{"id":"e61084b1-5906-4f13-b76e-63460132c5fa","shortId":"9Pun3q","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/134` 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/134` endpoint is not documented beyond its listing title \"Premium API Access\" — it sits under a path prefix suggesting ACH (Automated Clearing House) banking functionality, but no schema, input parameters, or response format are provided.\n\nThe x402 challenge is live and well-formed. It requires an exact payment of 20,000 base units of USDC (contract `0x8335…2913` on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises no API keys, no rate limits, and instant access. Payment is made via the `X-PAYMENT` header per the x402 protocol. The endpoint accepts POST requests.\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 spec, no request/response schema, and no explanation of what data or service this particular endpoint returns. Prospective callers should be aware that the actual functionality behind this endpoint is unclear from available materials.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ach-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","low fee API","x402 API","USDC pay-per-call","Base network API","automated clearing house"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; the actual function of /api/v1/ach/134 is unknown.","The endpoint path suggests ACH banking functionality but this is unconfirmed — the title is generic ('Premium API Access').","Cannot verify what data or service is returned without making a paid request."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/134","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/134","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the /api/v1/ach/134 endpoint actually does. The docs pages are empty. This is effectively a stub 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'/api/v1/ach/134':40,86 '/docs':191 '/pricing':193 '/readme':195 '/request':12,30 '0.02':11,29,149 '000':137 '0x8335':143 '20':136 '2913':144 '6':154 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':183 'access':97,167 'ach':5,23,105 'ach-endpoint' 'actual':235 'addit':206 'advertis':158 'ai/ml':60 'analyt':59 'api':16,34,56,96,160 'autom':106 'automated clearing house' 'avail':243 'awar':232 'bank':109 'base':8,26,79,138,146 'base-network' 'behind':237 'beyond':91 'call':4,22 'caller':229 'challeng':123 'clear':107 'collect':50 'connect':201 'content':207 'contract':142 'crypto':63 'data':58,221 'decim':155 'document':90,186 'endpoint':6,24,38,68,87,182,226,239 'equal':148 'exact':133 'explan':218 'extrem':188 'financ':62 'form':129 'format':118 'function':83,110,236 'header':176 'hous':108 'infer':61 'input':114 'instant':166 'key':17,35,161 'limit':164 'list':93 'live':125 'low fee API' 'lowpaymentfee.com':45 'made':170 'materi':244 'network':80 'no-api-key' 'offer':48 'openapi':211 'page':196 'paramet':115 'part':42 'particular':225 'path':102 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-request':52 'payment':72,134,168,175 'payment processing API' 'per':3,21,54,150,177 'platform':46,157 'post':184 'prefix':103 'premium':95 'prompt':203 'prospect':228 'protocol':73,180 'provid':120 'rate':163 'render':198 'request':55,151,185 'request/response':214 'requir':18,36,131 'respons':117 'return':227 'schema':113,215 'servic':66,223 'settl':74 'sit':99 'span':57 'spars':189 'spec':212 'specif':82 'suggest':104 'titl':94 'unclear':241 'unit':139 'usdc':14,32,76,141,152 'usdc-settlement' 'use':69,153 'util':65 'via':9,27,171 'wallet':202 'well':128 'well-form':127 'x':174 'x-payment':173 'x402':10,28,71,122,179 'x402 API' 'x402-payment'","prices":[{"id":"0fdd4978-1668-455a-9aee-a47d65043fb9","listingId":"e61084b1-5906-4f13-b76e-63460132c5fa","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/134","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:57.930Z"}],"sources":[{"listingId":"e61084b1-5906-4f13-b76e-63460132c5fa","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/134","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:57.930Z","lastSeenAt":"2026-04-27T15:05:15.801Z"}],"details":{"listingId":"e61084b1-5906-4f13-b76e-63460132c5fa","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/134 \\\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 x402 challenge returns 402 with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/134"},{"claim":"Platform advertises $0.02/request pricing 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/134"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to ACH-related data or operations via micropayment","Agent-driven financial workflows requiring per-call payment without subscriptions","Integrating pay-as-you-go banking endpoints into automated pipelines"],"bestFor":["Developers wanting zero-commitment, per-request API access settled in USDC","AI agents that can pay via x402 on Base network","Users who prefer no API key or account signup"],"notFor":["Anyone needing detailed documentation or guaranteed SLAs before integration","Use cases requiring bulk/batch processing at volume discounts","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.663Z"},"updatedAt":"2026-04-27T15:05:15.801Z"}}