{"id":"61f42fef-bdd7-4319-a5cb-5f0988857844","shortId":"XW76Sa","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $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/benefits/10` is one of many endpoints offered by this provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities—all priced at $0.02 per request settled in USDC on the Base network.\n\nThe endpoint accepts POST requests and returns application/json responses. Payment is handled inline via the X-PAYMENT header using the x402 \"exact\" scheme. The USDC asset contract on Base (0x8335…2913) is used, with a maxAmountRequired of 20000 base units (i.e., $0.02 given USDC's 6 decimals). No API keys or rate limits are advertised; access is instant once payment is included.\n\nThe specific functionality behind `/api/v1/benefits/10` is not documented beyond the label \"Premium API Access.\" The provider's landing page lists numerous other endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, etc.), all at the same $0.02 price point. Documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no further technical detail.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","no-rate-limit"],"categories":["api-marketplace","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["The specific functionality of /api/v1/benefits/10 is undocumented beyond the label 'Premium API Access'","No request or response schema available","Documentation pages return only 'Connect wallet' with no technical content","Cannot verify what data or service is actually delivered after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/10","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no documentation of what this specific endpoint actually returns, no request/response schema, and no examples. The docs, pricing, and README pages all resolve to a bare 'Connect wallet' 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'/request':16,34 '0.02':15,33,82,134,196 '0x8335':122 '20000':130 '2913':123 '6':138 'Base network API' 'USDC micropayment API' 'accept':94 'access':7,25,44,148,168 'advertis':147 'ai':71 'analysi':181 'analyt':70 'api':6,24,43,141,167 'application/json':99 'asset':118 'base':9,27,90,121,131 'behind':158 'beyond':163,201 'broad':66 'call':4,22 'catalog':67 'classif':183 'connect':208 'contract':119 'data':69 'decim':139 'detail':215 'document':162,199 'embed':184 'endpoint':38,58,93,177 'etc':191 'exact':114 'exchang':187 'feed':186 'financ':74 'function':157 'geocod':189 'given':135 'handl':103 'header':110 'host':64 'i.e':133 'includ':154 'infrastructur':77 'inlin':104 'instant':150 'json-response' 'key':142 'label':165 'land':172,203 'learn':73 'limit':145 'list':174 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':72 'mani':57 'maxamountrequir':128 'metric':178 'network':10,28,91 'no-api-key' 'no-rate-limit' 'numer':175 'offer':59 'one':55 'page':173,200,204 'pay':2,20 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request' 'payment':48,101,109,152 'per':3,21,83 'point':198 'post':95 'premium':5,23,42,166 'premium API' 'price':80,185,197 'prompt':210 'protocol':13,31,49 'provid':41,62,170 'rate':144,188 'report':179 'request':84,96 'resourc':52 'respons':100 'return':98,205 'scheme':115 'sentiment':180 'settl':85 'span':68 'specif':51,156 'summar':182 'technic':214 'unit':132 'usdc':18,36,87,117,136 'usdc-base' 'use':111,125 'util':78 'valid':190 'via':11,29,45,105 'wallet':209 'web3':75 'x':108 'x-payment':107 'x402':12,30,47,113 'x402 endpoint' 'x402-payment'","prices":[{"id":"dc8d96b3-a39d-4330-991a-e84878ea407f","listingId":"61f42fef-bdd7-4319-a5cb-5f0988857844","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:26.864Z"}],"sources":[{"listingId":"61f42fef-bdd7-4319-a5cb-5f0988857844","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:26.864Z","lastSeenAt":"2026-04-22T10:02:39.211Z"}],"details":{"listingId":"61f42fef-bdd7-4319-a5cb-5f0988857844","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/10 \\\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":"Endpoint returns 402 with x402 challenge advertising USDC on Base, maxAmountRequired 20000 (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/benefits/10"},{"claim":"Provider advertises $0.02/request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/10"}],"useCases":["Accessing premium data or services without subscription or API key management","Agent-driven workflows that need instant, keyless API access with crypto payment","Testing x402 protocol integrations with a low-cost endpoint"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle payments on Base in USDC","Prototyping x402 payment flows at minimal cost"],"notFor":["Users who need detailed documentation or guaranteed SLAs","Use cases requiring free or fiat-only payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.89Z"},"updatedAt":"2026-04-22T10:02:39.211Z"}}