{"id":"d414bd4a-a2b7-49e6-a5ad-c3137271c05c","shortId":"Fh8jHc","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific resource `/api/v1/accounts/155` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC (USD Coin) on Base.\n\nThe x402 challenge confirms the endpoint is live and accepts exact-scheme payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The `maxAmountRequired` is 20000 base units, which at 6 decimals equals $0.02. The endpoint accepts POST requests and returns `application/json`. No API keys, rate limits, or subscriptions are required — callers simply attach an x402 payment header.\n\nHowever, the specific functionality behind `/api/v1/accounts/155` is unclear. The provider's landing page lists many API categories but does not document this particular accounts endpoint. There is no OpenAPI spec, no request/response schema documentation, and the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional content. Without knowing what data or service this endpoint returns, callers should treat it as an opaque premium resource until further documentation is available.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","json-response","no-api-key","per-request-billing","post-method"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["The specific purpose and response format of /api/v1/accounts/155 is undocumented — it is unclear what data or service this endpoint provides.","No OpenAPI specification or request/response schema is available.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.","The 'accounts/155' path suggests a resource-specific endpoint but no context is given for what 'account 155' represents."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/155","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/155","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/accounts/155 is entirely undocumented. No OpenAPI spec, no request/response schemas, and all doc pages render only a wallet-connect prompt. The listing is effectively a stub with confirmed 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'0.02':10,28,86,127 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':112 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':115 '20000':119 '6':124 'Base network API' 'USDC API access' 'accept':105,130 'access':6,24,44 'account':175 'addit':202 'address':111 'ai':73 'analyt':72 'api':5,16,23,34,43,137,167,191 'application/json':135 'attach':147 'avail':226 'base':8,26,52,95,120 'base-network' 'behind':156 'caller':145,213 'categori':69,168 'challeng':98 'coin':93 'confirm':99 'connect':197 'content':203 'data':71,207 'decim':125 'doc':188 'document':172,185,224 'endpoint':38,62,82,101,129,176,211 'equal':126 'exact':107 'exact-schem':106 'financ':76 'function':155 'gate':3,21 'header':151 'howev':152 'includ':70 'infrastructur':79 'json-response' 'key':17,35,138 'know':205 'land':163 'learn':75 'limit':140 'list':165 'live':103 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':74 'mani':61,166 'maxamountrequir':117 'micropayment API' 'network':53 'no-api-key' 'offer':63 'one':59 'opaqu':219 'openapi':180 'page':164,192 'particular':174 'pay':9,27 'pay-per-call API' 'payment':48,109,150 'per':11,29,87 'per-request-billing' 'post':131 'post-method' 'premium':4,22,42,220 'price':84,189 'prompt':199 'protocol':49 'provid':41,66,161 'rate':139 'render':194 'request':12,30,88,132 'request/response':183 'requir':18,36,144 'resourc':56,221 'return':134,212 'schema':184 'scheme':108 'servic':209 'settl':89 'simpli':146 'span':68 'spec':181 'specif':55,154 'subscript':142 'treat':215 'unclear':159 'unit':121 'usd':92 'usdc':14,32,91,114 'usdc-settlement' 'use':113 'util':80 'via':45 'wallet':198 'web3':77 'without':204 'x402':2,20,47,97,149 'x402 premium API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"ab562ca8-1e66-411c-8cfd-7ad64423c8b4","listingId":"d414bd4a-a2b7-49e6-a5ad-c3137271c05c","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/155","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:16.917Z"}],"sources":[{"listingId":"d414bd4a-a2b7-49e6-a5ad-c3137271c05c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/155","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:16.917Z","lastSeenAt":"2026-04-24T08:32:01.024Z"}],"details":{"listingId":"d414bd4a-a2b7-49e6-a5ad-c3137271c05c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/155 \\\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":"All endpoints 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":"x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/155"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/155"},{"claim":"Provider lists categories: Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API resource with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API consumption on Base","Exploring x402 payment protocol integrations with minimal commitment"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that can settle USDC payments on Base automatically","Users who want no-subscription, no-API-key access to premium endpoints"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet or x402-capable client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.622Z"},"updatedAt":"2026-04-24T08:32:01.024Z"}}