{"id":"bd919e0d-f44f-498f-9559-ee4628619cd5","shortId":"ypK4Px","kind":"x402","title":"x402-gated premium API access on Base, paid per-request in USDC.","tagline":"x402-gated premium API access on Base, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 paywall. The specific resource `/api/v1/customers/24` appears to be a customer data endpoint, though the exact response payload is undocumented. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum charge of 20,000 units (likely $0.02 given the 6-decimal USDC standard and the site's advertised $0.02/request pricing).\n\nThe broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all at $0.02 per request. The platform emphasizes no API keys, no rate limits, and instant access via the x402 payment protocol.\n\nDocumentation is extremely sparse. The docs, API, pricing, 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 usage examples available from the crawl. The endpoint is confirmed live (returns a valid 402 challenge), but the actual behavior and response format of `/api/v1/customers/24` remain unknown.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","per-request-billing","no-api-key","customer-data"],"categories":["data","api-gateway"],"synonyms":["x402 API","pay-per-request API","USDC API","Base network API","lowpaymentfee","premium API","micropayment API","402 payment API"],"warnings":["No documentation available — docs, pricing, and README pages render only a wallet connect prompt","No OpenAPI or request/response schema provided for this endpoint","The specific purpose and response format of /api/v1/customers/24 is undocumented and unclear","The broader platform lists many endpoints but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/24","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/customers/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, but documentation is essentially nonexistent — docs/pricing/README pages all show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no examples. The purpose of /api/v1/customers/24 specifically is unclear beyond the generic 'Premium API Access' 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'/request':92 '0.02':79,91,134 '000':76 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':69 '20':75 '402':200 '402 payment API' '6':82 'Base network API' 'USDC API' 'access':6,20,36,148 'actual':204 'advertis':90,98 'ai/ml':109 'analysi':111 'analyt':108 'api':5,19,35,105,141,160 'appear':45 'avail':188 'base':8,22,64 'base-network' 'behavior':205 'behind':37 'broader':95 'challeng':201 'charg':73 'classif':113 'confirm':195 'connect':169 'content':175 'contract':68 'convers':130 'crawl':191 'custom':49 'customer-data' 'data':50,107 'decim':83 'doc':159 'document':154 'embed':114 'emphas':139 'endpoint':30,51,193 'estim':124 'exact':54 'exampl':187 'exchang':119 'extrem':156 'feed':118 'financ':115 'format':208 'gas':123 'gate':3,17,104 'generat':131 'geocod':128 'given':80 'infrastructur':126 'instant':147 'key':142 'like':78 'limit':145 'live':196 'lowpaymentfee' 'lowpaymentfee.com':32,96 'maximum':72 'micropayment API' 'network':65 'no-api-key' 'openapi':179 'page':164 'paid':9,23 'pay-per-request API' 'payload':56 'payment':59,152 'paywal':40 'per':11,25,135 'per-request':10,24 'per-request-billing' 'platform':97,138 'premium':4,18,34 'premium API' 'price':93,117,161 'prompt':171 'protocol':153 'provid':33 'quot':122 'rate':120,144 'readm':163 'remain':211 'render':166 'request':12,26,136 'request/response':182 'resourc':43 'respons':55,207 'return':197 'schema':183 'sentiment':110 'settl':61 'site':88 'span':106 'spars':157 'spec':180 'specif':42 'standard':85 'suit':100 'summar':112 'though':52 'token':121 'undocu':58 'unit':77 'unknown':212 'usag':186 'usdc':14,28,67,84 'usdc-payment' 'use':66 'util':127 'valid':129,199 'via':149 'wallet':170 'web3':116 'x402':2,16,39,103,151 'x402 API' 'x402-gated':1,15,102 'x402-payment'","prices":[{"id":"fb79a90a-02bf-4524-a43c-adcea18495d2","listingId":"bd919e0d-f44f-498f-9559-ee4628619cd5","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/customers/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:17.180Z"}],"sources":[{"listingId":"bd919e0d-f44f-498f-9559-ee4628619cd5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/24","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:17.180Z","lastSeenAt":"2026-04-24T13:31:32.277Z"}],"details":{"listingId":"bd919e0d-f44f-498f-9559-ee4628619cd5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/24 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 402 challenge with USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/customers/24"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/customers/24"},{"claim":"Docs, pricing, and README pages show only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing customer data records via per-request USDC micropayments","Integrating pay-as-you-go API calls into agent workflows without API key management","Programmatic data retrieval settled on Base L2"],"bestFor":["Developers wanting keyless, pay-per-call API access","AI agents with x402 payment capability on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integration","High-volume use cases where $0.02/request adds up significantly","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:00.094Z"},"updatedAt":"2026-04-24T13:31:32.277Z"}}