{"id":"89ec39e1-7e14-4945-9088-9043fa5da897","shortId":"uG2Pdy","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-call 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 request 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/195` is listed as \"Premium API Access\" and accepts HTTP POST requests. Payment is settled on-chain via USDC (contract 0x8335…2913) on Base, using the x402 exact-payment scheme. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the endpoint allows up to 300 seconds for payment timeout.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/wire/195` endpoint specifically returns. The site's landing page lists many endpoints but does not clarify what \"wire/195\" does beyond the generic label \"Premium API Access.\" Without documentation or example payloads, it is unclear what data or functionality this particular endpoint provides.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","http-post","no-api-key","no-rate-limit"],"categories":["api-gateway","crypto"],"synonyms":["x402 api","pay per request api","usdc api access","base network api","micropayment api","lowpaymentfee","crypto paid api"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or JSON schema describing request parameters or response format","The specific purpose of /api/v1/wire/195 ('Premium API Access') is not explained anywhere","Cannot verify what data or service this endpoint actually provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/195","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/195","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns 402 with a valid x402 challenge), but there is virtually no documentation: no OpenAPI schema, no request/response examples, and no explanation of what /api/v1/wire/195 specifically does. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. The listing is effectively a 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'/request':13,28 '0.02':12,27,86,157 '000':148 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':163 '0x8335':129 '20':147 '2913':130 '300':170 '6':153 'accept':116 'access':7,22,38,114,236 'addit':195 'address':161 'ai/ml':59 'allow':167 'amount':142 'analysi':62 'analyt':58 'api':6,21,37,55,95,113,182,235 'base':9,24,91,132,149 'base network api' 'beyond':230 'broad':48 'call':4,19,54,145 'catalog':49 'chain':125 'clarifi':226 'classif':64 'commit':103 'connect':190 'content':196 'contract':128 'convers':81 'cost':85 'crypto paid api' 'data':57,246 'decim':154 'descript':207 'doc':180 'document':175,238 'embed':65 'endpoint':32,107,166,212,222,251 'equal':156 'estim':75 'exact':137 'exact-pay':136 'exampl':204,240 'exchang':70 'extrem':177 'feed':69 'financ':66 'function':248 'gas':74 'generat':82 'generic':232 'geocod':79 'host':46 'http':117 'http-post' 'infer':60 'infrastructur':77 'key':96 'label':233 'land':218 'limit':99 'list':110,220 'lowpaymentfee' 'lowpaymentfee.com':34 'mani':221 'maximum':141 'micropayment api' 'minimum':102 'network':92 'no-api-key' 'no-rate-limit' 'on-chain':123 'openapi':200 'page':185,219 'particular':250 'pay':2,17,52 'pay per request api' 'pay-per-cal':1,16,51 'pay-per-call' 'payload':241 'payment':42,120,138,159,173 'per':3,18,53,144 'post':118 'premium':5,20,36,112,234 'price':68,181 'prompt':192 'protocol':43 'provid':35,252 'quot':73 'rate':71,98 'readm':184 'recipi':160 'render':187 'request':84,119 'request/response':203 'requir':104,143 'return':214 'schema':201 'scheme':139 'second':171 'sentiment':61 'settl':122 'site':45,216 'span':56 'spars':178 'specif':106,213 'summar':63 'timeout':174 'token':72 'unclear':244 'unit':150 'usdc':15,30,88,127,152 'usdc api access' 'usdc-base' 'use':133 'util':78 'valid':80 'via':10,25,39,126 'wallet':191 'web3':67 'wire/195':228 'without':237 'x402':11,26,41,135 'x402 api' 'x402-payment'","prices":[{"id":"d8485061-548b-4430-9f06-0cf1fcf7009d","listingId":"89ec39e1-7e14-4945-9088-9043fa5da897","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/195","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:04.700Z"}],"sources":[{"listingId":"89ec39e1-7e14-4945-9088-9043fa5da897","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/195","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:04.700Z","lastSeenAt":"2026-04-22T10:02:36.252Z"}],"details":{"listingId":"89ec39e1-7e14-4945-9088-9043fa5da897","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/195 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/195"},{"claim":"All APIs on the site cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/195"}],"useCases":["Accessing premium API endpoints without traditional API key registration","Making one-off paid API calls settled in USDC on Base","Agent-driven programmatic access to paid services via x402 protocol"],"bestFor":["Developers who want keyless, pay-as-you-go API access","AI agents that can settle x402 payments on Base","Users who prefer on-chain micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume use cases where $0.02/request adds up significantly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.319Z"},"updatedAt":"2026-04-22T10:02:36.252Z"}}