{"id":"b8377e43-0ab9-411d-a063-4a92411b6c99","shortId":"jDXVC6","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/105` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The pricing is uniform at $0.02 per request (20,000 base units of USDC with 6 decimals), with no API keys, rate limits, or upfront commitments required.\n\nThe specific function of the `/api/v1/ach/105` endpoint is not documented beyond the generic label \"Premium API Access.\" The provider's site lists many categorized endpoints (analytics, AI, finance, utilities), but this particular path does not appear in any of those categories. It accepts HTTP POST requests and returns `application/json`. Without further documentation or example responses, the exact data or service this endpoint provides remains unclear — the \"ach\" path segment suggests it may relate to ACH (Automated Clearing House) banking or payment data, but this is speculative.\n\nThe endpoint is confirmed live: it returns a proper x402 402 challenge with payment details. The provider's landing page loads successfully (HTTP 200), but documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all render only a \"Connect wallet\" prompt with no substantive content. This makes it difficult to determine input parameters, expected output format, or the precise service offered by this endpoint.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","http-post","json-response"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment API","low fee API","x402 endpoint","USDC pay-per-call","Base network API","micropayment API"],"warnings":["The exact function of /api/v1/ach/105 is undocumented — 'Premium API Access' is a generic label","All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content","This endpoint does not appear in the provider's own listed API catalog on the homepage","No input parameters or output schema are documented anywhere","The 'ach' path segment may imply financial/banking data, which could be a regulated category"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/105","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/105","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 schema, no examples, and the purpose of this specific endpoint (/api/v1/ach/105) is unknown. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt. This is effectively a stub 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'/api/v1/ach/105':40,111 '/docs':219 '/pricing':220 '/readme':222 '/request':12,30 '0.02':11,29,84 '000':88 '20':87 '200':215 '402':202 '6':94 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':148 'access':122 'ach':5,23,172,180 'ai':132 'ai/ml':60 'analyt':59,131 'api':16,34,56,98,121 'appear':141 'application/json':154 'autom':181 'bank':184 'base':8,26,77,89 'base-network' 'beyond':116 'call':4,22 'categor':129 'categori':146 'challeng':203 'clear':182 'collect':50 'commit':104 'confirm':195 'connect':227 'content':233 'data':58,163,187 'decim':95 'detail':206 'determin':239 'difficult':237 'document':115,157,217 'endpoint':6,24,38,66,112,130,167,193,252 'exact':162 'exampl':159 'expect':242 'financ':133 'finance/web3':61 'format':244 'function':108 'generic':118 'hous':183 'http':149,214 'http-post' 'infrastructur':63 'input':240 'json-response' 'key':17,35,99 'label':119 'land':210 'limit':101 'list':127 'live':196 'load':212 'low fee API' 'lowpaymentfee.com':45 'make':235 'mani':128 'may':177 'micropayment API' 'network':78 'no-api-key' 'offer':48,249 'output':243 'page':211,218 'paramet':241 'part':42 'particular':137 'path':138,173 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-request':52 'payment':70,186,205 'payment API' 'per':3,21,54,85 'platform':46 'post':150 'precis':247 'premium':120 'price':80 'prompt':229 'proper':200 'protocol':71 'provid':124,168,208 'rate':100 'relat':178 'remain':169 'render':224 'request':55,86,151 'requir':18,36,105 'respons':160 'return':153,198 'segment':174 'servic':165,248 'settl':72 'site':126 'span':57 'specif':107 'specul':191 'substant':232 'success':213 'suggest':175 'unclear':170 'uniform':82 'unit':90 'upfront':103 'usdc':14,32,74,92 'usdc-settlement' 'use':67 'util':64,134 'via':9,27 'wallet':228 'without':155 'x402':10,28,69,201 'x402 endpoint' 'x402-payment'","prices":[{"id":"2a3d9ba5-e501-4b02-a607-08e479f4d7fc","listingId":"b8377e43-0ab9-411d-a063-4a92411b6c99","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/105","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:48.810Z"}],"sources":[{"listingId":"b8377e43-0ab9-411d-a063-4a92411b6c99","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/105","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:48.810Z","lastSeenAt":"2026-04-27T16:34:09.173Z"}],"details":{"listingId":"b8377e43-0ab9-411d-a063-4a92411b6c99","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/105 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Uniform pricing of $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/105"},{"claim":"The provider lists categorized APIs for data/analytics, AI/ML, finance/Web3, and infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing ACH-related data or services on a per-call basis without subscription","Agent-driven API consumption with automatic USDC micropayments on Base","Integrating pay-per-use financial endpoints into automated workflows"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Projects needing low-cost per-request pricing without API key management"],"notFor":["Users who need detailed API documentation before integrating","High-volume consumers who would benefit from bulk/subscription pricing","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.074Z"},"updatedAt":"2026-04-27T16:34:09.173Z"}}