{"id":"14a19253-53e9-4b0c-ac16-6b326e1e7c16","shortId":"xfxTAN","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/191` 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 specific function of the `/api/v1/ach/191` path is not documented — the listing title is simply \"Premium API Access\" and the `/ach/` path segment suggests it may relate to ACH (Automated Clearing House) payment processing or data, but this is unconfirmed.\n\nThe endpoint is live and returns a valid x402 challenge. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The platform advertises no API keys, no rate limits, and instant access. Payment is made via the x402 `exact` scheme to a specified wallet address. The response MIME type is `application/json`.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what data or functionality this specific endpoint provides. The platform lists many endpoints across categories but provides no detailed documentation for any of them.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","ach-endpoint"],"categories":["finance","payments"],"synonyms":["ACH API","payment processing API","lowpaymentfee","x402 API","USDC micropayment API","Base network API","pay-per-call API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","The specific function of /api/v1/ach/191 is unknown; the 'ach' path segment is suggestive but unconfirmed","No request or response schema is provided","No OpenAPI or machine-readable API specification found","The platform lists many endpoint categories but none have detailed documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/191","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/191","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 this endpoint actually does, what inputs it accepts, or what it returns. No OpenAPI schema, no examples, and no meaningful docs pages. The purpose of '/api/v1/ach/191' is entirely 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'/api/v1/ach/191':32,76 '/request':12,26 '0.02':11,25,134 '000':125 '20':124 '6':130 'ACH API' 'Base network API' 'USDC micropayment API' 'access':88,148 'ach':5,19,99 'ach-endpoint' 'across':215 'addit':188 'address':161 'advertis':139 'ai/ml':52 'analyt':51 'api':48,87,141,174 'application/json':167 'autom':100 'base':8,22,69,126 'base-network' 'call':4,18 'categori':216 'challeng':120 'clear':101 'collect':42 'connect':183 'content':189 'data':50,106,203 'decim':131 'descript':200 'detail':220 'doc':173 'document':80,168,221 'endpoint':6,20,30,58,112,208,214 'equal':133 'exact':155 'exampl':197 'extrem':170 'financ':53 'function':73,205 'hous':102 'infrastructur':54 'instant':147 'json-response' 'key':142 'limit':145 'list':82,212 'live':114 'lowpaymentfee' 'lowpaymentfee.com':37 'made':151 'mani':213 'may':96 'mime':164 'network':70 'no-api-key' 'offer':40 'openapi':193 'page':178 'part':34 'path':77,92 'pay':2,16,45 'pay-per-cal':1,15 'pay-per-call API' 'pay-per-request':44 'payment':62,103,149 'payment processing API' 'per':3,17,46,135 'platform':38,138,211 'premium':86 'price':122,175 'process':104 'prompt':185 'protocol':63 'provid':209,218 'rate':144 'readm':177 'relat':97 'render':180 'request':47,136 'request/response':196 'respons':163 'return':116 'schema':194 'scheme':156 'segment':93 'settl':64 'simpli':85 'span':49 'spars':171 'specif':72,207 'specifi':159 'suggest':94 'titl':83 'type':165 'unconfirm':110 'unit':127 'usdc':14,28,66,129 'usdc-settlement' 'use':59 'valid':118 'via':9,23,152 'wallet':160,184 'x402':10,24,61,119,154 'x402 API' 'x402-payment'","prices":[{"id":"a928a9d4-ff1b-49fb-b1c8-dcce90c65811","listingId":"14a19253-53e9-4b0c-ac16-6b326e1e7c16","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/191","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":"14a19253-53e9-4b0c-ac16-6b326e1e7c16","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/191","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:13.134Z","lastSeenAt":"2026-04-24T22:32:11.600Z"}],"details":{"listingId":"14a19253-53e9-4b0c-ac16-6b326e1e7c16","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/191 \\\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":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/191"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/191"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing ACH-related data or functionality on a per-request basis","Integrating pay-per-call financial endpoints into agent workflows","Testing x402 payment protocol integrations with low-cost endpoints"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing pay-per-call access without API key management","Low-volume, on-demand API consumption with crypto settlement"],"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":"2026-02-17T23:14:30.955Z"},"updatedAt":"2026-04-24T22:32:11.600Z"}}