{"id":"1c897b71-1845-4d6d-8aa5-d95977802d5c","shortId":"zrguSA","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/145` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific function of the `/api/v1/ach/145` path is not documented — the provider labels it generically as \"Premium API Access\" — so the exact data or service it returns is unclear. The platform advertises a flat $0.02 per request across all its endpoints, and the x402 challenge confirms a `maxAmountRequired` of 20,000 base units of USDC (6 decimals), which equals $0.02.\n\nThe broader lowpaymentfee.com site lists endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). All endpoints share the same pricing model: no API keys, no rate limits, no minimums, instant access, payment on Base.\n\nThe endpoint is live and returns a valid x402 402 challenge. However, there is no OpenAPI schema, no documentation beyond the landing page listing, and no example request/response payloads available. The `/docs`, `/api`, `/pricing`, and `/README` pages all render only a \"Connect wallet\" prompt with no additional content. The specific purpose of the `/ach/145` route (possibly ACH payment-related) cannot be confirmed from available materials.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ach"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment API","lowpaymentfee","x402 API","USDC micropayment","Base network API","pay-per-call API"],"warnings":["The specific function of /api/v1/ach/145 is undocumented — 'Premium API Access' is a generic label applied to the endpoint","No OpenAPI schema, example payloads, or meaningful documentation available","The /docs, /pricing, /api, and /README pages all render only 'Connect wallet' with no content","The 'ACH' in the path suggests ACH bank transfer functionality but this cannot be confirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/145","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/145","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 /api/v1/ach/145 actually does, no OpenAPI schema, no example requests or responses, and the docs/pricing/README pages are all empty beyond a wallet-connect prompt. The listing is effectively a 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'/api':221 '/api/v1/ach/145':40,74 '/docs':220 '/pricing':222 '/readme':224 '/request':12,30 '0.02':11,29,103,128 '000':119 '20':118 '402':198 '6':124 'ACH API' 'Base network API' 'USDC micropayment' 'access':87,185 'ach':5,23,245 'across':106,135 'addit':235 'advertis':100 'ai':145 'analysi':149 'analyt':139 'api':16,34,57,86,177 'avail':218,253 'base':8,26,65,120,188 'base-network' 'beyond':208 'broad':50 'broader':130 'call':4,22 'cannot':249 'catalog':51 'categori':137 'challeng':113,199 'classif':151 'confirm':114,251 'connect':230 'content':236 'convers':167 'data':91,138,142 'decim':125 'document':78,207 'embed':152 'endpoint':6,24,38,109,134,170,190 'equal':127 'estim':162 'exact':90 'exampl':215 'exchang':157 'export':143 'feed':156 'financ':153 'flat':102 'four':136 'function':71 'gas':161 'generat':168 'generic':83 'geocod':165 'howev':200 'infrastructur':164 'insight':144 'instant':184 'key':17,35,178 'label':81 'land':210 'learn':147 'limit':181 'list':133,212 'live':192 'lowpaymentfee' 'lowpaymentfee.com':45,131 'machin':146 'materi':254 'maxamountrequir':116 'metric':140 'minimum':183 'model':175 'network':66 'no-api-key' 'offer':48 'openapi':204 'page':211,225 'part':42 'path':75 'pay':2,20,54 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':53 'payload':217 'payment':186,247 'payment API' 'payment-rel':246 'per':3,21,55,104 'platform':46,99 'possibl':244 'premium':85 'price':155,174 'prompt':232 'protocol':62 'provid':80 'purpos':239 'quot':160 'rate':158,180 'relat':248 'render':227 'report':141 'request':56,105 'request/response':216 'requir':18,36 'return':95,194 'rout':243 'schema':205 'sentiment':148 'servic':93 'settl':58 'share':171 'site':132 'specif':70,238 'summar':150 'token':159 'unclear':97 'unit':121 'usdc':14,32,68,123 'usdc-settlement' 'use':67 'valid':166,196 'via':9,27,59 'wallet':231 'web3':154 'x402':10,28,61,112,197 'x402 API' 'x402-payment'","prices":[{"id":"3866f1bc-349a-485c-8077-3fadb9b7878c","listingId":"1c897b71-1845-4d6d-8aa5-d95977802d5c","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/145","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:58.562Z"}],"sources":[{"listingId":"1c897b71-1845-4d6d-8aa5-d95977802d5c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/145","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:58.562Z","lastSeenAt":"2026-04-27T15:05:15.868Z"}],"details":{"listingId":"1c897b71-1845-4d6d-8aa5-d95977802d5c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/145 \\\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 platform charges $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge confirms maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/145"},{"claim":"The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to an ACH-related service with per-call USDC payment","Agent-driven API consumption without pre-registration or API keys","Integrating pay-as-you-go endpoints into automated workflows on Base"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Prototyping workflows that need instant API access without rate limits"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume production use cases where per-call pricing at $0.02 may add up","Anyone needing clarity on exactly what data this specific endpoint returns"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.654Z"},"updatedAt":"2026-04-27T15:05:15.868Z"}}