{"id":"5551de0e-7c0f-4fe4-9001-9af8bf0e03f1","shortId":"W2dyqQ","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/157` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The pricing is uniform at $0.02 per request (20,000 base units of USDC with 6 decimals), with no API keys, rate limits, or upfront commitments required.\n\nThe specific function of the `/api/v1/ach/157` endpoint is not documented beyond the generic label \"Premium API Access.\" The provider's landing page lists many categorized endpoints (analytics, AI, finance, utilities), but this particular ACH-prefixed path does not appear among them. It accepts HTTP POST requests and returns `application/json`. Without further documentation or example responses, the exact data or service this endpoint provides remains unclear — it may relate to ACH (Automated Clearing House) payment data or processing given the path naming convention.\n\nThe platform's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional technical documentation, schemas, or usage examples. This makes it difficult to assess the actual functionality or reliability of the endpoint beyond confirming it is live and correctly issuing x402 payment challenges.","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","pay-per-call API","Base network API"],"warnings":["The specific function of /api/v1/ach/157 is not documented anywhere on the provider's site — the 'Premium API Access' label is generic.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no technical content.","This endpoint path does not appear in the provider's own listed API catalog on the landing page.","No request or response schema is available; integration requires trial-and-error or direct contact with the provider."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/157","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/157","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and the specific purpose of /api/v1/ach/157 is undocumented. The docs pages render only a wallet-connect prompt with no content. This is effectively a stub 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'/request':12,30 '0.02':11,29,84 '000':88 '20':87 '6':94 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':149 'access':122 'ach':5,23,140,176 'ach-prefix':139 'actual':220 'addit':206 'ai':133 'ai/ml':60 'among':146 'analyt':59,132 'api':16,34,56,98,121,195 'appear':145 'application/json':155 'assess':218 'autom':177 'base':8,26,77,89 'base-network' 'beyond':116,227 'call':4,22 'categor':130 'challeng':237 'clear':178 'collect':50 'commit':104 'confirm':228 'connect':201 'convent':188 'correct':233 'data':58,164,181 'decim':95 'difficult':216 'doc':192 'document':115,158,208 'endpoint':6,24,38,66,112,131,168,226 'exact':163 'exampl':160,212 'financ':134 'finance/web3':61 'function':108,221 'generic':118 'given':184 'hous':179 'http':150 'http-post' 'infrastructur':63 'issu':234 'json-response' 'key':17,35,99 'label':119 'land':126 'limit':101 'list':128 'live':231 'low fee API' 'lowpaymentfee.com':45 'make':214 'mani':129 'may':173 'name':187 'network':78 'no-api-key' 'offer':48 'page':127,196 'part':42 'particular':138 'path':142,186 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':70,180,236 'payment API' 'per':3,21,54,85 'platform':46,190 'post':151 'prefix':141 'premium':120 'price':80,193 'process':183 'prompt':203 'protocol':71 'provid':124,169 'rate':100 'relat':174 'reliabl':223 'remain':170 'render':198 'request':55,86,152 'requir':18,36,105 'respons':161 'return':154 'schema':209 'servic':166 'settl':72 'span':57 'specif':107 'technic':207 'unclear':171 'uniform':82 'unit':90 'upfront':103 'usag':211 'usdc':14,32,74,92 'usdc-settlement' 'use':67 'util':64,135 'via':9,27 'wallet':202 'without':156 'x402':10,28,69,235 'x402 endpoint' 'x402-payment'","prices":[{"id":"d5a6af4f-f0af-45ca-bf2d-8aae499a456b","listingId":"5551de0e-7c0f-4fe4-9001-9af8bf0e03f1","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/157","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:59.729Z"}],"sources":[{"listingId":"5551de0e-7c0f-4fe4-9001-9af8bf0e03f1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/157","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:59.729Z","lastSeenAt":"2026-04-27T14:04:42.883Z"}],"details":{"listingId":"5551de0e-7c0f-4fe4-9001-9af8bf0e03f1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/157 \\\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":"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/157"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/157"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to ACH-related data or services via a single micropayment per call","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Integrating low-cost per-request endpoints into automated pipelines without subscription overhead"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents that can settle x402 payments in USDC on Base","Use cases requiring no API key management or rate limit negotiation"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume batch processing where per-request pricing may add up","Anyone needing non-crypto payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.628Z"},"updatedAt":"2026-04-27T14:04:42.883Z"}}