181 'broad':62 'call':4,19,139 'catalog':63 'challeng':90 'connect':166 'content':172 'contract':98 'could':228 'crawl':155 'data':65,231 'decim':121 'descript':188 'detail':207 'document':150 'endpoint':32,54,82,193,203 'equal':124 'exact':107,219 'extrem':152 'financ':70 'format':213 'grant':136 'infrastructur':73 'input':209 'json-response' 'key':128 'land':199 'learn':69 'limit':131 'list':201 'live':84 'low payment fee API' 'lowpaymentfee.com':34 'machin':68 'mani':53,202 'max':110 'micropayment API' 'network':104 'offer':55 'one':51 'openapi':176 'outputschema':184 'page':161,200 'paramet':210 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-request' 'payment':42,93,141,145 'per':3,18,79,138 'per-cal':137 'platform':58,197 'post':92 'post-method' 'premium':5,20,36 'price':76 'prompt':168 'protocol':43 'provid':35,205 'purpos':220 'rate':130 'request':80 'request/response':179 'requir':112 'resourc':224 'respons':212 'retriev':232 'return':86,163,195 'schema':180 'scheme':108 'second':149 'settl':95 'settlement':146 'span':64 'spars':153 'spec':177 'specif':45,194 'specul':236 'stub':185 'substant':171 'timeout':143 'unit':117 'unknown':226 'upon':140 'usdc':15,30,97,123 'usdc-base' 'use':105 'util':74 'valid':88 'via':10,25,39 'wallet':167 'web3':71 'x402':11,26,41,89,183 'x402 API' 'x402-payment'","prices":[{"id":"556912ac-a069-4730-b597-76d6444c7904","listingId":"2dcf2140-9b39-4319-9e53-7f68422bc082","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/151","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:13.280Z"}],"sources":[{"listingId":"2dcf2140-9b39-4319-9e53-7f68422bc082","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/151","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:13.280Z","lastSeenAt":"2026-04-23T07:30:58.499Z"}],"details":{"listingId":"2dcf2140-9b39-4319-9e53-7f68422bc082","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/151 \\\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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/151"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/151"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) contain only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium account data via a single micropayment without API key registration","Programmatic pay-per-call access from AI agents using x402 on Base","Exploring a low-friction API marketplace with no subscription commitment"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer no rate limits and no API key management"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk pricing or subscription discounts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.86Z"},"updatedAt":"2026-04-23T07:30:58.499Z"}}