{"id":"a4626ec6-225d-437b-a7a7-dbf922786e30","shortId":"udRyWx","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per 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 lowpaymentfee.com platform, which hosts a variety of API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/benefits/54` is listed under the title \"Premium API Access\" but the crawled material does not clarify what data or functionality this particular path returns. The x402 challenge confirms the endpoint is live, accepts POST requests, requires payment of up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, and responds with `application/json`. No OpenAPI schema, detailed documentation, or example responses were found in the crawl.\n\nThe platform advertises a simple pay-per-use model with no API keys, no rate limits, no minimums, and instant access. However, the docs, pricing, and API pages all rendered only a \"Connect wallet\" prompt with no further content, so detailed documentation is unavailable.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["api","misc"],"synonyms":["premium API","lowpaymentfee","x402 API","USDC API access","Base network API","pay-per-call API","micropayment API"],"warnings":["The specific functionality of /api/v1/benefits/54 ('Premium API Access') is not documented anywhere in the crawled material.","All documentation, pricing, and API pages render only 'Connect wallet' with no usable content.","No OpenAPI spec or output schema beyond basic HTTP method info is available.","The platform lists many endpoints but none have detailed docs; treat all claims as unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/54","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/benefits/54","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no example request/response, and the purpose of '/api/v1/benefits/54' is entirely unclear. The docs pages are empty beyond a wallet connect prompt. This is effectively a stub 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'0.02':10,24,79,139 '000':133 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':147 '20':132 '6':143 'Base network API' 'USDC API access' 'accept':124 'access':6,20,36,100,188 'address':146 'advertis':169 'ai':63 'analyt':62 'api':5,19,35,58,99,179,194 'application/json':153 'base':8,22,87,134,149 'categori':59 'challeng':118 'clarifi':107 'confirm':119 'connect':200 'content':206 'crawl':103,166 'data':61,109 'decim':144 'detail':157,208 'doc':191 'document':158,209 'endpoint':30,47,72,91,121 'exampl':160 'financ':66 'found':163 'function':111 'gate':3,17 'given':140 'host':54 'howev':189 'i.e':138 'includ':60 'infrastructur':69 'instant':187 'json-response' 'key':180 'learn':65 'limit':183 'list':94 'live':123 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':64 'mani':46 'materi':104 'micropayment API' 'minimum':185 'model':176 'network':88 'no-api-key' 'offer':48 'one':44 'openapi':155 'page':195 'particular':113 'path':114 'pay':9,23,173 'pay-per-call API' 'pay-per-request' 'pay-per-us':172 'payment':40,128 'per':11,25,80,174 'platform':52,75,168 'post':125 'post-method' 'premium':4,18,34,98 'premium API' 'price':77,192 'prompt':202 'protocol':41 'provid':33 'rate':182 'render':197 'request':12,26,81,126 'requir':127 'respond':151 'respons':161 'return':115 'schema':156 'settl':82 'simpl':171 'specif':90 'titl':97 'unavail':211 'unit':135 'usdc':14,28,84,137,141 'usdc-base' 'use':175 'util':70 'varieti':56 'via':37 'wallet':201 'web3':67 'x402':2,16,39,117 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"a673da75-3899-485f-ba90-5c72a6c0f246","listingId":"a4626ec6-225d-437b-a7a7-dbf922786e30","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/benefits/54","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:35.268Z"}],"sources":[{"listingId":"a4626ec6-225d-437b-a7a7-dbf922786e30","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/54","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:35.268Z","lastSeenAt":"2026-04-22T04:02:19.458Z"}],"details":{"listingId":"a4626ec6-225d-437b-a7a7-dbf922786e30","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/54 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/benefits/54"},{"claim":"Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/54"},{"claim":"Payment recipient address: 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/benefits/54"}],"useCases":["Accessing a premium API endpoint with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Exploring x402 payment protocol integrations"],"bestFor":["Developers experimenting with x402 pay-per-call patterns","Agents that need keyless, instant API access with crypto micropayments","Low-volume consumers who prefer no subscription commitments"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where $0.02/request adds up significantly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.457Z"},"updatedAt":"2026-04-22T04:02:19.458Z"}}