{"id":"ddc3ddba-c518-40db-8ed9-015e6efbf2b3","shortId":"EPXbes","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). Each call costs $0.02 in USDC on the Base network, with no API keys, no rate limits, and no minimum commitments required.\n\nThe specific endpoint `/api/v1/wire/130` is listed as \"Premium API Access\" and accepts HTTP POST requests. Payment is settled on-chain via the x402 exact-payment scheme: the caller attaches a signed USDC payment (asset 0x8335…2913 on Base) to the X-PAYMENT header. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The endpoint returns application/json responses.\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 spec, no request/response schema documentation, and no examples available. The purpose of the `/api/v1/wire/130` route specifically (as opposed to the other named endpoints like sentiment or geocoding) is unclear from the available material. Prospective users should be aware that without documentation, the actual functionality behind this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","http-post","json-response"],"categories":["api-gateway","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content.","No OpenAPI or schema definition found; request and response formats are unknown.","The specific functionality of /api/v1/wire/130 ('Premium API Access') is not described anywhere — it is unclear what this endpoint actually does.","No request or response examples available."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/130","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/130","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific purpose of /api/v1/wire/130 is not explained anywhere in the crawled material. This is effectively a stub 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'/api/v1/wire/130':108,213 '/docs':179 '/pricing':180 '/readme':183 '/request':13,28 '0.02':12,27,86,166 '000':157 '0x8335':141 '20':156 '2913':142 '6':162 'Base network API' 'USDC micropayment API' 'accept':116 'access':7,22,38,114 'actual':242 'ai/ml':59 'amount':153 'analysi':62 'analyt':58 'api':6,21,37,55,95,113 'application/json':172 'asset':140 'attach':135 'avail':208,231 'awar':237 'base':9,24,91,144,158 'behind':244 'broad':48 'call':4,19,84 'caller':134 'catalog':49 'chain':125 'classif':64 'commit':103 'connect':189 'content':195 'convers':81 'cost':85 'crypto-paid API' 'data':57 'decim':163 'document':174,204,240 'embed':65 'endpoint':32,107,170,222,246 'equal':165 'estim':75 'exact':130 'exact-pay':129 'exampl':207 'exchang':70 'extrem':176 'feed':69 'financ':66 'function':243 'gas':74 'generat':82 'geocod':79,226 'header':150 'host':46 'http':117 'http-post' 'infer':60 'infrastructur':77 'json-response' 'key':96 'like':223 'limit':99 'list':110 'lowpaymentfee' 'lowpaymentfee.com':34 'materi':232 'max':152 'minimum':102 'name':221 'network':92 'on-chain':123 'openapi':199 'oppos':217 'page':184 'pay':2,17,52 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':51 'payment':42,120,131,139,149 'per':3,18,53,167 'post':118 'premium':5,20,36,112 'premium API access' 'price':68 'prompt':191 'prospect':233 'protocol':43 'provid':35 'purpos':210 'quot':73 'rate':71,98 'render':186 'request':54,119,168 'request/response':202 'requir':104,154 'respons':173 'return':171 'rout':214 'schema':203 'scheme':132 'sentiment':61,224 'settl':122 'sign':137 'site':45 'span':56 'spars':177 'spec':200 'specif':106,215 'summar':63 'token':72 'unclear':228 'unit':159 'unknown':248 'usdc':15,30,88,138,161 'usdc-base' 'user':234 'util':78 'valid':80 'via':10,25,39,126 'wallet':190 'web3':67 'without':239 'x':148 'x-payment':147 'x402':11,26,41,128 'x402 API' 'x402-payment'","prices":[{"id":"9096c6fe-6466-4e84-9c82-5e52030e11f3","listingId":"ddc3ddba-c518-40db-8ed9-015e6efbf2b3","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/130","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:28:36.784Z"}],"sources":[{"listingId":"ddc3ddba-c518-40db-8ed9-015e6efbf2b3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/130","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:28:36.784Z","lastSeenAt":"2026-04-22T10:02:34.815Z"}],"details":{"listingId":"ddc3ddba-c518-40db-8ed9-015e6efbf2b3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/130 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The site lists APIs across data & analytics, AI/ML, finance & Web3, and infrastructure categories, all at $0.02/request.","source_url":"https://lowpaymentfee.com"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/wire/130"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing premium API functionality with per-request USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic access without subscription or API key management"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents with x402-compatible payment capabilities","Users who prefer on-chain USDC settlement over traditional billing"],"notFor":["Users who need detailed API documentation or request/response schemas before integrating","High-volume use cases where per-request pricing may add up compared to subscription plans","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:31.702Z"},"updatedAt":"2026-04-22T10:02:34.815Z"}}