{"id":"8b05b26c-0bb0-46c9-9125-fc2482da70ce","shortId":"uu3LkV","kind":"x402","title":"Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.","tagline":"Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.","description":"This endpoint at `/api/v1/ach/71` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The pricing is uniform at $0.02 per request (20,000 base units of USDC with 6 decimals), with no API keys, rate limits, or subscription commitments required.\n\nThe specific function of the `/api/v1/ach/71` endpoint is not documented beyond its listing title \"Premium API Access.\" The path suggests it may relate to ACH (Automated Clearing House) payment processing or financial data, but no schema, request/response examples, or detailed documentation are available. The endpoint is live and returns a valid x402 402 challenge when probed via POST, confirming it accepts USDC payments to wallet `0x1A2B...85F3` on Base.\n\nThe broader lowpaymentfee.com platform advertises categories including Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). However, the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content, so detailed documentation for any endpoint — including this one — is unavailable.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ach-endpoint"],"categories":["finance","payments"],"synonyms":["ACH API","payment processing API","x402 API","USDC pay-per-call","lowpaymentfee","Base network API","automated clearing house"],"warnings":["The exact function of /api/v1/ach/71 is undocumented — the 'Premium API Access' title is generic and uninformative.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.","No request or response schema is available; callers cannot know what to send or what to expect back.","The endpoint path suggests ACH/financial functionality but this is purely inferred from the URL path segment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/71","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/ach/71","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 challenge, but there is zero documentation on what it actually does, no request/response schema, and the docs pages are empty. The specific purpose of '/api/v1/ach/71' is unknown beyond the generic title 'Premium API Access.' This is effectively a stub 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'/call':12,30 '0.02':11,29,86 '000':90 '0x1a2b':173 '20':89 '402':160 '6':96 '85f3':174 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':168 'access':124 'ach':5,23,132 'ach-endpoint' 'advertis':181 'ai':191 'ai/ml':60 'analysi':195 'analyt':59,185 'api':16,34,56,100,123,220 'autom':133 'automated clearing house' 'avail':150 'base':8,26,79,91,176 'base-network' 'beyond':118 'broader':178 'categori':182 'challeng':161 'classif':197 'clear':134 'collect':50 'commit':106 'confirm':166 'connect':226 'content':232 'convers':213 'crypto':63 'data':58,140,184,188 'decim':97 'detail':147,234 'doc':217 'document':117,148,235 'embed':198 'endpoint':6,24,38,68,114,152,238 'estim':208 'exampl':145 'exchang':203 'export':189 'feed':202 'financ':62,199 'financi':139 'function':110 'gas':207 'generat':214 'geocod':211 'hous':135 'howev':215 'includ':183,239 'infer':61 'infrastructur':210 'insight':190 'key':17,35,101 'learn':193 'limit':103 'list':120 'live':154 'lowpaymentfee' 'lowpaymentfee.com':45,179 'machin':192 'may':129 'metric':186 'network':80 'no-api-key' 'offer':48 'one':241 'page':221 'part':42 'path':126 'pay':2,20,53 'pay-per-request':1,19,52 'payment':72,136,170 'payment processing API' 'per':3,21,54,87 'platform':46,180 'post':165 'premium':122 'price':82,201,218 'probe':163 'process':137 'prompt':228 'protocol':73 'quot':206 'rate':102,204 'relat':130 'render':223 'report':187 'request':4,22,55,88 'request/response':144 'requir':18,36,107 'return':156 'schema':143 'sentiment':194 'servic':66 'settl':74 'span':57 'specif':109 'subscript':105 'suggest':127 'summar':196 'titl':121 'token':205 'unavail':243 'uniform':84 'unit':92 'usdc':14,32,76,94,169 'usdc-settlement' 'use':69 'util':65 'valid':158,212 'via':9,27,164 'wallet':172,227 'web3':200 'x402':10,28,71,159 'x402 API' 'x402-payment'","prices":[{"id":"a31db35e-bd32-40c9-8faa-2cc94f7eec09","listingId":"8b05b26c-0bb0-46c9-9125-fc2482da70ce","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/ach/71","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:19.843Z"}],"sources":[{"listingId":"8b05b26c-0bb0-46c9-9125-fc2482da70ce","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/71","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:19.843Z","lastSeenAt":"2026-04-24T22:32:11.935Z"}],"details":{"listingId":"8b05b26c-0bb0-46c9-9125-fc2482da70ce","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/71 \\\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":"Uniform pricing of $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired 20000 in USDC (asset 0x8335…) on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/71"},{"claim":"Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages show only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to ACH-related financial data or processing via a single micropayment","Agent-driven payment workflows that need no pre-registration or API key management","Integrating low-cost per-call financial endpoints into automated pipelines"],"bestFor":["Developers or agents wanting frictionless pay-per-use API access without subscriptions","Crypto-native applications already operating on the Base network with USDC","Prototyping or low-volume use cases where $0.02/request is cost-effective"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume production workloads where per-request pricing may add up quickly","Anyone requiring non-crypto payment methods (no fiat/card option available)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.594Z"},"updatedAt":"2026-04-24T22:32:11.935Z"}}