{"id":"2e2ec776-a4a7-4a01-8122-5b1d9d9b8606","shortId":"hescsB","kind":"x402","title":"Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC, no API keys required.","tagline":"Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC, no API keys required.","description":"This endpoint at `/api/v1/ach/192` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific function of the `/api/v1/ach/192` path is not documented — the provider labels it generically as \"Premium API Access\" — so its exact capabilities are unclear. It may relate to ACH (Automated Clearing House) payment processing or data, but this is speculative based solely on the URL path.\n\nThe endpoint is live and returns a valid x402 challenge. It accepts POST requests and charges a maximum of 20,000 base units of USDC (0.02 USDC, i.e., $0.02) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The platform advertises no API keys, no rate limits, and instant access. However, documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content, so there is no schema documentation, request/response examples, or detailed description of what this endpoint actually returns.\n\nBecause the endpoint's actual functionality is undocumented beyond its URL path and generic title, agents should treat this as a low-information listing. The x402 payment mechanism is functional, but without knowing the request format or response schema, integration requires experimentation or direct contact with the provider.","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 micropayment","Base network API","lowpaymentfee","automated clearing house"],"warnings":["Endpoint functionality is unknown — 'Premium API Access' and '/ach/192' provide no clear indication of what data or service is returned.","All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no content.","No request or response schema is available; integration requires blind experimentation.","The provider site lists many endpoints across diverse categories (AI, finance, utils) all at $0.02 — it is unclear whether these are fully implemented services or placeholders."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/192","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/192","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC per request on Base), but the endpoint's actual functionality is completely undocumented. No request/response schema, no docs, no examples — only a generic title and a URL path hint. This is effectively a stub 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'/api/v1/ach/192':40,85 '/docs':179 '/pricing':180 '/readme':182 '/request':12,30 '0.02':11,29,152,155 '000':147 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':161 '20':146 'ACH API' 'Base network API' 'USDC micropayment' 'accept':138 'access':98,175 'ach':5,23,109 'ach-endpoint' 'actual':209,215 'address':160 'advertis':166 'agent':226 'ai/ml':60 'analyt':59 'api':16,34,56,97,168 'autom':110 'automated clearing house' 'base':8,26,78,121,148,163 'base-network' 'beyond':219 'call':4,22,157 'capabl':102 'challeng':136 'charg':142 'clear':111 'collect':50 'connect':187 'contact':256 'content':193 'data':58,116 'descript':204 'detail':203 'direct':255 'document':89,177,199 'endpoint':6,24,38,67,128,208,213 'exact':101 'exampl':201 'experiment':253 'finance/web3':62 'format':247 'function':82,216,241 'generic':94,224 'hous':112 'howev':176 'i.e':154 'infer':61 'inform':234 'infrastructur':64 'instant':174 'integr':251 'key':17,35,169 'know':244 'label':92 'limit':172 'list':235 'live':130 'low':233 'low-inform':232 'lowpaymentfee' 'lowpaymentfee.com':45 'maximum':144 'may':106 'mechan':239 'network':79 'no-api-key' 'offer':48 'page':178 'paid':158 'part':42 'path':86,126,222 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-request':52 'payment':71,113,238 'payment processing API' 'per':3,21,54,156 'platform':46,165 'post':139 'premium':96 'process':114 'prompt':189 'protocol':72 'provid':91,259 'rate':171 'relat':107 'request':55,140,246 'request/response':200 'requir':18,36,252 'respons':249 'return':132,184,210 'schema':198,250 'settl':73 'sole':122 'span':57 'specif':81 'specul':120 'substant':192 'titl':225 'treat':228 'unclear':104 'undocu':218 'unit':149 'url':125,221 'usdc':14,32,75,151,153 'usdc-settlement' 'use':68 'util':65 'valid':134 'via':9,27 'wallet':188 'without':243 'x402':10,28,70,135,237 'x402 API' 'x402-payment'","prices":[{"id":"3dc12caa-c9bf-46e2-9c23-2055cf6efcec","listingId":"2e2ec776-a4a7-4a01-8122-5b1d9d9b8606","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/192","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:08.839Z"}],"sources":[{"listingId":"2e2ec776-a4a7-4a01-8122-5b1d9d9b8606","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/192","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:08.839Z","lastSeenAt":"2026-04-24T22:32:11.430Z"}],"details":{"listingId":"2e2ec776-a4a7-4a01-8122-5b1d9d9b8606","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/192 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/192"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/192"},{"claim":"Documentation pages returned only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying per-call for ACH-related data or processing without subscription commitments","Integrating x402-gated financial endpoints into autonomous agent workflows","Accessing pay-as-you-go APIs settled in USDC on Base"],"bestFor":["Agents that can handle x402 payment challenges on Base","Users wanting no-signup, no-API-key access to financial endpoints","Micropayment-based API consumption without rate limits"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","Applications requiring free or fiat-settled API access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.184Z"},"updatedAt":"2026-04-24T22:32:11.430Z"}}