{"id":"04d6af5e-23fa-48ef-8c75-25dbdd3d7667","shortId":"XQ3Ygw","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. The specific resource path `/api/v1/benefits/68` is not individually described on the provider's site, but the site hosts a broad catalog of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base). The max amount required is 20,000 base units, which at 6 decimals equals $0.02. Payment is made via the x402 exact scheme with no API keys or rate limits required — callers simply attach an X-PAYMENT header with a valid payment proof.\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 description of what `/api/v1/benefits/68` specifically returns. The endpoint's purpose must be inferred entirely from its title (\"Premium API Access\") and the broader site context. Prospective callers should be aware that without documented input/output schemas, integration requires experimentation or contacting the provider.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["api","infrastructure"],"synonyms":["premium API","paid API access","x402 API","USDC API","Base network API","lowpaymentfee","micropayment API","pay-per-call API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or output schema provided for this specific endpoint","The purpose of /api/v1/benefits/68 is not described anywhere on the site","Cannot verify what data or service this endpoint actually returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/68","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/68","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the specific purpose of /api/v1/benefits/68 is undocumented. This is effectively a stub 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'0.02':10,24,86,124 '000':116 '0x8335':106 '20':115 '2913':107 '6':121 'Base network API' 'USDC API' 'accept':97 'access':6,20,36,205 'ai':75 'amount':112 'analyt':74 'api':5,19,35,71,135,161,204 'attach':143 'awar':215 'base':8,22,43,109,117 'base-network' 'behind':37 'broad':64 'broader':208 'call':70 'caller':141,212 'catalog':65 'challeng':91 'confirm':92 'connect':169 'contact':225 'content':175 'context':210 'contract':105 'data':73 'decim':122 'describ':53 'descript':186 'doc':159 'document':154,218 'endpoint':30,94,193 'entir':199 'equal':123 'exact':131 'experiment':223 'extrem':156 'financ':78 'gate':3,17 'header':148 'host':62 'individu':52 'infer':198 'infrastructur':81 'input/output':219 'integr':221 'key':136 'learn':77 'limit':139 'live':96 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':76 'made':127 'max':111 'micropayment API' 'must':196 'network':44 'no-api-key' 'openapi':179 'page':164 'paid API access' 'path':48 'pay':9,23,68 'pay-per-cal':67 'pay-per-call API' 'pay-per-request' 'payment':102,125,147,152 'paywal':40 'per':11,25,69,87 'post':98 'post-method' 'premium':4,18,34,203 'premium API' 'price':84,160 'prompt':171 'proof':153 'prospect':211 'provid':33,56,227 'purpos':195 'rate':138 'readm':163 'render':166 'request':12,26,88,99 'request/response':182 'requir':113,140,222 'resourc':47 'return':191 'schema':183,220 'scheme':132 'settl':101 'simpli':142 'site':58,61,209 'span':72 'spars':157 'spec':180 'specif':46,190 'titl':202 'unit':118 'usdc':14,28,104 'usdc-settlement' 'util':82 'valid':151 'via':128 'wallet':170 'web3':79 'without':217 'x':146 'x-payment':145 'x402':2,16,39,90,130 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"0e70dd98-4d97-4fb0-9d45-4627f14d1673","listingId":"04d6af5e-23fa-48ef-8c75-25dbdd3d7667","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/68","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:49.944Z"}],"sources":[{"listingId":"04d6af5e-23fa-48ef-8c75-25dbdd3d7667","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/68","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:49.944Z","lastSeenAt":"2026-04-22T02:31:45.122Z"}],"details":{"listingId":"04d6af5e-23fa-48ef-8c75-25dbdd3d7667","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/68 \\\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 402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/benefits/68"},{"claim":"All listed APIs on the site are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/68"}],"useCases":["Accessing a premium API endpoint without traditional API key registration","Making one-off paid API calls settled in USDC on Base","Agent-driven programmatic access to gated resources via x402 protocol"],"bestFor":["Developers who want keyless, pay-per-use API access","AI agents that can settle x402 payments on Base","Users comfortable with USDC micropayments for API calls"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.766Z"},"updatedAt":"2026-04-22T02:31:45.122Z"}}