{"id":"3f0dc299-0edd-4957-81a9-e80298fe0ccb","shortId":"3araGB","kind":"x402","title":"Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.","tagline":"Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.","description":"This endpoint at `/api/v1/ach/158` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-call 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/158` path is not documented — the listing title is simply \"Premium API Access\" and the endpoint lives under an `/ach/` path segment, which may relate to ACH (Automated Clearing House) banking data or operations, but this is unconfirmed.\n\nPricing is $0.02 per request (the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC, which at 6 decimals equals $0.02). There are no API keys, no rate limits, and no minimum commitments — callers pay per request by attaching an x402 payment header. The endpoint accepts HTTP POST and returns `application/json`.\n\nThe broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Documentation beyond the landing page is essentially empty (all subpages just show \"Connect wallet\"), so the actual request/response schemas for this and other endpoints are unknown.","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 micropayment API","Base network API","pay-per-call API"],"warnings":["The specific function of /api/v1/ach/158 is undocumented — the 'ACH' path and numeric ID are unexplained.","All documentation pages (docs, api, pricing, README) are effectively empty, showing only 'Connect wallet'.","No request or response schema is available; callers cannot know what payload to send or what to expect back.","The platform lists many endpoint categories but none match the '/ach/' path of this specific endpoint."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/158","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/158","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this specific endpoint does, what inputs it accepts, or what it returns. All doc/pricing/README pages are empty beyond a wallet-connect prompt. The purpose of '/api/v1/ach/158' is entirely 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'/api/v1/ach/158':40,86 '/call':12,30 '0.02':11,29,126,147,212 '000':137 '20':136 '6':144 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':172 'access':98 'ach':5,23,112 'actual':231 'advertis':132 'ai/ml':60 'analysi':190 'analyt':59 'api':16,34,56,97,151 'application/json':177 'attach':165 'autom':113 'bank':116 'base':8,26,79,138 'base-network' 'beyond':216 'broader':179 'call':55 'caller':160 'challeng':131 'classif':193 'clear':114 'collect':50 'commit':159 'connect':227 'convers':205 'crypto':63 'data':58,117,186 'decim':145 'document':90,215 'embed':194 'empti':222 'endpoint':6,24,38,68,101,171,182,238 'equal':146 'essenti':221 'estim':202 'exchang':197 'export':187 'feed':196 'financ':62 'function':83 'gas':201 'generat':207 'geocod':203 'header':169 'hous':115 'http':173 'http-post' 'infer':61 'insight':188 'json-response' 'key':17,35,152 'land':218 'limit':155 'list':92,181 'live':102 'low fee API' 'lowpaymentfee.com':45 'maxamountrequir':134 'may':109 'metric':184 'minimum':158 'network':80 'no-api-key' 'offer':48 'oper':119 'page':219 'part':42 'path':87,106 'pay':2,20,53,161 'pay-per-cal':52 'pay-per-call API' 'pay-per-request':1,19 'payment':72,168 'payment API' 'per':3,21,54,127,162 'platform':46,180 'point':214 'post':174 'premium':96 'price':124,195,213 'protocol':73 'quot':200 'rate':154,198 'relat':110 'report':185 'request':4,22,128,163 'request/response':232 'requir':18,36 'return':176 'schema':233 'segment':107 'sentiment':189 'servic':66 'settl':74 'show':226 'simpli':95 'span':57 'specif':82 'subpag':224 'summar':192 'text':191 'titl':93 'token':199 'unconfirm':123 'unit':139 'unknown':240 'usdc':14,32,76,141 'usdc-settlement' 'use':69 'util':65 'valid':204 'via':9,27 'wallet':228 'x402':10,28,71,130,167 'x402 endpoint' 'x402-payment'","prices":[{"id":"393086af-8b32-48fa-94ed-b87fac3aa1a9","listingId":"3f0dc299-0edd-4957-81a9-e80298fe0ccb","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/158","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:01.513Z"}],"sources":[{"listingId":"3f0dc299-0edd-4957-81a9-e80298fe0ccb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/158","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:01.513Z","lastSeenAt":"2026-04-27T14:04:42.999Z"}],"details":{"listingId":"3f0dc299-0edd-4957-81a9-e80298fe0ccb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/158 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Pricing is $0.02 per request across all listed endpoints","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access, 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/158"}],"useCases":["Programmatic access to an ACH-related service with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API key management","Integrating pay-as-you-go endpoints into automated workflows on Base"],"bestFor":["Developers wanting zero-setup, keyless API access with crypto micropayments","AI agents that can settle x402 payments autonomously on Base","Users who prefer pay-per-use over subscription billing"],"notFor":["Users who need detailed API documentation or request/response schemas before integrating","Applications requiring free or fiat-only payment methods","High-volume use cases where per-request pricing may add up compared to bulk plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.498Z"},"updatedAt":"2026-04-27T14:04:42.999Z"}}