{"id":"51aa2de9-1756-409f-8cd0-e14cb82e06b6","shortId":"ccQneg","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/90` 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/90` route is not documented — the path suggests it may relate to ACH (Automated Clearing House) payment processing or data, with \"90\" possibly being a parameter (e.g., a 90-day window), but this is speculative. The provider's landing page lists categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities, all priced at $0.02 per request.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0x8335…) on Base. Since USDC uses 6 decimals, this equals $0.02 per call. Payment is made via the x402 `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a 300-second timeout. No API keys or rate limits are advertised — access is gated purely by micropayment.\n\nDocumentation is extremely thin. The `/docs`, `/api`, `/pricing`, and `/README` pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no explanation of what this specific endpoint returns. Prospective users should be aware that the actual functionality behind this route is undocumented.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","pay-per-request","no-api-key","ach-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","lowpaymentfee","x402 micropayment API","USDC pay-per-call","Base network API","automated clearing house"],"warnings":["No documentation exists for /api/v1/ach/90 — its actual functionality is unknown","All doc/pricing/README pages render only 'Connect wallet' with no content","No OpenAPI spec or request/response schema available","The meaning of 'ach/90' in the path is unverified — could be ACH-related or an arbitrary route"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/90","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/90","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, confirming pricing and network. However, there is zero documentation on what this specific endpoint does, no request/response schema, and no examples. The docs pages are empty. The endpoint's purpose (ACH/90) is entirely 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'/api/v1/ach/90':40,74 '/docs':204 '/pricing':206 '/readme':208 '/request':12,30 '0.02':11,29,130,166 '000':151 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':179 '0x8335':156 '20':150 '300':182 '6':162 '90':95,102 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':141 'access':193 'ach':5,23,86 'ach-endpoint' 'actual':245 'address':178 'advertis':192 'ai':119 'analyt':118 'api':16,34,57,186 'autom':87 'automated clearing house' 'awar':242 'base':8,26,65,152,158 'base-network' 'behind':247 'broad':50 'call':4,22,168 'catalog':51 'categori':115 'challeng':135 'clear':88 'confirm':136 'connect':214 'content':220 'data':93,117 'day':103 'decim':163 'document':78,199 'e.g':100 'endpoint':6,24,38,138,236 'equal':165 'exact':175 'explan':231 'extrem':201 'financ':122 'function':71,246 'gate':195 'hous':89 'includ':116 'infrastructur':125 'key':17,35,187 'land':112 'learn':121 'limit':190 'list':114 'live':140 'lowpaymentfee' 'lowpaymentfee.com':45 'machin':120 'made':171 'may':83 'micropay':198 'network':66 'no-api-key' 'offer':48 'openapi':224 'page':113,209 'paramet':99 'part':42 'path':80 'pay':2,20,54 'pay-per-cal':1,19 'pay-per-request':53 'payment':90,146,169 'payment processing API' 'per':3,21,55,131,167 'platform':46 'possibl':96 'post':142 'price':128 'process':91 'prompt':216 'prospect':238 'protocol':62 'provid':110 'pure':196 'rate':189 'relat':84 'render':211 'request':56,132,143 'request/response':227 'requir':18,36,145 'return':237 'rout':75,249 'schema':228 'scheme':176 'second':183 'settl':58 'sinc':159 'spec':225 'specif':70,235 'specul':108 'suggest':81 'thin':202 'timeout':184 'undocu':251 'unit':153 'usdc':14,32,68,155,160 'usdc-micropayment' 'use':67,161 'user':239 'util':126 'via':9,27,59,172 'wallet':215 'web3':123 'window':104 'x402':10,28,61,134,174 'x402 micropayment API' 'x402-payment'","prices":[{"id":"bdee42d2-5437-4235-9267-a890de1c2f96","listingId":"51aa2de9-1756-409f-8cd0-e14cb82e06b6","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/90","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":"51aa2de9-1756-409f-8cd0-e14cb82e06b6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:24.646Z","lastSeenAt":"2026-04-27T09:04:37.053Z"}],"details":{"listingId":"51aa2de9-1756-409f-8cd0-e14cb82e06b6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/90 \\\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/90"},{"claim":"All APIs are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to ACH-related data or operations via micropayment","Agent-driven financial workflows that need per-call payment without subscriptions","Integrating low-cost payment-gated API calls into Web3 applications"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access on Base","AI agents with USDC wallets needing frictionless endpoint access","Prototyping financial integrations without API key management"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume production workloads where $0.02/request adds up without bulk discounts","Anyone needing non-crypto payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.471Z"},"updatedAt":"2026-04-27T09:04:37.053Z"}}