{"id":"cebcdc0c-d198-4f1e-839b-a3786bc0dc22","shortId":"vvr7ec","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/119` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-call 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 specific function of the `/api/v1/ach/119` path is not documented — the listing title is simply \"Premium API Access\" — so its exact capability is unclear. It may relate to ACH (Automated Clearing House) payment processing or data, but this is speculative based solely on the URL path.\n\nPricing is $0.02 per request (the x402 challenge advertises a maxAmountRequired of 20000 base units of USDC, which has 6 decimals, equaling $0.02). Payment is made inline via the X-PAYMENT header using the x402 exact scheme — no API keys, accounts, or rate limits are advertised. The endpoint accepts POST requests and returns application/json responses.\n\nThe platform's documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all resolve to a minimal \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no usage examples available. Without knowing what this endpoint actually does or what parameters it accepts, integration requires experimentation or direct contact with the provider.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment API","low fee API","x402 endpoint","USDC micropayment API","Base network API","pay-per-call API"],"warnings":["The specific function of /api/v1/ach/119 is completely undocumented — the 'ACH' in the path is the only hint at its purpose","All documentation pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt with no technical content","No request or response schema is available; integration requires blind experimentation","The provider site lists many endpoints but none match this specific /api/v1/ach/119 path, raising questions about whether it is a standard offering"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/119","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/119","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this endpoint actually does, what inputs it accepts, or what it returns. No OpenAPI spec, no examples, no request/response schemas. The listing title 'Premium API Access' is generic and uninformative. This is effectively a 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'/api/v1/ach/119':40,86 '/call':12,30 '/docs':188 '/pricing':189 '/readme':191 '0.02':11,29,129,149 '20000':139 '6':146 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':176,229 'access':98 'account':168 'ach':5,23,109 'actual':223 'advertis':135,173 'ai/ml':60 'analyt':59 'api':16,34,56,97,166 'application/json':181 'autom':110 'avail':217 'base':8,26,79,121,140 'base-network' 'call':55 'capabl':102 'challeng':134 'clear':111 'collect':50 'connect':197 'contact':235 'crypto':63 'data':58,116 'decim':147 'detail':204 'direct':234 'document':90,186 'endpoint':6,24,38,68,175,222 'equal':148 'exact':101,163 'exampl':216 'experiment':232 'financ':62 'function':83 'header':159 'hous':112 'infer':61 'inlin':153 'integr':230 'json-response' 'key':17,35,167 'know':219 'limit':171 'list':92 'low fee API' 'lowpaymentfee.com':45 'made':152 'maxamountrequir':137 'may':106 'minim':196 'network':80 'no-api-key' 'offer':48 'openapi':208 'page':187 'paramet':227 'part':42 'path':87,126 'pay':2,20,53 'pay-per-cal':52 'pay-per-call API' 'pay-per-request':1,19 'payment':72,113,150,158 'payment API' 'per':3,21,54,130 'platform':46,184 'post':177 'post-method' 'premium':96 'price':127 'process':114 'prompt':199 'protocol':73 'provid':238 'rate':170 'relat':107 'request':4,22,131,178 'request/response':211 'requir':18,36,231 'resolv':193 'respons':182 'return':180 'schema':212 'scheme':164 'servic':66 'settl':74 'simpli':95 'sole':122 'span':57 'spec':209 'specif':82 'specul':120 'technic':203 'titl':93 'unclear':104 'unit':141 'url':125 'usag':215 'usdc':14,32,76,143 'usdc-settlement' 'use':69,160 'util':65 'via':9,27,154 'wallet':198 'without':218 'x':157 'x-payment':156 'x402':10,28,71,133,162 'x402 endpoint' 'x402-payment'","prices":[{"id":"e8d1a1f5-5df6-431d-bfc5-e5b5676ee353","listingId":"cebcdc0c-d198-4f1e-839b-a3786bc0dc22","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/119","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:52.440Z"}],"sources":[{"listingId":"cebcdc0c-d198-4f1e-839b-a3786bc0dc22","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/119","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:52.440Z","lastSeenAt":"2026-04-27T15:05:15.470Z"}],"details":{"listingId":"cebcdc0c-d198-4f1e-839b-a3786bc0dc22","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/119 \\\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 x402 challenge returns maxAmountRequired of 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/119"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages resolve to minimal 'Connect wallet' content with no technical details","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing a pay-per-call API endpoint without needing API keys or subscriptions","Programmatic ACH-related data or payment operations (speculative based on URL path)","Agent-driven API consumption with inline USDC micropayments on Base"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto micropayments over traditional billing"],"notFor":["Anyone needing detailed API documentation or guaranteed SLAs before integrating","Use cases requiring free or fiat-billed API access","Production systems that need well-documented request/response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.988Z"},"updatedAt":"2026-04-27T15:05:15.470Z"}}