{"id":"1e292ad0-e7ba-468f-b14b-185154757d16","shortId":"Kc8dE7","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\" behind an x402 paywall on the Base network. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a catalog of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request settled in USDC on Base.\n\nThe specific resource `/api/v1/benefits/70` is listed under the title \"Premium API Access\" but the crawled material does not clarify what data or functionality this particular endpoint returns. The x402 challenge confirms the endpoint is live, accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals), and pays out to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an x402 payment header to each request.\n\nDocumentation is extremely sparse. The /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no examples available. Prospective callers should be aware that the actual response payload and expected request body for this endpoint are undocumented.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-settlement","base-network","no-api-key","post-method"],"categories":["api-gateway","payments"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC micropayment API","lowpaymentfee","Base network API","402 payment API"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all render only 'Connect wallet' with no content.","The purpose and response schema of /api/v1/benefits/70 are completely unknown; 'Premium API Access' is not descriptive.","No OpenAPI or machine-readable schema is published.","Cannot verify what data or service this endpoint provides."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/70","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/70","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 zero documentation on what the endpoint actually does, what request body it expects, or what it returns. The title 'Premium API Access' is generic and uninformative. No OpenAPI spec, no examples, and all doc pages are 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'/api/v1/benefits/70':91 '/docs':176 '/pricing':177 '/readme':180 '0.02':10,24,80,137 '000':131 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':148 '20':130 '402 payment API' '6':141 'Base network API' 'USDC micropayment API' 'accept':123 'access':6,20,36,99,160 'actual':212 'address':147 'advertis':151 'ai':69 'analyt':68 'api':5,19,35,65,98,153 'attach':163 'avail':204 'awar':209 'base':8,22,43,87,132 'base-network' 'behind':37 'bodi':218 'call':64 'caller':161,206 'catalog':59 'challeng':117 'charg':126 'clarifi':106 'confirm':118 'connect':186 'content':192 'crawl':102 'data':67,108 'decim':142 'document':171 'endpoint':30,50,113,120,221 'exampl':203 'expect':216 'extrem':173 'financ':72 'function':110 'gate':3,17 'given':138 'header':167 'host':57 'i.e':136 'infrastructur':75 'instant':159 'key':154 'learn':71 'limit':157 'list':93 'live':122 'lowpaymentfee' 'lowpaymentfee.com':32,54 'machin':70 'mani':49 'materi':103 'maximum':128 'network':44 'no-api-key' 'offer':51 'one':47 'openapi':196 'page':181 'particular':112 'pay':9,23,62,144 'pay-per-cal':61 'pay-per-call API' 'payload':214 'payment':166 'paywal':40 'per':11,25,63,81 'per-request-billing' 'platform':55,150 'post':124 'post-method' 'premium':4,18,34,97 'premium API' 'price':78 'prompt':188 'prospect':205 'provid':33 'rate':156 'render':183 'request':12,26,82,125,170,217 'request/response':199 'resourc':90 'respons':213 'return':114 'schema':200 'settl':83 'simpli':162 'span':66 'spars':174 'spec':197 'specif':89 'titl':96 'undocu':223 'unit':133 'usdc':14,28,85,135,139 'usdc-settlement' 'util':76 'wallet':187 'web3':73 'x402':2,16,39,116,165 'x402 endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"1e04c150-2ce2-4382-ab09-81c81b20fea2","listingId":"1e292ad0-e7ba-468f-b14b-185154757d16","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T20:29:38.909Z"}],"sources":[{"listingId":"1e292ad0-e7ba-468f-b14b-185154757d16","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/70","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T20:29:38.909Z","lastSeenAt":"2026-04-22T01:01:59.358Z"}],"details":{"listingId":"1e292ad0-e7ba-468f-b14b-185154757d16","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/70 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/benefits/70"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/70"},{"claim":"Docs, pricing, API, and README pages show only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a premium API resource with per-call USDC micropayments on Base","Integrating x402-compatible agents that pay per request without API key management","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need keyless, pay-per-call API access on Base","Low-volume callers who want no subscription or commitment"],"notFor":["Users who need detailed API documentation or response schemas before integrating","High-volume production workloads requiring SLA guarantees","Callers who cannot settle payments in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.399Z"},"updatedAt":"2026-04-22T01:01:59.358Z"}}