{"id":"89edecf4-e966-4362-a7da-25da3caa55db","shortId":"ARTzfh","kind":"x402","title":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","tagline":"Pay-per-request API platform on Base network via x402 — $0.02/call in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, paid in USDC on the Base network, with no API keys, no rate limits, and no commitments required. The x402 protocol handles payment inline: callers attach a payment header to each request and receive the response immediately.\n\nThe specific endpoint at `/api/v1/orders/95` is listed as \"Premium API Access\" and accepts POST requests. Its x402 challenge advertises a max amount of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. However, documentation is extremely thin: the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint, including this one. The actual behavior and response format of `/api/v1/orders/95` is unknown beyond its MIME type of `application/json`.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-base","no-api-key","json-response","post-method"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","micropayment API","pay-per-call","USDC API","Base network API","lowpaymentfee","crypto-paid API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The specific purpose of /api/v1/orders/95 is unclear; 'Premium API Access' is a generic label","No request or response examples available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/orders/95","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/orders/95","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 402 challenge, confirming it works. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty (showing only 'Connect wallet'). The purpose of '/api/v1/orders/95' specifically is unclear — it's labeled generically as 'Premium API Access' with no further detail. This is effectively a stub 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'/call':13,28 '0.02':12,27,64,139,186 '000':128 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':151 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':134 '20':127 '300':154 '6':143 'Base network API' 'USDC API' 'accept':116 'access':114 'across':50 'actual':231 'address':150 'advertis':122,160 'ai/ml':53 'amount':125 'analysi':164 'analyt':52 'api':5,20,37,76,113,196 'application/json':245 'asset':133 'attach':92 'base':8,23,72,129,136 'behavior':232 'beyond':240 'broad':42 'broader':158 'caller':91 'catalog':43 'challeng':121 'classif':167 'commit':83 'connect':205 'content':211 'convers':179 'crypto-paid API' 'data':51 'decim':144 'detail':222 'doc':195 'document':190,223 'embed':168 'enabl':36 'endpoint':49,60,106,161,226 'equal':138 'estim':176 'exampl':219 'exchang':171 'extrem':192 'feed':170 'finance/web3':55 'format':235 'gas':175 'generat':181 'geocod':177 'given':140 'handl':88 'header':95 'howev':189 'immedi':103 'includ':227 'infer':54 'infrastructur':57 'inlin':90 'json-response' 'key':77 'limit':80 'list':110 'lowpaymentfee' 'lowpaymentfee.com':31 'max':124 'micropayment API' 'mime':242 'network':9,24,73 'no-api-key' 'offer':40 'one':229 'openapi':215 'page':200 'paid':67 'pay':2,17,46 'pay-per-call' 'pay-per-request':1,16,45 'payment':89,94,146 'per':3,18,47,65 'platform':6,21,38,159 'point':188 'post':117 'post-method' 'premium':112 'price':62,169,187,197 'prompt':207 'protocol':87 'quot':174 'rate':79,172 'readm':199 'receiv':100 'render':202 'request':4,19,48,66,98,118 'request/response':218 'requir':84 'respons':102,234 'schema':216 'second':155 'sent':148 'sentiment':163 'specif':105 'substant':210 'summar':166 'text':165 'thin':193 'timeout':156 'token':173 'type':243 'unit':130 'unknown':239 'usdc':15,30,69,132,141 'usdc-base' 'util':58 'valid':178 'via':10,25 'wallet':206 'x402':11,26,35,86,120 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"0b1bcfdf-9582-468e-b5f3-599b86fb3f92","listingId":"89edecf4-e966-4362-a7da-25da3caa55db","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/orders/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:52.189Z"}],"sources":[{"listingId":"89edecf4-e966-4362-a7da-25da3caa55db","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/orders/95","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:52.189Z","lastSeenAt":"2026-04-25T06:02:53.835Z"}],"details":{"listingId":"89edecf4-e966-4362-a7da-25da3caa55db","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/orders/95 \\\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":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/orders/95"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API data without needing API key registration","Making one-off API calls paid directly in USDC on Base","Agent-driven workflows that need instant, keyless API access"],"bestFor":["Developers who want zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users already holding USDC on Base network"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","Anyone without USDC on Base or an x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:52.399Z"},"updatedAt":"2026-04-25T06:02:53.835Z"}}