{"id":"73455801-837e-41e0-b2b4-60aad84162ba","shortId":"GXgKZh","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":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints settled via the x402 protocol on the Base network using USDC. The specific endpoint at `/api/v1/ach/88` is listed as \"Premium API Access\" and accepts POST requests. Payment is made per-call with no API keys, no rate limits, and no upfront commitments — each request costs $0.02 (20,000 base units of USDC with 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises endpoints across several categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced uniformly at $0.02 per request.\n\nHowever, the specific functionality behind `/api/v1/ach/88` is not documented beyond the generic label \"Premium API Access.\" The path suggests it may relate to ACH (Automated Clearing House) payment processing or data, but no schema, request/response examples, or detailed documentation are available. The docs, pricing, and API pages on the site all render only a \"Connect wallet\" prompt with no further content. Callers should treat this endpoint with caution until its actual behavior is verified.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","x402 endpoint","USDC micropayment API","lowpaymentfee","pay-per-call API","Base network API"],"warnings":["No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no content.","The actual functionality of /api/v1/ach/88 is unknown; 'Premium API Access' is a generic label with no specifics.","No request or response schema is provided; callers cannot know what to send or what to expect back.","The 'ach' path segment suggests possible financial/payment functionality which may be subject to regulatory requirements."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/88","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/88","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge), but there is no documentation, no request/response schema, and no explanation of what '/api/v1/ach/88' actually does. The site's docs/pricing/API pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':12,30 '0.02':11,29,94,152 '000':96 '20':95 '6':102 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':71 'access':69,170 'ach':5,23,178 'across':110 'actual':225 'advertis':108 'ai':120 'analysi':124 'analyt':114 'api':16,34,46,68,82,169,200 'autom':179 'avail':195 'base':8,26,55,97 'base-network' 'behavior':226 'behind':159 'beyond':164 'broader':105 'call':4,22,79 'caller':216 'categori':112 'caution':222 'classif':127 'clear':180 'collect':40 'commit':90 'connect':209 'content':215 'convers':144 'cost':93 'data':113,117,185 'decim':103 'detail':192 'doc':197 'document':163,193 'embed':128 'endpoint':6,24,47,61,109,147,220 'estim':138 'exampl':190 'exchang':133 'export':118 'feed':132 'financ':129 'function':158 'gas':137 'generat':145 'generic':166 'geocod':142 'host':38 'hous':181 'howev':155 'infrastructur':140 'insight':119 'key':17,35,83 'label':167 'learn':122 'limit':86 'list':65 'lowpaymentfee' 'lowpaymentfee.com':37,106 'machin':121 'made':76 'may':175 'metric':115 'network':56 'no-api-key' 'page':201 'path':172 'pay':2,20,43 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':42 'payment':74,182 'payment processing API' 'per':3,21,44,78,153 'per-cal':77 'platform':107 'post':72 'post-endpoint' 'premium':67,168 'price':131,149,198 'process':183 'prompt':211 'protocol':52 'quot':136 'rate':85,134 'relat':176 'render':206 'report':116 'request':45,73,92,154 'request/response':189 'requir':18,36 'schema':188 'sentiment':123 'settl':48 'sever':111 'site':204 'specif':60,157 'suggest':173 'summar':126 'text':125 'token':135 'treat':218 'uniform':150 'unit':98 'upfront':89 'usdc':14,32,58,100 'usdc-settlement' 'use':57 'util':141 'valid':143 'verifi':228 'via':9,27,49 'wallet':210 'web3':130 'x402':10,28,51 'x402 endpoint' 'x402-payment'","prices":[{"id":"4279b873-33d7-4e66-b1db-024a56327434","listingId":"73455801-837e-41e0-b2b4-60aad84162ba","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/88","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:24.646Z"}],"sources":[{"listingId":"73455801-837e-41e0-b2b4-60aad84162ba","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/88","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:24.646Z","lastSeenAt":"2026-04-27T09:33:29.916Z"}],"details":{"listingId":"73455801-837e-41e0-b2b4-60aad84162ba","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/88 \\\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/88"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/88"}],"useCases":["Programmatic access to an ACH-related service with per-call USDC payment","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-signup, pay-per-request API access","AI agents that can settle x402 payments in USDC on Base","Prototyping workflows that need instant, keyless API access"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where per-request pricing at $0.02 adds up significantly","Anyone who cannot settle payments in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.472Z"},"updatedAt":"2026-04-27T09:33:29.916Z"}}