{"id":"5e1c0664-d546-415b-9cb8-277a52e53d58","shortId":"5AgsZ7","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/114` is part of the lowpaymentfee.com platform, which offers a broad catalog 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 specific function of the `/api/v1/ach/114` path is not documented — the listing title is simply \"Premium API Access\" — so its exact purpose is unclear. It may relate to ACH (Automated Clearing House) payment processing or lookup given the URL path segment, but this is speculative.\n\nPricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), consistent with the platform's uniform pricing across all listed endpoints. The platform advertises no API keys, no rate limits, no minimums, and instant access. Payment is handled entirely via the x402 `X-PAYMENT` header with USDC on Base (asset contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The endpoint accepts POST requests and returns `application/json`.\n\nDocumentation is extremely sparse — the docs, API, pricing, 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 data this endpoint actually returns or what parameters it accepts.","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","x402 endpoint","USDC micropayment API","lowpaymentfee","pay-per-call API","Base network API"],"warnings":["The exact function of /api/v1/ach/114 is undocumented — the 'ACH' path segment suggests payment/banking functionality but this is not confirmed","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content","No request or response schema is available — callers have no way to know what parameters to send","If this endpoint relates to ACH banking transactions, it may fall under financial regulation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/114","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/114","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 parameters it accepts, or what it returns. No OpenAPI schema, no examples, and all doc pages are empty. The endpoint path suggests ACH-related functionality but this is 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'/request':12,30 '0.02':11,29,129,141 '000':133 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':184 '20':132 '6':139 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':187,237 'access':99,166 'ach':5,23,110 'across':149 'actual':231 'addit':213 'advertis':155 'ai/ml':61 'analyt':60 'api':16,34,57,98,157,199 'application/json':192 'asset':182 'autom':111 'base':8,26,80,134,181 'base-network' 'broad':50 'call':4,22 'catalog':51 'clear':112 'connect':208 'consist':142 'content':214 'contract':183 'crypto':64 'data':59,228 'decim':140 'descript':225 'doc':198 'document':91,193 'endpoint':6,24,38,69,152,186,230 'entir':170 'exact':102 'exampl':222 'extrem':195 'financ':63 'function':84 'given':118 'handl':169 'header':177 'hous':113 'infer':62 'instant':165 'json-response' 'key':17,35,158 'limit':161 'list':93,151 'lookup':117 'lowpaymentfee' 'lowpaymentfee.com':45 'may':107 'minimum':163 'network':81 'no-api-key' 'offer':48 'openapi':218 'page':203 'paramet':235 'part':42 'path':88,121 'pay':2,20,54 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':53 'payment':73,114,167,176 'payment API' 'per':3,21,55,130 'platform':46,145,154 'post':188 'post-method' 'premium':97 'price':127,148,200 'process':115 'prompt':210 'protocol':74 'purpos':103 'rate':160 'readm':202 'relat':108 'render':205 'request':56,131,189 'request/response':221 'requir':18,36 'return':191,232 'schema':219 'segment':122 'servic':67 'settl':75 'simpli':96 'span':58 'spars':196 'specif':83 'specul':126 'titl':94 'unclear':105 'uniform':147 'unit':135 'url':120 'usdc':14,32,77,137,179 'usdc-settlement' 'use':70 'util':66 'via':9,27,171 'wallet':209 'x':175 'x-payment':174 'x402':10,28,72,173 'x402 endpoint' 'x402-payment'","prices":[{"id":"0d7b0dec-2e80-4b05-9b64-2f817830d1d2","listingId":"5e1c0664-d546-415b-9cb8-277a52e53d58","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/114","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:50.035Z"}],"sources":[{"listingId":"5e1c0664-d546-415b-9cb8-277a52e53d58","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/114","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:50.035Z","lastSeenAt":"2026-04-27T16:34:09.184Z"}],"details":{"listingId":"5e1c0664-d546-415b-9cb8-277a52e53d58","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/114 \\\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":"Platform charges $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (6 decimals) on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/114"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/114"},{"claim":"Docs, API, pricing, and README pages all show only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to an ACH-related service with per-call USDC payment","Agent-driven API consumption without pre-registration or API keys","Integrating pay-as-you-go endpoints into automated workflows"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Prototyping workflows that need instant API access without accounts"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where per-request pricing may add up","Anyone needing clarity on exactly what data this specific endpoint returns"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.063Z"},"updatedAt":"2026-04-27T16:34:09.184Z"}}