{"id":"1df433a1-8a24-424f-a060-2950d7238edb","shortId":"2qR2zz","kind":"x402","title":"Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC.","description":"This endpoint at `/api/v1/ach/46` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML, finance, infrastructure, and more. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The listed price is $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific function of the `/api/v1/ach/46` endpoint is not documented on the site — it is labeled only as \"Premium API Access\" and does not appear in the main API listing on the homepage. The path suggests it may relate to ACH (Automated Clearing House) payment processing or data, but this is speculative. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires up to 20,000 base units of USDC (i.e., $0.02) per call on the Base network.\n\nThe platform's documentation pages (`/docs`, `/pricing`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content, so there is no schema documentation, request/response examples, or detailed description of what this endpoint returns. Prospective users should test the endpoint directly to determine its actual functionality.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","http-post"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","lowpaymentfee","x402 API","USDC micropayment endpoint","Base network API"],"warnings":["The specific functionality of /api/v1/ach/46 is undocumented and unclear — it does not appear in the site's public API listing.","All documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no content.","No request or response schema is available; callers must discover behavior empirically.","The endpoint path suggests ACH payment functionality, which may fall under financial regulation — verify compliance before use."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/46","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/46","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 no documentation, no request/response schema, and the specific functionality of /api/v1/ach/46 is unknown. The docs, pricing, and README pages are all empty. This is effectively a stub 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'/docs':175 '/pricing':176 '/readme':177 '/request':12,26 '0.02':11,25,75,163 '000':157 '20':156 'ACH API' 'Base network API' 'USDC micropayment endpoint' 'accept':149 'access':109 'ach':5,19,129 'actual':215 'ai/ml':52 'analyt':51 'api':48,80,108,117 'appear':113 'autom':130 'base':8,22,69,158,168 'base-network' 'call':4,18,165 'challeng':143 'clear':131 'collect':42 'commit':87 'confirm':144 'connect':182 'content':188 'data':50,136 'descript':199 'detail':198 'determin':213 'direct':211 'document':98,173,194 'endpoint':6,20,30,58,95,146,203,210 'exampl':196 'financ':53 'function':91,216 'homepag':121 'hous':132 'http-post' 'i.e':162 'infrastructur':54 'key':81 'label':104 'limit':84 'list':72,118 'live':148 'lowpaymentfee' 'lowpaymentfee.com':37 'main':116 'may':126 'network':70,169 'offer':40 'page':174 'part':34 'path':123 'pay':2,16,45 'pay-per-cal':1,15 'pay-per-request':44 'payment':62,133 'payment processing API' 'per':3,17,46,76,164 'platform':38,171 'post':150 'premium':107 'price':73 'process':134 'prompt':184 'prospect':205 'protocol':63 'rate':83 'relat':127 'request':47,77,151 'request/response':195 'requir':88,153 'return':179,204 'schema':193 'settl':64 'site':101 'span':49 'specif':90 'specul':140 'substant':187 'suggest':124 'test':208 'unit':159 'usdc':14,28,66,161 'usdc-settlement' 'use':59 'user':206 'via':9,23 'wallet':183 'x402':10,24,61,142 'x402 API' 'x402-payment'","prices":[{"id":"308eee16-cf3b-44f4-acd0-49f334e64572","listingId":"1df433a1-8a24-424f-a060-2950d7238edb","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:13.134Z"}],"sources":[{"listingId":"1df433a1-8a24-424f-a060-2950d7238edb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/46","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:13.134Z","lastSeenAt":"2026-04-27T12:13:02.311Z"}],"details":{"listingId":"1df433a1-8a24-424f-a060-2950d7238edb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/46 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The platform lists APIs at $0.02/request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC (USD Coin, 6 decimals = $0.02) on the Base network.","source_url":"https://lowpaymentfee.com/api/v1/ach/46"},{"claim":"Documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no substantive content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing ACH-related data or functionality on a per-call basis without API keys","Integrating pay-per-use financial endpoints into agent workflows","Testing x402 payment protocol integrations with low-cost endpoints"],"bestFor":["Developers experimenting with x402 pay-per-call APIs","Agents needing keyless, on-demand API access settled in USDC on Base","Low-volume or sporadic usage where subscription pricing is wasteful"],"notFor":["Users who need detailed API documentation before integrating","High-volume production workloads requiring guaranteed SLAs or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.955Z"},"updatedAt":"2026-04-27T12:13:02.311Z"}}