{"id":"86839381-8079-4d92-b66a-47984fbfb4a5","shortId":"eF2mgN","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/38` 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/38` endpoint is not documented beyond its listing title \"Premium API Access,\" so its exact purpose is unclear — the \"ach\" path segment suggests it may relate to ACH (Automated Clearing House) banking or payment data, 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 endpoints. There are no API keys, no rate limits, and no subscription commitments — callers simply attach an x402 payment header with each request. The endpoint accepts POST requests and returns `application/json` responses.\n\nDocumentation is extremely sparse. The landing page lists available endpoints with one-line descriptions, but the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical content. There is no OpenAPI schema, no request/response examples, and no detailed description of what data this endpoint accepts or returns.","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","premium API access","lowpaymentfee","x402 endpoint","USDC micropayment API","Base network API"],"warnings":["The specific function of /api/v1/ach/38 is undocumented; 'Premium API Access' is a generic label applied to this endpoint","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no technical content","No request body schema or response schema is available","No OpenAPI or machine-readable specification found","The 'ach' path segment may imply regulated financial data (ACH banking), but this is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/38","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/38","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 402 x402 challenge), but documentation is essentially nonexistent — no OpenAPI spec, no request/response examples, and no explanation of what the endpoint actually does. The docs/pricing/README pages are all blank beyond a wallet connect prompt. The endpoint's purpose can only be guessed from its URL 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'/request':12,30 '0.02':11,29,127,139 '000':131 '20':130 '6':137 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':174,233 'access':97 'ach':5,23,105,113 'across':147 'addit':213 'ai/ml':60 'analyt':59 'api':16,34,56,96,153,199 'application/json':179 'attach':164 'autom':114 'avail':189 'bank':117 'base':8,26,79,132 'base-network' 'beyond':91 'call':4,22 'caller':162 'clear':115 'collect':50 'commit':161 'connect':208 'consist':140 'content':215 'crypto':63 'data':58,120,230 'decim':138 'descript':195,227 'detail':226 'doc':198 'document':90,181 'endpoint':6,24,38,68,87,149,173,190,232 'exact':100 'exampl':223 'extrem':183 'financ':62 'function':83 'header':168 'hous':116 'infer':61 'json-response' 'key':17,35,154 'land':186 'limit':157 'line':194 'list':93,188 'lowpaymentfee' 'lowpaymentfee.com':45 'may':110 'network':80 'no-api-key' 'offer':48 'one':193 'one-lin':192 'openapi':219 'page':187,203 'part':42 'path':106 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-request':52 'payment':72,119,167 'payment API' 'per':3,21,54,128 'platform':46,143 'post':175 'post-method' 'premium':95 'premium API access' 'price':125,146,200 'prompt':210 'protocol':73 'purpos':101 'rate':156 'readm':202 'relat':111 'render':205 'request':55,129,171,176 'request/response':222 'requir':18,36 'respons':180 'return':178,235 'schema':220 'segment':107 'servic':66 'settl':74 'simpli':163 'span':57 'spars':184 'specif':82 'specul':124 'subscript':160 'suggest':108 'technic':214 'titl':94 'unclear':103 'uniform':145 'unit':133 'usdc':14,32,76,135 'usdc-settlement' 'use':69 'util':65 'via':9,27 'wallet':209 'x402':10,28,71,166 'x402 endpoint' 'x402-payment'","prices":[{"id":"e51fe2dd-3379-4a98-8dc2-770aea93ceaf","listingId":"86839381-8079-4d92-b66a-47984fbfb4a5","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/38","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:32.873Z"}],"sources":[{"listingId":"86839381-8079-4d92-b66a-47984fbfb4a5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/38","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:32.873Z","lastSeenAt":"2026-04-27T22:32:47.132Z"}],"details":{"listingId":"86839381-8079-4d92-b66a-47984fbfb4a5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/38 \\\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":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/38"},{"claim":"The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing ACH or payment-related data on a per-call basis without subscription","Integrating pay-per-use financial endpoints into agent workflows","Testing x402 payment protocol integrations with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing low-cost, no-auth API access on Base","Use cases requiring pay-as-you-go pricing without commitments"],"notFor":["Users needing well-documented APIs with clear request/response schemas","High-volume use cases where per-request pricing may add up","Anyone requiring detailed ACH banking integration with guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:35.812Z"},"updatedAt":"2026-04-27T22:32:47.132Z"}}