{"id":"beed7bc6-d93c-4b35-8bde-0077e9ae159a","shortId":"YTCVVb","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/185` 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 protocol on the Base network, accepting USDC payments with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/ach/185` is listed under the generic title \"Premium API Access.\" The x402 challenge confirms it is live, accepting POST requests and settling payments in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The maximum amount required is 20,000 base units, which at 6 decimals for USDC equals $0.02 per request. The payment timeout is 300 seconds.\n\nHowever, the exact functionality of this particular endpoint (`/ach/185`) is unclear. It does not appear in the site's publicly listed API catalog, and no documentation, request schema, or response schema is available. The site's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. Without knowing what data or service this endpoint returns, consumers should treat it as an opaque paid endpoint until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","http-post"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment API","lowpaymentfee","x402 endpoint","USDC micropayment","Base network API","pay-per-call API"],"warnings":["The exact functionality of /api/v1/ach/185 is undocumented — the endpoint name suggests ACH (Automated Clearing House) but this is unverified.","No request or response schema is available; consumers cannot know what to send or what to expect back.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no further information.","This endpoint does not appear in the site's publicly listed API catalog."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/185","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/185","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the specific purpose of /api/v1/ach/185 is unknown. The docs pages render only a wallet-connect prompt with no usable 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'/api/v1/ach/185':32,86 '/request':12,26 '0.02':11,25,131 '000':121 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':112 '20':120 '300':138 '6':126 'ACH API' 'Base network API' 'USDC micropayment' 'accept':69,103 'access':95 'ach':5,19 'ai/ml':52 'amount':117 'analyt':51 'api':48,74,94,161,179 'appear':154 'avail':172 'base':8,22,67,114,122 'base-network' 'call':4,18 'catalog':162 'challeng':98 'collect':42 'commit':81 'confirm':99 'connect':185 'consum':201 'content':191 'contract':111 'crypto':55 'data':50,195 'decim':127 'doc':176 'document':165,212 'endpoint':6,20,30,60,85,147,199,209 'equal':130 'exact':142 'financ':54 'function':143 'generic':91 'howev':140 'http-post' 'infer':53 'key':75 'know':193 'limit':78 'list':88,160 'live':102 'lowpaymentfee' 'lowpaymentfee.com':37 'maximum':116 'network':68 'no-api-key' 'offer':40 'opaqu':207 'page':180 'paid':208 'part':34 'particular':146 'pay':2,16,45 'pay-per-cal':1,15 'pay-per-call API' 'pay-per-request':44 'payment':71,108,135 'payment API' 'per':3,17,46,132 'platform':38 'post':104 'premium':93 'price':177 'prompt':187 'protocol':64 'public':159 'rate':77 'render':182 'request':47,105,133,166 'requir':82,118 'respons':169 'return':200 'schema':167,170 'second':139 'servic':58,197 'settl':107 'site':157,174 'span':49 'specif':84 'surfac':213 'timeout':136 'titl':92 'treat':203 'unclear':150 'unit':123 'usdc':14,28,70,110,129 'usdc-settlement' 'use':61 'util':57 'via':9,23 'wallet':186 'without':192 'x402':10,24,63,97 'x402 endpoint' 'x402-payment'","prices":[{"id":"35e8aeb7-8e87-4740-90cc-2af4c4922834","listingId":"beed7bc6-d93c-4b35-8bde-0077e9ae159a","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/185","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:08.839Z"}],"sources":[{"listingId":"beed7bc6-d93c-4b35-8bde-0077e9ae159a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/185","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:08.839Z","lastSeenAt":"2026-04-27T12:13:02.185Z"}],"details":{"listingId":"beed7bc6-d93c-4b35-8bde-0077e9ae159a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/185 \\\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 status 402 with maxAmountRequired 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/185"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/185"},{"claim":"Site advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages render only a Connect wallet prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to an ACH-related service with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Integrating x402-compatible endpoints into automated pipelines without subscription overhead"],"bestFor":["Developers or agents already using x402 protocol on Base","Use cases requiring no-signup, no-API-key access","Low-volume or bursty workloads where per-call pricing is preferable"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where subscription pricing would be cheaper","Anyone who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.163Z"},"updatedAt":"2026-04-27T12:13:02.185Z"}}