{"id":"e12f22ba-229c-43ae-8382-a69513c8816c","shortId":"F9XegE","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 a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/wire/75` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe broader platform advertises multiple API 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 listed at the same $0.02 per request price point.\n\nHowever, the specific functionality of the `/api/v1/wire/75` endpoint is not documented beyond the label \"Premium API Access.\" The docs, pricing, and API pages on the site all render only a \"Connect wallet\" prompt with no further technical documentation, schemas, or example payloads. Without additional documentation it is unclear what data or service this particular endpoint returns, what request body it expects, or how its response is structured.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-endpoint"],"categories":["api-platform","infrastructure"],"synonyms":["x402 API","pay per call API","USDC API","Base network API","micropayment API","lowpaymentfee","wire endpoint"],"warnings":["No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no content.","The specific functionality of /api/v1/wire/75 is unknown; 'Premium API Access' is not descriptive.","No request body schema or response schema is provided anywhere.","No OpenAPI spec, no examples, no error documentation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/wire/75","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/75","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no documentation, no request/response schema, and no description of what the endpoint actually does beyond the generic label 'Premium API Access'. The docs pages are empty. This is effectively a stub 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'/request':12,31 '0.02':11,30,75,153 '000':79 '20':78 '6':85 'Base network API' 'USDC API' 'accept':54 'access':70,174 'account':90 'addit':201 'advertis':109 'ai':15,34,120 'analysi':124 'analyt':114 'api':5,24,46,69,88,111,173,179 'attach':98 'base':8,27,59,80 'beyond':169 'bodi':216 'broader':107 'call':4,23,77 'caller':96 'categori':112 'classif':127 'connect':188 'convers':144 'cost':72 'data':14,33,113,117,207 'decim':86 'doc':176 'document':168,195,202 'embed':128 'endpoint':19,38,63,147,165,212 'estim':138 'exampl':198 'exchang':133 'expect':218 'export':118 'feed':132 'financ':16,35,129 'function':161 'gas':137 'generat':145 'geocod':142 'header':102 'howev':158 'infrastructur':140 'insight':119 'key':89 'label':171 'learn':122 'limit':93 'list':66,149 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':121 'metric':115 'micropayment API' 'multipl':110 'network':60 'no-api-key' 'page':180 'particular':211 'pay':2,21,43 'pay per call API' 'pay-per-cal':1,20 'pay-per-request':42 'payload':199 'payment':56,101 'per':3,22,44,76,154 'platform':6,25,47,108 'point':157 'post-endpoint' 'premium':68,172 'price':131,156,177 'prompt':190 'protocol':52 'quot':136 'rate':92,134 'render':185 'report':116 'request':45,105,155,215 'requir':95 'respons':222 'return':213 'schema':196 'sentiment':123 'servic':209 'simpli':97 'site':183 'specif':62,160 'structur':224 'summar':126 'technic':194 'text':125 'token':135 'unclear':205 'unit':81 'usdc':55,83 'usdc-base' 'use':49 'util':18,37,141 'valid':143 'via':9,28 'wallet':189 'web3':130 'wire endpoint' 'without':200 'x402':10,29,51,100 'x402 API' 'x402-payment'","prices":[{"id":"1f242ae5-ac4c-4ab3-8a9c-4afc696bd867","listingId":"e12f22ba-229c-43ae-8382-a69513c8816c","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/75","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:11.959Z"}],"sources":[{"listingId":"e12f22ba-229c-43ae-8382-a69513c8816c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/wire/75","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:11.959Z","lastSeenAt":"2026-04-22T16:32:23.392Z"}],"details":{"listingId":"e12f22ba-229c-43ae-8382-a69513c8816c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/wire/75 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","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 requesting up to 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/wire/75"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/wire/75"},{"claim":"Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API endpoint with per-call USDC micropayments","Agent-driven workflows that need keyless, on-demand API access settled on Base","Testing x402 payment flows against a live endpoint"],"bestFor":["Developers or agents wanting frictionless pay-per-use API access without signup","x402-compatible wallets and agent frameworks on Base","Low-volume or bursty workloads where subscription pricing is wasteful"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk or subscription pricing","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:30.007Z"},"updatedAt":"2026-04-22T16:32:23.392Z"}}