{"id":"2100698a-99ae-48bd-b8cd-d75f3b275468","shortId":"6JUfGv","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $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/item/22` is one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.\n\nThe endpoint is live and returns a valid x402 challenge. Payment is settled on the Base network using USDC (contract 0x8335…2913) with an exact-payment scheme. The maximum amount required is 20,000 base units, which at 6 decimals equals $0.02 USD per call. The endpoint accepts HTTP POST requests and returns application/json. No API keys or rate limits are advertised; access is gated purely by the x402 micropayment.\n\nHowever, the specific functionality behind `/api/v1/item/22` is not documented — the provider's site lists many named endpoints (metrics, reports, sentiment analysis, summarization, etc.) but this particular path (`/item/22`) does not appear among them. It may be a generic or unlisted resource. Without documentation, request schema, or example responses for this specific path, the actual data returned is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","http-post"],"categories":["api","misc"],"synonyms":["premium API","x402 endpoint","micropayment API","pay-per-call","USDC API","Base network API","lowpaymentfee"],"warnings":["The path /api/v1/item/22 does not appear in the provider's listed API catalog — its specific functionality is unknown.","No request or response schema is available for this endpoint.","Provider documentation pages (/docs, /api, /pricing, /README) are effectively empty, showing only 'Connect wallet'.","The actual data or service behind this endpoint cannot be verified without making a paid request."],"endpointUrl":"https://lowpaymentfee.com/api/v1/item/22","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/item/22","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but the specific resource /api/v1/item/22 is undocumented — no request schema, no response schema, no examples, and no description beyond the generic 'Premium API Access' label. The provider's docs, pricing, and API pages all render only a 'Connect wallet' prompt with no useful 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'/item/22':177 '/request':13,28 '0.02':12,27,76,121 '000':113 '0x8335':99 '20':112 '2913':100 '6':118 'Base network API' 'USDC API' 'accept':127 'access':7,22,38,142 'actual':203 'advertis':141 'ai':65 'among':181 'amount':109 'analysi':170 'analyt':64 'api':6,21,37,135 'appear':180 'application/json':133 'base':9,24,94,114 'behind':154 'broad':60 'call':4,19,124 'catalog':61 'challeng':88 'contract':98 'data':63,204 'decim':119 'document':158,192 'endpoint':32,52,80,126,166 'equal':120 'etc':172 'exact':104 'exact-pay':103 'exampl':196 'financ':68 'function':153 'gate':144 'generic':187 'host':58 'howev':150 'http':128 'http-post' 'infrastructur':71 'json-response' 'key':136 'learn':67 'limit':139 'list':163 'live':82 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':66 'mani':51,164 'maximum':108 'may':184 'metric':167 'micropay':149 'micropayment API' 'name':165 'network':95 'offer':53 'one':49 'particular':175 'path':176,201 'pay':2,17 'pay-per-cal':1,16 'pay-per-call' 'pay-per-request' 'payment':42,89,105 'per':3,18,77,123 'post':129 'premium':5,20,36 'premium API' 'price':74 'protocol':43 'provid':35,56,160 'pure':145 'rate':138 'report':168 'request':78,130,193 'requir':110 'resourc':46,190 'respons':197 'return':84,132,205 'schema':194 'scheme':106 'sentiment':169 'settl':91 'site':162 'span':62 'specif':45,152,200 'summar':171 'unit':115 'unknown':207 'unlist':189 'usd':122 'usdc':15,30,97 'usdc-base' 'use':96 'util':72 'valid':86 'via':10,25,39 'web3':69 'without':191 'x402':11,26,41,87,148 'x402 endpoint' 'x402-payment'","prices":[{"id":"ab2feb8b-8be9-4ed2-bf49-adf160b3f1b3","listingId":"2100698a-99ae-48bd-b8cd-d75f3b275468","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/item/22","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:06.437Z"}],"sources":[{"listingId":"2100698a-99ae-48bd-b8cd-d75f3b275468","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/item/22","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:06.437Z","lastSeenAt":"2026-04-22T13:30:29.539Z"}],"details":{"listingId":"2100698a-99ae-48bd-b8cd-d75f3b275468","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/item/22 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units on Base using USDC","source_url":"https://lowpaymentfee.com/api/v1/item/22"},{"claim":"The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The provider lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a pay-per-call API endpoint without needing API keys or subscriptions","Programmatic micropayment-gated data retrieval on the Base network","Agent-driven API consumption using x402 protocol"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over traditional billing"],"notFor":["Users needing detailed documentation or guaranteed SLAs for the /item/22 path","Anyone without a Base-network USDC wallet","High-volume consumers who need bulk pricing or rate guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:48.884Z"},"updatedAt":"2026-04-22T13:30:29.539Z"}}