{"id":"04f4da25-cae3-449b-8982-29df1f27b1b4","shortId":"eXweBn","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/184` 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 pricing model is simple: $0.02 per request with no API keys, no rate limits, and no minimum commitments.\n\nThe specific endpoint `/api/v1/ach/184` is listed under the title \"Premium API Access\" but its exact functionality is unclear from available documentation. The path segment \"ach\" suggests it may relate to ACH (Automated Clearing House) banking or payment data, and \"184\" appears to be a resource identifier, but no schema, parameter documentation, or example responses are available. The broader platform advertises categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities, all at the same $0.02 price point.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and requiring payment of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, which equals $0.02. The payment scheme is \"exact\" with a 300-second timeout. No OpenAPI spec, detailed docs, or example payloads were found — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","no-api-key","post-endpoint","ach-data"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment data API","lowpaymentfee","x402 API","Base USDC API","automated clearing house","pay-per-call API"],"warnings":["No API documentation available — docs, pricing, and README pages only show 'Connect wallet'","The exact purpose and parameters of /api/v1/ach/184 are unknown; 'Premium API Access' is the only description","No OpenAPI spec or output schema provided beyond basic HTTP method info","No example request or response payloads available","The 'ach' path segment suggests possible financial/banking data but this is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/184","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/184","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of the /api/v1/ach/184 endpoint is not explained anywhere. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':12,30 '0.02':11,29,86,176,205 '000':195 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':200 '184':139 '20':194 '300':213 'ACH API' 'Base USDC API' 'accept':187 'access':111 'ach':5,23,124,130 'ach-data' 'advertis':159 'ai':164 'ai/ml':60 'analyt':59,163 'api':16,34,56,91,110,229 'appear':140 'autom':131 'automated clearing house' 'avail':119,155 'bank':134 'base':8,26,79,196,202 'broader':157 'call':4,22 'categori':160 'challeng':181 'clear':132 'collect':50 'commit':99 'confirm':182 'connect':237 'content':243 'crypto':63 'data':58,137,162 'detail':219 'doc':220,227 'document':120,150 'endpoint':6,24,38,68,102,184 'equal':204 'exact':114,210 'exampl':152,222 'financ':62,167 'found':225 'function':115 'hous':133 'identifi':145 'includ':161 'infer':61 'infrastructur':170 'key':17,35,92 'learn':166 'limit':95 'list':105 'live':186 'lowpaymentfee' 'lowpaymentfee.com':45 'machin':165 'may':127 'minimum':98 'model':83 'network':80 'no-api-key' 'offer':48 'openapi':217 'page':232 'paramet':149 'part':42 'path':122 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payload':223 'payment':72,136,192,207 'payment data API' 'per':3,21,54,87 'platform':46,158 'point':178 'post':188 'post-endpoint' 'premium':109 'price':82,177,228 'prompt':239 'protocol':73 'rate':94 'readm':231 'relat':128 'render':234 'request':55,88,189 'requir':18,36,191 'resourc':144 'respons':153 'schema':148 'scheme':208 'second':214 'segment':123 'servic':66 'settl':74 'simpl':85 'span':57 'spec':218 'specif':101 'substant':242 'suggest':125 'timeout':215 'titl':108 'unclear':117 'unit':197 'usdc':14,32,76,199 'usdc-base' 'use':69 'util':65,171 'via':9,27 'wallet':238 'web3':168 'x402':10,28,71,180 'x402 API' 'x402-payment'","prices":[{"id":"b7b9eb3e-b142-4ef1-b85d-00849fa9ac09","listingId":"04f4da25-cae3-449b-8982-29df1f27b1b4","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/184","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:10.625Z"}],"sources":[{"listingId":"04f4da25-cae3-449b-8982-29df1f27b1b4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/184","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:10.625Z","lastSeenAt":"2026-04-27T12:13:02.267Z"}],"details":{"listingId":"04f4da25-cae3-449b-8982-29df1f27b1b4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/184 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/184"},{"claim":"All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/184"},{"claim":"The platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing ACH or payment-related data on a per-request basis without subscription","Integrating pay-per-call financial endpoints into agent workflows","Programmatic access to premium data without managing API keys"],"bestFor":["Agents needing on-demand financial or payment data with crypto micropayments","Developers who want zero-commitment, pay-as-you-go API access","x402-compatible clients settling on Base in USDC"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.068Z"},"updatedAt":"2026-04-27T12:13:02.267Z"}}