{"id":"6eac8257-38d8-439f-bae4-d3d584637279","shortId":"cP9SAB","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all gated via the x402 payment protocol on the Base network. The specific resource `/api/v1/generate/resource/184` is listed as \"Premium API Access\" but its exact functionality is not documented beyond that label. It accepts POST requests and returns `application/json`.\n\nPayment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The maximum amount required per call is 20,000 base units, which at 6 decimals equals $0.02 USD. The platform advertises uniform $0.02/request pricing across all endpoints, no API keys, no rate limits, and instant access. There is no OpenAPI schema, no detailed documentation, and no example request/response bodies available from the crawled pages — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content.\n\nBecause the endpoint's actual behavior (what it generates, what input it expects, what it returns) is undocumented, agents should treat this as a low-information listing. The x402 challenge is live and well-formed, confirming the endpoint is operational and accepting payments, but the lack of input/output schema means callers will need to experiment or contact the provider to understand the expected payload.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","post-method","no-api-key"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-gated endpoint"],"warnings":["No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no content.","The specific function of /api/v1/generate/resource/184 is unknown; 'Premium API Access' is the only description.","No input or output schema is provided; callers must guess or discover the expected POST body.","No examples of successful responses are available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/184","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/generate/resource/184","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint is operational at $0.02/request in USDC on Base. However, there is no OpenAPI schema, no documentation of input parameters or response format, no example payloads, and the endpoint's actual purpose ('Premium API Access' / 'resource/184') is entirely opaque. This is effectively a stub 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'/request':132 '0.02':10,28,125,131 '000':117 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':106 '20':116 '6':122 'Base network API' 'USDC micropayment API' 'accept':94,224 'access':6,24,82,145 'across':53,134 'actual':185 'advertis':129 'agent':199 'ai/ml':56 'amount':111 'analyt':55 'api':5,16,23,34,52,81,138,168 'application/json':99 'avail':159 'base':8,26,71,108,118 'behavior':186 'beyond':90 'bodi':158 'broader':45 'call':114 'caller':233 'challeng':211 'confirm':218 'connect':174 'contact':239 'content':180 'contract':105 'crawl':162 'crypto-gated endpoint' 'data':54 'decim':123 'detail':152 'doc':165 'document':89,153 'endpoint':38,136,183,220 'equal':124 'exact':85 'exampl':156 'expect':193,245 'experi':237 'finance/web3':58 'form':217 'function':86 'gate':3,21,63 'generat':189 'infer':57 'inform':207 'infrastructur':60 'input':191 'input/output':230 'instant':144 'json-api' 'key':17,35,139 'label':92 'lack':228 'limit':142 'list':78,208 'live':213 'low':206 'low-inform':205 'lowpaymentfee' 'lowpaymentfee.com':40 'maximum':110 'mean':232 'need':235 'network':72 'no-api-key' 'offer':47 'openapi':149 'oper':222 'page':163,169 'part':42 'pay':9,27,49 'pay-per-call API' 'pay-per-request':48 'payload':246 'payment':67,100,225 'per':11,29,50,113 'platform':46,128 'post':95 'post-method' 'premium':4,22,80 'premium API access' 'price':133,166 'prompt':176 'protocol':68 'provid':241 'rate':141 'render':171 'request':12,30,51,96 'request/response':157 'requir':18,36,112 'resourc':75 'return':98,196 'schema':150,231 'settl':102 'specif':74 'treat':201 'understand':243 'undocu':198 'uniform':130 'unit':119 'usd':126 'usdc':14,32,104 'usdc-base' 'util':61 'via':64 'wallet':175 'well':216 'well-form':215 'x402':2,20,66,210 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"2816840c-13ac-49fb-8aaf-517ba64ef142","listingId":"6eac8257-38d8-439f-bae4-d3d584637279","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/generate/resource/184","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:17.927Z"}],"sources":[{"listingId":"6eac8257-38d8-439f-bae4-d3d584637279","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/184","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:17.927Z","lastSeenAt":"2026-04-24T11:31:44.531Z"}],"details":{"listingId":"6eac8257-38d8-439f-bae4-d3d584637279","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/184 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Uniform $0.02/request pricing, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns 402 with maxAmountRequired 20000 in USDC (6 decimals = $0.02) on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/184"},{"claim":"USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/184"},{"claim":"Platform offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a generation endpoint with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API key management","Exploring x402 payment protocol integration on Base"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that can settle USDC payments on Base L2","Use cases where no-signup, pay-as-you-go access is preferred"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before calling","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:45.332Z"},"updatedAt":"2026-04-24T11:31:44.531Z"}}