{"id":"54961535-9cba-4c19-a22d-d70a11052cce","shortId":"9RsBLY","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 site hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI & machine learning (sentiment analysis, 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, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/wire/78` is listed as \"Premium API Access\" with a max amount of 20,000 base units of USDC (0.02 USDC = $0.02). It accepts POST requests and returns application/json. Payment is handled via the x402 exact scheme — no API keys, no rate limits, and no subscriptions are required. You simply attach an X-PAYMENT header with a valid x402 payment proof.\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 schema, no request/response examples, and no description of what this particular wire/78 endpoint actually returns. The site's landing page confirms the pricing model and lists available API categories, but does not explain what `/api/v1/wire/78` specifically does versus the other named endpoints. Treat this as a low-documentation endpoint where the actual functionality behind \"Premium API Access\" is unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","http-post"],"categories":["api-marketplace","crypto"],"synonyms":["lowpaymentfee","low payment fee API","x402 API","USDC pay-per-call","Base network API","micropayment API","premium API access"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","The specific functionality of /api/v1/wire/78 ('Premium API Access') is undefined — it is unclear what data or service it provides","No OpenAPI schema, no request body schema, and no response examples are available","No robots.txt or agents.txt found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/78","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/78","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what this specific endpoint actually does. The docs pages are empty. This is effectively a stub 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'/request':13,28 '0.02':12,27,89,120,122 '000':115 '20':114 'Base network API' 'USDC pay-per-call' 'accept':124 'access':7,22,38,108,246 'actual':202,241 'ai':59 'amount':112 'analysi':63 'analyt':58 'api':6,21,37,55,107,139,169,216,245 'application/json':129 'attach':151 'avail':215 'base':9,24,97,116 'behind':243 'broad':48 'call':4,19 'catalog':49 'categori':217 'classif':65 'confirm':209 'connect':178 'content':184 'convers':82 'data':57 'descript':195 'doc':168 'document':163,237 'embed':66 'endpoint':32,85,101,201,230,238 'estim':76 'exact':136 'exampl':192 'exchang':71 'explain':221 'extrem':165 'feed':70 'financ':67 'function':242 'gas':75 'generat':83 'geocod':80 'handl':132 'header':156 'host':46 'http-post' 'infrastructur':78 'json-response' 'key':140 'land':207 'learn':61 'limit':143 'list':104,214 'low':236 'low payment fee API' 'low-document':235 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':60 'max':111 'micropayment API' 'model':212 'name':229 'network':98 'openapi':188 'page':173,208 'particular':199 'pay':2,17,52 'pay-per-cal':1,16 'pay-per-request':51 'payment':42,130,155,161 'per':3,18,53,90 'post':125 'premium':5,20,36,106,244 'premium API access' 'price':69,87,170,211 'prompt':180 'proof':162 'protocol':43 'provid':35 'quot':74 'rate':72,142 'readm':172 'render':175 'request':54,91,126 'request/response':191 'requir':148 'return':128,203 'schema':189 'scheme':137 'sentiment':62 'settl':92 'simpli':150 'site':45,205 'span':56 'spars':166 'specif':100,224 'subscript':146 'summar':64 'token':73 'treat':231 'unclear':248 'unit':117 'usdc':15,30,94,119,121 'usdc-base' 'util':79 'valid':81,159 'versus':226 'via':10,25,39,133 'wallet':179 'web3':68 'wire/78':200 'x':154 'x-payment':153 'x402':11,26,41,135,160 'x402 API' 'x402-payment'","prices":[{"id":"dcada52f-98d7-4f15-909f-2450ea443e57","listingId":"54961535-9cba-4c19-a22d-d70a11052cce","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/78","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:15.556Z"}],"sources":[{"listingId":"54961535-9cba-4c19-a22d-d70a11052cce","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/78","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:15.556Z","lastSeenAt":"2026-04-22T12:04:50.719Z"}],"details":{"listingId":"54961535-9cba-4c19-a22d-d70a11052cce","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/78 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network","source_url":"https://lowpaymentfee.com/api/v1/wire/78"},{"claim":"Site offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic pay-per-call API access without API keys or subscriptions","Agent-driven workflows that need on-demand API calls settled in USDC on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers exploring x402 payment protocol","Agents needing keyless, pay-per-request API access","Users who want to avoid subscription commitments for occasional API calls"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume use cases where $0.02/request adds up significantly","Anyone who needs to know exactly what the endpoint returns before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:29.833Z"},"updatedAt":"2026-04-22T12:04:50.719Z"}}