{"id":"c5261f15-9fa0-43e3-942e-cef726e71fc4","shortId":"6Sd9MF","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/ML inference (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, payable in USDC on the Base network with no API keys, no rate limits, and no minimum commitments.\n\nThe specific endpoint `/api/v1/wire/194` is listed as \"Premium API Access\" and accepts HTTP POST requests. The x402 challenge confirms it is live, requesting up to 20,000 base units of USDC (0.02 USDC, i.e., $0.02) per call, settled to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The response MIME type is `application/json`.\n\nDocumentation is extremely sparse — the docs, pricing, API, 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 the `/api/v1/wire/194` endpoint specifically returns or what input it expects beyond a POST body. The site's landing page lists many API categories but does not map individual wire IDs to specific functionality. As a result, the exact capability behind this endpoint 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 premium API","USDC pay-per-call","Base network API","micropayment API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","The specific functionality of /api/v1/wire/194 is not described anywhere in the crawled content","No OpenAPI or JSON schema for request or response bodies","No request/response examples available","Cannot verify what data or service this endpoint actually provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/194","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/194","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 with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific functionality behind /api/v1/wire/194 is unknown. The docs/pricing/README pages are all empty beyond a wallet connect 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'/request':13,28 '0.02':12,27,88,140,143 '000':135 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':149 '20':134 'Base network API' 'USDC pay-per-call' 'accept':120 'access':7,22,38,118 'address':148 'ai/ml':59 'analysi':62 'analyt':58 'api':6,21,37,55,100,117,165,214 'application/json':157 'base':9,24,96,136,151 'behind':232 'beyond':203 'bodi':206 'broad':48 'call':4,19,145 'capabl':231 'catalog':49 'categori':215 'challeng':126 'classif':64 'commit':108 'confirm':127 'connect':173 'content':179 'convers':81 'data':57 'descript':190 'doc':163 'document':158 'embed':65 'endpoint':32,84,111,195,234 'estim':75 'exact':230 'exampl':187 'exchang':70 'expect':202 'extrem':160 'feed':69 'financ':66 'function':225 'gas':74 'generat':82 'geocod':79 'host':46 'http':121 'http-post' 'i.e':142 'id':222 'individu':220 'infer':60 'infrastructur':77 'input':200 'json-response' 'key':101 'land':210 'limit':104 'list':114,212 'live':130 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'mani':213 'map':219 'micropayment API' 'mime':154 'minimum':107 'network':97 'openapi':183 'page':168,211 'pay':2,17,52 'pay-per-cal':1,16 'pay-per-request':51 'payabl':91 'payment':42 'per':3,18,53,89,144 'post':122,205 'premium':5,20,36,116 'price':68,86,164 'prompt':175 'protocol':43 'provid':35 'quot':73 'rate':71,103 'readm':167 'render':170 'request':54,90,123,131 'request/response':186 'respons':153 'result':228 'return':197 'schema':184 'sentiment':61 'settl':146 'site':45,208 'span':56 'spars':161 'specif':110,196,224 'summar':63 'token':72 'type':155 'unclear':236 'unit':137 'usdc':15,30,93,139,141 'usdc-base' 'util':78 'valid':80 'via':10,25,39 'wallet':174 'web3':67 'wire':221 'x402':11,26,41,125 'x402 premium API' 'x402-payment'","prices":[{"id":"fa642473-a686-40f2-b5fb-909c234d1cc8","listingId":"c5261f15-9fa0-43e3-942e-cef726e71fc4","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/194","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:59.843Z"}],"sources":[{"listingId":"c5261f15-9fa0-43e3-942e-cef726e71fc4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/194","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:59.843Z","lastSeenAt":"2026-04-22T13:32:00.227Z"}],"details":{"listingId":"c5261f15-9fa0-43e3-942e-cef726e71fc4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/194 \\\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 API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge confirms maxAmountRequired of 20000 base units of USDC (0.02 USD) on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/194"},{"claim":"Site lists APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to premium API functionality with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API access on Base","Integrating pay-as-you-go endpoints without subscription overhead"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents that can settle x402 payments in USDC on Base","Projects needing keyless API access with no rate limits"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","Applications requiring free or fiat-only payment methods","Use cases that need guaranteed SLAs or support contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.586Z"},"updatedAt":"2026-04-22T13:32:00.227Z"}}