{"id":"17b6dd79-07e8-4113-9490-50a3b719c15f","shortId":"5wrEX2","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/84` is part of the lowpaymentfee.com platform, which offers a suite 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/84` path is not documented — the listing title is simply \"Premium API Access\" — so the exact data or service it returns is unclear. It may relate to ACH (Automated Clearing House) banking data or routing information given the URL path, but this is speculative.\n\nPricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). There are no API keys, no rate limits, and no minimum commitments advertised. Payment is made inline via the x402 `X-PAYMENT` header on each call. The endpoint accepts POST requests and returns `application/json`. The x402 challenge was successfully captured with version 1, confirming the endpoint is live.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint actually does beyond the generic \"Premium API Access\" label. Prospective users should be aware that the exact functionality of this endpoint is undocumented.","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/84 is completely undocumented — the description is only 'Premium API Access'","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no technical content","No OpenAPI schema, no request body schema, and no response examples are available","The 'ach/84' path suggests ACH banking data but this is speculative — do not rely on it without verification"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/84","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/84","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 captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this specific endpoint does, no request/response schema, no examples, and the docs pages are empty. The exact purpose of /api/v1/ach/84 is 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'/request':12,30 '0.02':11,29,132,144 '000':136 '1':188 '20':135 '6':142 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':174 'access':98,240 'ach':5,23,113 'actual':233 'addit':214 'advertis':157 'ai/ml':60 'analyt':59 'api':16,34,56,97,148,201,239 'application/json':179 'autom':114 'awar':246 'bank':117 'base':8,26,79,137 'base-network' 'beyond':235 'call':4,22,171 'captur':185 'challeng':182 'clear':115 'commit':156 'confirm':189 'connect':209 'crypto':63 'data':58,102,118 'decim':143 'descript':227 'detail':216 'doc':199 'document':90,194 'endpoint':6,24,38,68,173,191,232,253 'exact':101,249 'exampl':224 'extrem':196 'financ':62 'function':83,250 'generic':237 'given':122 'header':168 'hous':116 'infer':61 'inform':121 'inlin':161 'json-response' 'key':17,35,149 'label':241 'limit':152 'list':92 'live':193 'low fee API' 'lowpaymentfee.com':45 'made':160 'may':110 'minimum':155 'network':80 'no-api-key' 'offer':48 'openapi':220 'page':204 'part':42 'path':87,125 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':72,158,167 'payment API' 'per':3,21,54,133 'platform':46 'post':175 'post-method' 'premium':96,238 'price':130,200 'prompt':211 'prospect':242 'protocol':73 'rate':151 'readm':203 'relat':111 'render':206 'request':55,134,176 'request/response':223 'requir':18,36 'return':106,178 'rout':120 'schema':221 'servic':66,104 'settl':74 'simpli':95 'span':57 'spars':197 'specif':82,231 'specul':129 'success':184 'suit':50 'technic':215 'titl':93 'unclear':108 'undocu':255 'unit':138 'url':124 'usdc':14,32,76,140 'usdc-settlement' 'use':69 'user':243 'util':65 'version':187 'via':9,27,162 'wallet':210 'x':166 'x-payment':165 'x402':10,28,71,164,181 'x402 endpoint' 'x402-payment'","prices":[{"id":"1820cb57-f695-4762-8f32-9fb6aa920b45","listingId":"17b6dd79-07e8-4113-9490-50a3b719c15f","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/84","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:25.247Z"}],"sources":[{"listingId":"17b6dd79-07e8-4113-9490-50a3b719c15f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/84","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:25.247Z","lastSeenAt":"2026-04-27T09:33:29.970Z"}],"details":{"listingId":"17b6dd79-07e8-4113-9490-50a3b719c15f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/84 \\\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":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/84"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing ACH-related data or services on a per-request basis without subscription","Integrating pay-per-call endpoints into agent workflows using x402 protocol","Testing x402 payment flows with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing low-cost per-call API access without API key management","Projects requiring USDC-settled micropayments on Base"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume use cases where per-request pricing may add up without bulk discounts","Anyone needing a well-documented, production-grade ACH integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.335Z"},"updatedAt":"2026-04-27T09:33:29.970Z"}}