{"id":"52434a18-ca24-4a03-8303-3f23f3db5a1b","shortId":"h9pRjP","kind":"x402","title":"Pay-per-call API platform on Base via x402 — $0.02/request for data, AI, finance, and utility endpoints.","tagline":"Pay-per-call API platform on Base via x402 — $0.02/request for data, AI, finance, and utility endpoints.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of pay-per-request endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure/Utilities (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request, paid in USDC on the Base network via the x402 protocol.\n\nThe specific endpoint at `/api/v1/wire/174` is listed as \"Premium API Access\" with a max amount of 20,000 base units of USDC (0.02 USDC = $0.02), consistent with the site-wide pricing. Payment is made via the x402 exact scheme — no API keys, subscriptions, or rate limits are advertised. The platform accepts POST requests and returns JSON responses.\n\nDocumentation is extremely sparse. 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. It is unclear what specific functionality the `/api/v1/wire/174` endpoint provides beyond the generic \"Premium API Access\" label, and the relationship between this wire endpoint and the named API endpoints listed on the homepage is not documented.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","utility-apis"],"categories":["ai","data","finance","infrastructure"],"synonyms":["low payment fee","x402 api","pay per call api","micropayment api","base usdc api","cheap api access","no-auth api"],"warnings":["No documentation available — all doc/pricing/API/README pages render only 'Connect wallet'","The specific endpoint /api/v1/wire/174 has no description beyond 'Premium API Access'; its actual functionality is unknown","No OpenAPI schema or request/response examples are provided","No information about rate limits, uptime guarantees, or data sources","Relationship between /api/v1/wire/174 and the named endpoints on the homepage is unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/174","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/wire/174","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/wire/174 is undefined beyond a generic label. The broad catalog of endpoints listed on the homepage cannot be verified for 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'/request':12,31 '0.02':11,30,98,134,136 '000':129 '20':128 'accept':163 'access':122,222 'across':58 'advertis':160 'ai':15,34,68 'ai-inference' 'amount':126 'analysi':72 'analyt':62 'api':5,24,45,121,153,176,221,234 'base':8,27,106,130 'base usdc api' 'beyond':217 'broad':50 'call':4,23 'catalog':51 'categori':60 'cheap api access' 'classif':75 'classification' 'connect':185 'consist':137 'content':191 'convers':91 'data':14,33,61,65 'data-analytics' 'detail':202 'doc':175 'document':170,203,242 'embed':76 'embeddings' 'enabl':44 'endpoint':19,38,57,94,114,206,215,230,235 'estim':86 'exact':150 'exampl':199 'exchang':81 'export':66 'extrem':172 'feed':80 'financ':16,35,77 'finance-data' 'four':59 'function':212 'gas':85 'generat':92 'generic':219 'geocod':89 'geocoding' 'homepag':239 'infrastructure/utilities':88 'insight':67 'json':168 'key':154 'label':223 'learn':70 'limit':158 'list':118,236 'low payment fee' 'lowpaymentfee.com':39 'machin':69 'made':146 'max':125 'metric':63 'micropayment api' 'name':233 'network':107 'no-auth api' 'offer':48 'openapi':195 'page':180 'paid':101 'pay':2,21,54 'pay per call api' 'pay-per-cal':1,20 'pay-per-request':53 'payment':144 'per':3,22,55,99 'platform':6,25,46,162 'post':164 'premium':120,220 'price':79,96,143,177 'prompt':187 'protocol':111 'provid':216 'quot':84 'rate':82,157 'readm':179 'relationship':226 'render':182 'report':64 'request':56,100,165 'request/response':198 'respons':169 'return':167 'schema':196 'scheme':151 'sentiment':71 'sentiment-analysis' 'site':141 'site-wid':140 'spars':173 'specif':113,211 'subscript':155 'substant':190 'summar':74 'text':73 'text-summarization' 'token':83 'unclear':209 'unit':131 'usdc':103,133,135 'usdc-base' 'util':18,37 'utility-apis' 'valid':90 'via':9,28,108,147 'wallet':186 'web3':78 'wide':142 'wire':229 'x402':10,29,43,110,149 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"7abefabf-211f-43df-9eb2-5b56a51a31d7","listingId":"52434a18-ca24-4a03-8303-3f23f3db5a1b","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/wire/174","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:47.779Z"}],"sources":[{"listingId":"52434a18-ca24-4a03-8303-3f23f3db5a1b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/174","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:47.779Z","lastSeenAt":"2026-04-22T07:32:00.228Z"}],"details":{"listingId":"52434a18-ca24-4a03-8303-3f23f3db5a1b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/174 \\\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":"All endpoints priced at $0.02 per request with no minimums or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Payment in USDC on Base network, no API keys required","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units (0.02 USDC) for /api/v1/wire/174","source_url":"https://lowpaymentfee.com/api/v1/wire/174"},{"claim":"Categories include Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages show only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Agent-driven data retrieval with per-call crypto payments and no API key management","On-demand AI inference (sentiment, summarization, classification, embeddings) at $0.02/call","Fetching real-time financial data (prices, exchange rates, gas estimates) without subscriptions","Utility operations like geocoding, validation, and data conversion via micropayments"],"bestFor":["Developers or agents wanting zero-signup, pay-as-you-go API access","Low-volume or bursty workloads where per-call pricing is more economical than subscriptions","x402-compatible agents that can settle USDC payments on Base automatically"],"notFor":["High-volume production workloads where per-call costs would accumulate significantly","Users who need detailed API documentation, SLAs, or guaranteed uptime"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.216Z"},"updatedAt":"2026-04-22T07:32:00.228Z"}}