{"id":"40bf776c-a973-4ab4-b7e8-0f4dcd8643e5","shortId":"rfdXsm","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/152` 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. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a max amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment scheme is \"exact,\" meaning each request requires a one-time micropayment. No API keys, rate limits, or subscriptions are needed — callers simply attach an X-PAYMENT header with a valid payment proof.\n\nThe platform's documentation pages are essentially empty (showing only \"Connect wallet\"), so the actual response schema and detailed behavior of this specific `/accounts/152` endpoint are unknown. The landing page lists sibling endpoints for analytics, AI inference, finance data, geocoding, and more, but no OpenAPI spec or detailed docs were found. The endpoint accepts POST requests and returns `application/json`.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 micropayment API","USDC pay-per-call","Base network API","premium API access"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","The specific purpose of /api/v1/accounts/152 is not documented; 'Premium API Access' is generic","All documentation pages (docs, pricing, API, README) are effectively empty","No example requests or responses available to verify endpoint behavior"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/152","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/152","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, but there is no OpenAPI spec, no documentation, no request/response schema, and the actual purpose of the /accounts/152 path is unclear. The docs, pricing, API, and README pages all render only 'Connect wallet' with no useful 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'/api/v1/accounts/152':47 '/request':13,28 '0.02':12,27,78,113 '000':108 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':101 '20':107 '6':116 'Base network API' 'USDC pay-per-call' 'accept':207 'access':7,22,38 'actual':168 'advertis':60 'ai':67,189 'amount':105 'analyt':66,188 'api':6,21,37,133 'appear':48 'application/json':212 'attach':143 'base':9,24,96,109 'base-network' 'behavior':173 'broad':62 'call':4,19 'caller':141 'catalog':63 'challeng':90 'connect':164 'contract':100 'data':65,192 'decim':117 'detail':172,201 'doc':202 'document':157 'empti':161 'endpoint':32,54,82,178,186,206 'equal':112 'essenti':160 'exact':122 'financ':70,191 'found':204 'geocod':193 'header':148 'infer':190 'infrastructur':73 'json-response' 'key':134 'land':182 'learn':69 'limit':136 'list':184 'live':84 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'mani':53 'max':104 'mean':123 'micropay':131 'need':140 'network':97 'no-api-key' 'offer':55 'one':51,129 'one-tim':128 'openapi':198 'page':158,183 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-request' 'payment':42,91,119,147,152 'per':3,18,79 'platform':58,155 'post':208 'post-method' 'premium':5,20,36 'premium API access' 'price':76 'proof':153 'protocol':43 'provid':35 'rate':135 'request':80,125,209 'requir':126 'respons':169 'return':86,211 'schema':170 'scheme':120 'settl':93 'show':162 'sibl':185 'simpli':142 'span':64 'spec':199 'specif':45,176 'subscript':138 'time':130 'unit':110 'unknown':180 'usdc':15,30,99,114 'usdc-micropayment' 'use':98,115 'util':74 'valid':88,151 'via':10,25,39 'wallet':165 'web3':71 'x':146 'x-payment':145 'x402':11,26,41,89 'x402 micropayment API' 'x402-payment'","prices":[{"id":"7865c806-1915-47f4-9489-cd4e5eada8a0","listingId":"40bf776c-a973-4ab4-b7e8-0f4dcd8643e5","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/152","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:13.899Z"}],"sources":[{"listingId":"40bf776c-a973-4ab4-b7e8-0f4dcd8643e5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/152","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:13.899Z","lastSeenAt":"2026-04-23T07:30:58.517Z"}],"details":{"listingId":"40bf776c-a973-4ab4-b7e8-0f4dcd8643e5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/152 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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/152"},{"claim":"The 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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/152"},{"claim":"The platform lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data without subscriptions or API keys","Making micropayment-gated API calls from autonomous agents","Integrating pay-per-use endpoints into workflows on Base network"],"bestFor":["Agents needing keyless, pay-per-call API access","Developers who want to avoid subscription commitments","x402-compatible clients on the Base network"],"notFor":["Users who need detailed API documentation before integrating","High-volume callers who would benefit from bulk pricing or subscriptions","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.856Z"},"updatedAt":"2026-04-23T07:30:58.517Z"}}