{"id":"16218764-af38-4921-af00-5a8a8024da7f","shortId":"GRSAUz","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/69` 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 payment protocol, settling in USDC on the Base network. The specific function of the `/api/v1/ach/69` path is not documented — the listing title is simply \"Premium API Access\" and no schema or documentation describes what this particular route returns. It may relate to ACH (Automated Clearing House) banking data or operations, but this is speculative based solely on the URL path.\n\nPricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). Payment is handled inline via the x402 `X-PAYMENT` header — no API keys, accounts, or rate limits are advertised. The endpoint accepts POST requests and returns `application/json`. The x402 challenge is live and well-formed, with a 300-second payment timeout window. Settlement goes to address `0x1A2B…85F3` on Base.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The actual behavior of this specific endpoint cannot be confirmed without making a paid request.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","x402 API","USDC micropayment endpoint","lowpaymentfee","pay-per-call API","Base network API"],"warnings":["The specific function of /api/v1/ach/69 is completely undocumented — the endpoint purpose is unknown.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.","No OpenAPI spec, request schema, or response schema is available.","The 'ACH' in the path suggests possible financial/banking operations, which may fall under regulated categories — verify compliance before use."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/69","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/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base), but there is zero documentation on what this specific endpoint does, no request/response schema, and no examples. The docs pages are empty. This is effectively a stub 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'/request':12,30 '0.02':11,29,134,146 '000':138 '0x1a2b':195 '20':137 '300':186 '6':144 '85f3':196 'ACH API' 'Base network API' 'USDC micropayment endpoint' 'accept':169 'access':98 'account':161 'ach':5,23,114 'actual':239 'addit':219 'address':194 'advertis':166 'ai/ml':60 'analyt':59 'api':16,34,56,97,159,206 'application/json':174 'autom':115 'avail':233 'bank':118 'base':8,26,79,126,139,198 'base-network' 'behavior':240 'call':4,22 'cannot':245 'challeng':177 'clear':116 'collect':50 'confirm':247 'connect':214 'content':220 'crawl':236 'crypto':63 'data':58,119 'decim':145 'describ':104 'doc':204 'document':90,103,199 'endpoint':6,24,38,68,168,244 'exampl':232 'extrem':201 'financ':62 'form':183 'function':83 'goe':192 'handl':149 'header':157 'hous':117 'infer':61 'inlin':150 'json-response' 'key':17,35,160 'limit':164 'list':92 'live':179 'lowpaymentfee' 'lowpaymentfee.com':45 'make':249 'materi':237 'may':111 'network':80 'no-api-key' 'offer':48 'openapi':224 'oper':121 'page':209 'paid':251 'part':42 'particular':107 'path':87,131 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':72,147,156,188 'payment processing API' 'per':3,21,54,135 'platform':46 'post':170 'post-method' 'premium':96 'price':132,205 'prompt':216 'protocol':73 'rate':163 'readm':208 'relat':112 'render':211 'request':55,136,171,252 'request/response':227 'requir':18,36 'return':109,173 'rout':108 'schema':101,228 'second':187 'servic':66 'settl':74 'settlement':191 'simpli':95 'sole':127 'span':57 'spars':202 'spec':225 'specif':82,243 'specul':125 'timeout':189 'titl':93 'unit':140 'url':130 'usag':231 'usdc':14,32,76,142 'usdc-settlement' 'use':69 'util':65 'via':9,27,151 'wallet':215 'well':182 'well-form':181 'window':190 'without':248 'x':155 'x-payment':154 'x402':10,28,71,153,176 'x402 API' 'x402-payment'","prices":[{"id":"fa3dd338-248a-492b-a4d0-f79718daa4d7","listingId":"16218764-af38-4921-af00-5a8a8024da7f","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/69","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:21.620Z"}],"sources":[{"listingId":"16218764-af38-4921-af00-5a8a8024da7f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/69","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:21.620Z","lastSeenAt":"2026-04-27T11:03:51.739Z"}],"details":{"listingId":"16218764-af38-4921-af00-5a8a8024da7f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/69 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Pricing is $0.02 per request with no minimums or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/69"},{"claim":"Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/ach/69"}],"useCases":["Programmatic access to ACH-related data or operations (inferred from URL path)","Agent-driven pay-per-call workflows that avoid API key management","Integrating x402-compatible payment flows into automated pipelines"],"bestFor":["Developers or agents already using x402 payment protocol on Base","Use cases requiring keyless, per-request billing with no commitments","Exploring low-cost micropayment API patterns"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume batch processing where per-request pricing may add up","Anyone needing a well-documented, production-grade ACH integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.589Z"},"updatedAt":"2026-04-27T11:03:51.739Z"}}