{"id":"ccee64c6-36c6-41e0-bf5d-3c1b6141b221","shortId":"nGVtWd","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/104` 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 specific function of the `/api/v1/ach/104` path is not documented — the provider labels it generically as \"Premium API Access\" — so the exact data or service it returns is unclear. It may relate to ACH (Automated Clearing House) banking data given the URL path, but this is speculative.\n\nThe endpoint is live and returns a valid x402 challenge. Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), consistent with the site-wide flat rate. Payment is made via the x402 `exact` scheme to address `0x1A2B...85F3` using USDC (`0x8335...2913`) on Base. No API keys, rate limits, or subscriptions are required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The endpoint accepts HTTP POST 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 further content. There is no OpenAPI spec, no request/response schema, and no examples for this specific endpoint. The site lists many other endpoints across categories (analytics, AI, finance, infrastructure) all at the same $0.02 price point, but none have visible documentation either.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["finance","infrastructure"],"synonyms":["ACH API","ACH data endpoint","automated clearing house API","payment processing API","lowpaymentfee","x402 ACH","Base USDC API"],"warnings":["The exact purpose and functionality of /api/v1/ach/104 is undocumented — 'Premium API Access' is a generic label applied across the site","No request or response schema is available; callers cannot know what to send or expect back","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","The 'ACH' in the path may imply regulated financial services (banking/payments) — verify compliance requirements"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/104","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/104","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 this specific endpoint does, what inputs it expects, or what it returns. No OpenAPI spec, no examples, and the docs pages are empty. The endpoint path suggests ACH-related functionality but this is 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'/request':12,30 '0.02':11,29,140,152,263 '000':144 '0x1a2b':171 '0x8335':175 '20':143 '2913':176 '6':150 '85f3':172 'ACH API' 'ACH data endpoint' 'Base USDC API' 'accept':204 'access':99 'ach':5,23,114 'across':253 'address':170 'ai':256 'ai/ml':60 'analyt':59,255 'api':16,34,56,98,180,216 'application/json':209 'attach':190 'autom':115 'automated clearing house API' 'bank':118 'base':8,26,79,145,178 'base-network' 'call':4,22 'caller':188 'categori':254 'challeng':137 'clear':116 'collect':50 'connect':225 'consist':153 'content':231 'crypto':63 'data':58,103,119 'decim':151 'doc':215 'document':90,210,270 'either':271 'endpoint':6,24,38,68,129,203,246,252 'exact':102,167 'exampl':242 'extrem':212 'financ':62,257 'flat':159 'function':83 'generic':95 'given':120 'header':195 'hous':117 'http':205 'http-post' 'infer':61 'infrastructur':258 'json-response' 'key':17,35,181 'label':93 'limit':183 'list':249 'live':131 'lowpaymentfee' 'lowpaymentfee.com':45 'made':163 'mani':250 'may':111 'network':80 'no-api-key' 'none':267 'offer':48 'openapi':235 'page':220 'part':42 'path':87,123 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-request':52 'payment':72,161,194,200 'payment processing API' 'per':3,21,54,141 'platform':46 'point':265 'post':206 'premium':97 'price':138,217,264 'prompt':227 'proof':201 'protocol':73 'provid':92 'rate':160,182 'readm':219 'relat':112 'render':222 'request':55,142 'request/response':238 'requir':18,36,187 'return':107,133,208 'schema':239 'scheme':168 'servic':66,105 'settl':74 'simpli':189 'site':157,248 'site-wid':156 'span':57 'spars':213 'spec':236 'specif':82,245 'specul':127 'subscript':185 'unclear':109 'unit':146 'url':122 'usdc':14,32,76,148,174 'usdc-settlement' 'use':69,173 'util':65 'valid':135,198 'via':9,27,164 'visibl':269 'wallet':226 'wide':158 'x':193 'x-payment':192 'x402':10,28,71,136,166,199 'x402 ACH' 'x402-payment'","prices":[{"id":"e5315c15-1e63-4f90-9ebf-baf4972c49a1","listingId":"ccee64c6-36c6-41e0-bf5d-3c1b6141b221","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/104","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:49.422Z"}],"sources":[{"listingId":"ccee64c6-36c6-41e0-bf5d-3c1b6141b221","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/104","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:49.422Z","lastSeenAt":"2026-04-27T16:34:09.210Z"}],"details":{"listingId":"ccee64c6-36c6-41e0-bf5d-3c1b6141b221","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/104 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\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/104"},{"claim":"Site-wide 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":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/104"},{"claim":"Documentation pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing ACH-related data or services on a per-call basis without subscriptions","Agent-driven financial data retrieval with crypto micropayments","Integrating pay-per-use banking or payment endpoints into automated workflows"],"bestFor":["Developers wanting zero-commitment, pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer no API key or account registration"],"notFor":["Anyone needing documented request/response schemas before integration","High-volume use cases where per-call pricing may add up versus flat-rate plans","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.035Z"},"updatedAt":"2026-04-27T16:34:09.210Z"}}