{"id":"dde6d28e-6758-4f7c-b0d3-5b7add7ef763","shortId":"V9BgnU","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/98` 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/98` path is not documented — the listing title is simply \"Premium API Access\" and the path suggests it may relate to ACH (Automated Clearing House) banking or payment data, but this is speculative.\n\nThe endpoint is live and returns a valid x402 challenge. It accepts POST requests and charges a maximum of 20,000 base units of USDC (0.02 USD) per call. Payment is made via the x402 `exact` scheme to address `0x1A2B...85F3` using the USDC contract on Base (`0x8335...2913`). No API keys, rate limits, or subscriptions are required — each request is independently paid.\n\nDocumentation is extremely sparse. The provider's landing page lists many endpoints but provides no request/response schemas, parameter descriptions, or usage examples. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. Without knowing what inputs this endpoint expects or what it returns, integration requires experimentation or direct contact with the provider.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","x402 API","USDC micropayment","lowpaymentfee","pay-per-call API","Base network API"],"warnings":["The specific purpose of /api/v1/ach/98 is undocumented — the path hints at ACH banking but this is unverified.","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content.","No request or response schema is available; integration requires blind experimentation.","The provider lists many endpoints on the landing page but none appear to have detailed documentation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/98","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/98","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 /api/v1/ach/98 actually does, what inputs it expects, or what it returns. No OpenAPI spec, no examples, no parameter descriptions. The docs pages are empty. This is effectively a stub 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'/request':12,30 '0.02':11,29,144 '000':139 '0x1a2b':158 '0x8335':166 '20':138 '2913':167 '85f3':159 'ACH API' 'Base network API' 'USDC micropayment' 'accept':130 'access':98 'ach':5,23,107 'addit':220 'address':157 'ai/ml':60 'analyt':59 'api':16,34,56,97,169,206 'autom':108 'bank':111 'base':8,26,79,140,165 'base-network' 'call':4,22,147 'challeng':128 'charg':134 'clear':109 'collect':50 'connect':215 'contact':238 'content':221 'contract':163 'crypto':63 'data':58,114 'descript':200 'direct':237 'doc':205 'document':90,182 'endpoint':6,24,38,68,120,193,227 'exact':154 'exampl':203 'expect':228 'experiment':235 'extrem':184 'financ':62 'function':83 'hous':110 'independ':180 'infer':61 'input':225 'integr':233 'key':17,35,170 'know':223 'land':189 'limit':172 'list':92,191 'live':122 'lowpaymentfee' 'lowpaymentfee.com':45 'made':150 'mani':192 'maximum':136 'may':104 'network':80 'no-api-key' 'offer':48 'page':190,210 'paid':181 'paramet':199 'part':42 'path':87,101 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':72,113,148 'payment processing API' 'per':3,21,54,146 'platform':46 'post':131 'post-endpoint' 'premium':96 'price':207 'prompt':217 'protocol':73 'provid':187,195,241 'rate':171 'readm':209 'relat':105 'render':212 'request':55,132,178 'request/response':197 'requir':18,36,176,234 'return':124,232 'schema':198 'scheme':155 'servic':66 'settl':74 'simpli':95 'span':57 'spars':185 'specif':82 'specul':118 'subscript':174 'suggest':102 'titl':93 'unit':141 'usag':202 'usd':145 'usdc':14,32,76,143,162 'usdc-settlement' 'use':69,160 'util':65 'valid':126 'via':9,27,151 'wallet':216 'without':222 'x402':10,28,71,127,153 'x402 API' 'x402-payment'","prices":[{"id":"0939d8b5-1b92-4eba-b235-98355978a1a0","listingId":"dde6d28e-6758-4f7c-b0d3-5b7add7ef763","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/98","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":"dde6d28e-6758-4f7c-b0d3-5b7add7ef763","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/98","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:25.247Z","lastSeenAt":"2026-04-27T09:33:30.014Z"}],"details":{"listingId":"dde6d28e-6758-4f7c-b0d3-5b7add7ef763","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/98 \\\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":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/98"},{"claim":"All endpoints priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/98"},{"claim":"Docs, API, pricing, and README pages show only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to ACH-related data or operations via micropayment","Agent-driven API consumption without pre-registration or API keys","Integrating pay-per-use financial endpoints into automated workflows"],"bestFor":["Developers wanting zero-setup API access with crypto micropayments","AI agents that can settle x402 payments autonomously on Base","Prototyping integrations without subscription commitments"],"notFor":["Users who need detailed API documentation before integrating","High-volume use cases where per-request pricing may add up","Anyone requiring fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.334Z"},"updatedAt":"2026-04-27T09:33:30.014Z"}}