{"id":"a6cf3ac5-1baa-4732-bece-1a315e4d04df","shortId":"BqBLyg","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/charges/103` is one of many endpoints offered by the provider, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform share a uniform $0.02-per-request pricing model settled in USDC (USD Coin) on Base.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is made via the x402 \"exact\" scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a max amount of 20,000 base units of USDC (6 decimals), equaling $0.02. The response MIME type is `application/json`. The platform advertises no API keys, no rate limits, and instant access.\n\nHowever, the specific functionality behind `/api/v1/charges/103` is not documented — the title \"Premium API Access\" is generic and does not describe what data or computation this particular endpoint returns. The provider's docs, pricing, and API pages all rendered as empty \"Connect wallet\" stubs, so no detailed schema, request/response examples, or endpoint-specific documentation is available. The broader site lists many other endpoints (analytics, AI, finance, utilities) but this specific charge ID is not among them, making its purpose unclear.","tags":[],"capabilities":["x402-payment","usdc-on-base","per-request-pricing","json-response","post-method"],"categories":["api","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API access"],"warnings":["The specific endpoint /api/v1/charges/103 is not listed among the provider's documented APIs — its purpose is unknown.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' stub with no useful content.","No request or response schema is available; callers cannot know what to send or expect back.","The generic title 'Premium API Access' does not describe the endpoint's actual functionality."],"endpointUrl":"https://lowpaymentfee.com/api/v1/charges/103","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/charges/103","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/charges/103 is undocumented. No request/response schema, no docs beyond a landing page listing other endpoints, and the docs/pricing/API pages are empty wallet-connect stubs. Effectively a stub 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'0.02':10,24,81,131 '000':123 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':116 '20':122 '6':128 'Base network API' 'USDC micropayment endpoint' 'accept':103 'access':6,20,36,149,163 'address':115 'advertis':140 'ai':65,214 'among':224 'amount':120 'analyt':64,213 'api':5,19,35,142,162,184 'application/json':137 'avail':205 'base':8,22,43,93,124 'behind':37,154 'broader':207 'categori':61 'challeng':96 'charg':220 'coin':91 'comput':173 'confirm':97 'connect':190 'data':63,171 'decim':129 'describ':169 'detail':195 'doc':181 'document':158,203 'empti':189 'endpoint':30,54,74,99,176,201,212 'endpoint-specif':200 'equal':130 'exact':112 'exampl':198 'financ':68,215 'function':153 'gate':3,17 'generic':165 'howev':150 'id':221 'includ':62 'infrastructur':71 'instant':148 'json-response' 'key':143 'learn':67 'limit':146 'list':209 'live':101 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':66 'made':108 'make':226 'mani':53,210 'max':119 'mime':134 'model':86 'network':44 'offer':55 'one':51 'page':185 'particular':175 'path':48 'pay':9,23 'pay-per-call API' 'payment':106 'paywal':40 'per':11,25,83 'per-request':82 'per-request-pricing' 'platform':77,139 'post':104 'post-method' 'premium':4,18,34,161 'premium API access' 'price':85,182 'provid':33,58,179 'purpos':228 'rate':145 'render':187 'request':12,26,84,105 'request/response':197 'resourc':47 'respons':133 'return':177 'schema':196 'scheme':113 'settl':87 'share':78 'site':208 'span':60 'specif':46,152,202,219 'stub':192 'titl':160 'type':135 'unclear':229 'uniform':80 'unit':125 'usd':90 'usdc':14,28,89,127 'usdc-on-base' 'util':72,216 'via':109 'wallet':191 'web3':69 'x402':2,16,39,95,111 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"cdffca60-98c8-497a-ad87-048a7c656cce","listingId":"a6cf3ac5-1baa-4732-bece-1a315e4d04df","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/charges/103","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:44:07.967Z"}],"sources":[{"listingId":"a6cf3ac5-1baa-4732-bece-1a315e4d04df","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/charges/103","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:44:07.967Z","lastSeenAt":"2026-04-22T13:30:56.715Z"}],"details":{"listingId":"a6cf3ac5-1baa-4732-bece-1a315e4d04df","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/charges/103 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/charges/103"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/charges/103"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Provider lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Paying per-request for API access without API keys or subscriptions","Agent-driven API consumption with automatic x402 payment negotiation","Accessing premium data or services via USDC micropayments on Base"],"bestFor":["Developers or agents wanting keyless, pay-per-use API access","x402-compatible clients on the Base network","Low-cost micropayment API consumption at $0.02/call"],"notFor":["Users needing detailed documentation or guaranteed SLAs before purchasing","Use cases requiring known, well-documented response schemas","High-volume batch processing where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:25.263Z"},"updatedAt":"2026-04-22T13:30:56.715Z"}}