{"id":"5b4dd258-3393-4ac4-ab55-95fd4e4e4111","shortId":"uDBhp4","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/58` 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/58` path is not documented — the listing title is simply \"Premium API Access\" and no schema, parameter descriptions, or example responses are provided. The `ach` path segment suggests it may relate to ACH (Automated Clearing House) banking or payment functionality, but this is speculative.\n\nPricing is $0.02 per request (the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC, which at 6 decimals equals $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`.\n\nDocumentation is extremely thin. The `/docs`, `/api`, `/pricing`, and `/README` pages all render only a \"Connect wallet\" prompt with no additional content. The landing page lists many API paths across categories but provides no request/response schemas, parameter details, or usage examples for any of them. The actual capability behind this specific endpoint remains unclear.","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","pay-per-call API","Base network API"],"warnings":["The specific function of /api/v1/ach/58 is undocumented — the 'ach' path suggests banking/payment functionality but this is unconfirmed","All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no useful content","No request or response schema is available for this endpoint","The endpoint path does not appear in the landing page's listed APIs, raising questions about its status","If this endpoint relates to ACH banking transactions, it may fall under financial regulation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/58","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid x402 402 challenge), but there is virtually no documentation: no request/response schema, no parameter descriptions, no examples, and the docs pages are empty. The purpose of the /api/v1/ach/58 path is unclear. This is effectively a stub 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'/api/v1/ach/58':40,86 '/docs':191 '/pricing':193 '/readme':195 '/request':12,30 '0.02':11,29,132,153 '000':143 '20':142 '6':150 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':180 'access':98 'account':172 'ach':5,23,110,118 'across':215 'actual':232 'addit':206 'advertis':138,177 'ai/ml':60 'analyt':59 'api':16,34,56,97,170,213 'application/json':185 'autom':119 'bank':122 'base':8,26,79,144 'base-network' 'behind':234 'call':4,22 'capabl':233 'categori':216 'challeng':137 'clear':120 'collect':50 'connect':201 'content':207 'crypto':63 'data':58 'decim':151 'descript':103 'detail':223 'document':90,186 'endpoint':6,24,38,68,179,237 'equal':152 'exact':167 'exampl':105,226 'extrem':188 'financ':62 'function':83,125 'header':163 'hous':121 'infer':61 'inlin':157 'json-response' 'key':17,35,171 'land':209 'limit':175 'list':92,211 'low fee API' 'lowpaymentfee.com':45 'made':156 'mani':212 'maxamountrequir':140 'may':115 'network':80 'no-api-key' 'offer':48 'page':196,210 'paramet':102,222 'part':42 'path':87,111,214 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':72,124,154,162 'payment API' 'per':3,21,54,133 'platform':46 'post':181 'post-method' 'premium':96 'price':130 'prompt':203 'protocol':73 'provid':108,218 'rate':174 'relat':116 'remain':238 'render':198 'request':55,134,182 'request/response':220 'requir':18,36 'respons':106 'return':184 'schema':101,221 'scheme':168 'segment':112 'servic':66 'settl':74 'simpli':95 'span':57 'specif':82,236 'specul':129 'suggest':113 'thin':189 'titl':93 'unclear':239 'unit':145 'usag':225 'usdc':14,32,76,147 'usdc-settlement' 'use':69,164 'util':65 'via':9,27,158 'wallet':202 'x':161 'x-payment':160 'x402':10,28,71,136,166 'x402 endpoint' 'x402-payment'","prices":[{"id":"370a5202-e844-4f55-8458-6f0c494b2e03","listingId":"5b4dd258-3393-4ac4-ab55-95fd4e4e4111","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/58","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:14.372Z"}],"sources":[{"listingId":"5b4dd258-3393-4ac4-ab55-95fd4e4e4111","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/58","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:14.372Z","lastSeenAt":"2026-04-27T12:13:02.413Z"}],"details":{"listingId":"5b4dd258-3393-4ac4-ab55-95fd4e4e4111","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/58 \\\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 advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/58"},{"claim":"The landing page lists APIs at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /api, /pricing, /README) render only a 'Connect wallet' prompt","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-use API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume use cases where per-call pricing may add up","Anyone requiring fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.832Z"},"updatedAt":"2026-04-27T12:13:02.413Z"}}