{"id":"ab252ea9-41bf-45ed-b51b-e4bb9c66b172","shortId":"f4L7Uv","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 resource `/api/v1/accounts/62` is one of many endpoints offered by the platform, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base) to address 0x1A2B…85F3. The maxAmountRequired of 20000 base units equals $0.02 (USDC uses 6 decimals). The platform advertises a broad suite of sibling endpoints covering metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more — all at the same $0.02 price point.\n\nHowever, documentation is extremely sparse. The /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no actual technical documentation, request/response schemas, or usage examples. The specific functionality of `/api/v1/accounts/62` is not described anywhere — the name \"Premium API Access\" is generic and does not clarify what data or service this particular endpoint returns. Without schemas or documentation, callers must discover behavior experimentally.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method","json-response"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README all show only 'Connect wallet' with no content","The specific purpose and response format of /api/v1/accounts/62 is completely undocumented","No OpenAPI spec, no request schema, no response schema provided","Cannot verify what data or service this endpoint actually delivers"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/62","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/62","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 there is zero documentation for this specific endpoint — no request/response schema, no examples, and no description of what /api/v1/accounts/62 actually returns. The docs pages are all empty 'Connect wallet' 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'/api/v1/accounts/62':47,198 '/docs':171 '/pricing':173 '/readme':175 '/request':13,28 '0.02':12,27,76,127,162 '0x1a2b':118 '0x8335':112 '20000':123 '2913':113 '6':130 '85f3':119 'Base network API' 'USDC API access' 'accept':103 'access':7,22,38,207 'actual':186 'address':117 'advertis':134 'ai':63 'analysi':145 'analyt':62 'anywher':202 'api':6,21,37,88,206 'base':9,24,84,115,124 'base-network' 'behavior':229 'broad':136 'call':4,19 'caller':226 'categori':59 'challeng':97 'clarifi':213 'classif':148 'commit':93 'confirm':98 'connect':181 'contract':111 'cover':141 'data':61,215 'decim':131 'describ':201 'discov':228 'document':166,188,225 'embed':149 'endpoint':32,52,72,100,140,220 'equal':126 'exampl':193 'exchang':152 'experiment':230 'extrem':168 'feed':151 'financ':66 'function':196 'generic':209 'geocod':154 'howev':165 'includ':60 'infrastructur':69 'json-response' 'key':89 'learn':65 'limit':91 'live':102 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':64 'mani':51 'maxamountrequir':121 'metric':142 'micropayment API' 'must':227 'name':204 'network':85 'no-api-key' 'offer':53 'one':49 'page':176 'particular':219 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':79 'payment':42,108 'per':3,18,77 'platform':56,133 'point':164 'post':104 'post-method' 'premium':5,20,36,205 'price':74,150,163 'prompt':183 'protocol':43 'provid':35 'rate':90,153 'render':178 'report':143 'request':78,105 'request/response':189 'requir':94 'resourc':46 'return':221 'schema':190,223 'sentiment':144 'servic':217 'settl':107 'sibl':139 'span':58 'spars':169 'specif':45,195 'suit':137 'summar':147 'technic':187 'text':146 'unit':125 'usag':192 'usdc':15,30,81,110,128 'usdc-settlement' 'use':129 'util':70 'valid':155 'via':10,25,39 'wallet':182 'web3':67 'without':222 'x402':11,26,41,96 'x402 API' 'x402-payment'","prices":[{"id":"36354987-2a65-45c2-8456-34f671c2ad53","listingId":"ab252ea9-41bf-45ed-b51b-e4bb9c66b172","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/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:56.477Z"}],"sources":[{"listingId":"ab252ea9-41bf-45ed-b51b-e4bb9c66b172","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/62","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:56.477Z","lastSeenAt":"2026-04-23T09:00:50.077Z"}],"details":{"listingId":"ab252ea9-41bf-45ed-b51b-e4bb9c66b172","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/62 \\\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, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Payment in USDC on Base network, maxAmountRequired 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/accounts/62"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium data or services with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to a multi-category API platform"],"bestFor":["Developers or agents wanting zero-signup, pay-per-call API access","x402-compatible wallets and agents on the Base network","Low-volume or experimental usage where per-request billing is preferred"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume production workloads where bulk pricing or rate guarantees are needed","Anyone unable to pay in USDC on the Base L2 network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.564Z"},"updatedAt":"2026-04-23T09:00:50.077Z"}}