{"id":"357b7747-7e0c-49e2-b7ef-a5ba7b130d3b","shortId":"dQBHUy","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. It is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories — all priced at $0.02 per request settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/accounts/31` is listed under the provider's umbrella as \"Premium API Access,\" but the crawled documentation does not clarify what data or functionality this particular path returns. The platform advertises no API keys, no rate limits, and instant access: callers simply attach an x402 payment header with each request. The x402 challenge confirms the endpoint is live, accepts POST requests, charges a maximum of 20,000 base-unit USDC (i.e., $0.02 given USDC's 6 decimals), and pays out to a specified Ethereum address on Base.\n\nBeyond the landing page, the site's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional technical documentation, schemas, or example payloads. Without further documentation it is unclear what request body the endpoint expects or what response shape it returns. Prospective callers should experiment with POST requests or contact the provider for details.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-endpoint"],"categories":["api-gateway","misc"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","pay-per-call API","USDC micropayment API","Base network API"],"warnings":["No documentation available — all doc/pricing/API pages render only 'Connect wallet' with no content.","The purpose and expected input/output of /api/v1/accounts/31 ('Premium API Access') is completely undocumented.","No OpenAPI spec, no request schema, and no response schema were found.","Cannot verify what data or service this endpoint actually provides."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/31","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/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no request/response schema, and no explanation of what the /api/v1/accounts/31 endpoint actually does. The docs, pricing, and API pages all render only a wallet-connect prompt. This is effectively a stub 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'/request':13,28 '0.02':12,27,70,154 '000':148 '20':147 '6':158 'Base network API' 'USDC micropayment API' 'accept':140 'access':7,22,38,94,121 'addit':191 'address':167 'advertis':112 'ai':58 'analyt':57 'api':6,21,37,93,114,180 'attach':124 'base':9,24,78,150,169 'base-unit':149 'beyond':170 'bodi':206 'call':4,19 'caller':122,217 'categori':66 'challeng':134 'charg':143 'clarifi':101 'confirm':135 'connect':186 'contact':224 'crawl':97 'data':56,103 'decim':159 'detail':228 'doc':177 'document':98,193,200 'endpoint':32,49,82,137,208 'ethereum':166 'exampl':196 'expect':209 'experi':219 'financ':61 'function':105 'given':155 'header':128 'i.e':153 'infrastructur':64 'instant':120 'key':115 'land':172 'learn':60 'limit':118 'list':85 'live':139 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':59 'mani':48 'maximum':145 'network':79 'no-api-key' 'offer':50 'one':46 'page':173,181 'particular':107 'path':108 'pay':2,17,161 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payload':197 'payment':42,127 'per':3,18,71 'platform':53,111 'post':141,221 'post-endpoint' 'premium':5,20,36,92 'price':68,178 'prompt':188 'prospect':216 'protocol':43 'provid':35,88,226 'rate':117 'render':183 'request':72,131,142,205,222 'respons':212 'return':109,215 'schema':194 'settl':73 'shape':213 'simpli':123 'site':175 'span':55 'specif':81 'specifi':165 'technic':192 'umbrella':90 'unclear':203 'unit':151 'usdc':15,30,75,152,156 'usdc-base' 'util':65 'via':10,25,39 'wallet':187 'web3':62 'without':198 'x402':11,26,41,126,133 'x402 premium API' 'x402-payment'","prices":[{"id":"cd022ba2-9b6d-4de7-9539-ef548319c125","listingId":"357b7747-7e0c-49e2-b7ef-a5ba7b130d3b","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/31","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:30.586Z"}],"sources":[{"listingId":"357b7747-7e0c-49e2-b7ef-a5ba7b130d3b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/31","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:30.586Z","lastSeenAt":"2026-04-22T12:03:21.442Z"}],"details":{"listingId":"357b7747-7e0c-49e2-b7ef-a5ba7b130d3b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/31 \\\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-unit USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/31"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/31"}],"useCases":["Accessing a premium API resource without needing an API key or subscription","Making one-off paid API calls settled instantly in USDC on Base","Agent-driven workflows that need frictionless per-call billing"],"bestFor":["Developers who want zero-signup, pay-as-you-go API access","AI agents with x402-compatible wallets on Base","Users who prefer crypto micropayments over traditional billing"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk pricing or rate-limit guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.731Z"},"updatedAt":"2026-04-22T12:03:21.442Z"}}