{"id":"ea05ef6a-c77f-4de5-a55a-f294621899b9","shortId":"T3t9tx","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/76` 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 listed price is $0.02 per request (20,000 base units of USDC with 6 decimals), and the platform advertises no API keys, no rate limits, and instant access.\n\nThe specific function of the `/api/v1/ach/76` endpoint 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 parameters, or response format are provided in the crawled documentation. The endpoint is confirmed live — it returns a valid x402 402 challenge when called via POST, accepting USDC payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.\n\nThe broader lowpaymentfee.com site lists many endpoints across categories (analytics, AI, finance, infrastructure) all at the same $0.02 price point, but documentation pages (`/docs`, `/pricing`, `/README`) returned only a \"Connect wallet\" prompt with no substantive content. Without request/response schemas or usage examples, agents will need to experiment to determine the actual input format and output structure of this specific endpoint.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ach-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","lowpaymentfee","x402 ACH","USDC pay-per-call","Base network API","automated clearing house"],"warnings":["No documentation available — /docs, /pricing, and /README pages all return only 'Connect wallet' with no content","The specific purpose of /api/v1/ach/76 is undocumented; 'Premium API Access' is a generic label","No request or response schema is provided; input format must be discovered experimentally","The site lists many endpoints at identical pricing with no differentiation in documentation, raising questions about actual functionality"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/76","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/76","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, but there is no documentation of what the endpoint actually does, no request/response schema, and the docs pages are empty. The 'Premium API Access' label and '/ach/76' path are the only clues to functionality. This is effectively a stub 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'/docs':203 '/pricing':204 '/readme':205 '/request':12,30 '0.02':11,29,85,197 '000':89 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':177 '20':88 '402':166 '6':95 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':172 'access':109,126 'ach':5,23,134 'ach-endpoint' 'across':187 'actual':230 'address':176 'advertis':100 'agent':222 'ai':190 'ai/ml':60 'analyt':59,189 'api':16,34,56,102,125 'autom':135 'automated clearing house' 'base':8,26,79,90,179 'base-network' 'beyond':120 'broader':181 'call':4,22,169 'categori':188 'challeng':167 'clear':136 'collect':50 'confirm':159 'connect':209 'content':215 'crawl':154 'crypto':63 'data':58,141 'decim':96 'determin':228 'document':119,155,201 'endpoint':6,24,38,68,116,157,186,239 'exampl':221 'experi':226 'financ':62,191 'format':149,232 'function':112 'generic':122 'hous':137 'infer':61 'infrastructur':192 'input':231 'instant':108 'key':17,35,103 'label':123 'limit':106 'list':82,184 'live':160 'lowpaymentfee' 'lowpaymentfee.com':45,182 'mani':185 'may':131 'need':224 'network':80 'no-api-key' 'offer':48 'output':234 'page':202 'paramet':146 'part':42 'path':128 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-request':52 'payment':72,138,174 'payment processing API' 'per':3,21,54,86 'platform':46,99 'point':199 'post':171 'premium':124 'price':83,198 'process':139 'prompt':211 'protocol':73 'provid':151 'rate':105 'relat':132 'request':55,87,145 'request/response':217 'requir':18,36 'respons':148 'return':162,206 'schema':144,218 'servic':66 'settl':74 'site':183 'span':57 'specif':111,238 'structur':235 'substant':214 'suggest':129 'unit':91 'usag':220 'usdc':14,32,76,93,173 'usdc-settlement' 'use':69 'util':65 'valid':164 'via':9,27,170 'wallet':210 'without':216 'x402':10,28,71,165 'x402 ACH' 'x402-payment'","prices":[{"id":"d5635ccd-d2d1-452a-9217-5d5086b36c2e","listingId":"ea05ef6a-c77f-4de5-a55a-f294621899b9","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/76","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:20.450Z"}],"sources":[{"listingId":"ea05ef6a-c77f-4de5-a55a-f294621899b9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/76","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:20.450Z","lastSeenAt":"2026-04-27T11:03:51.673Z"}],"details":{"listingId":"ea05ef6a-c77f-4de5-a55a-f294621899b9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/76 \\\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 valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/76"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/76"},{"claim":"Documentation pages (/docs, /pricing, /README) contain only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to ACH-related data or processing via micropayment","Agent-driven financial workflows requiring per-call payment without subscription","Integrating ACH functionality into crypto-native applications"],"bestFor":["Developers wanting zero-signup, pay-as-you-go API access","Crypto-native agents that can settle USDC on Base","Prototyping workflows that need ACH data without committing to a provider"],"notFor":["Production systems requiring documented request/response schemas and SLAs","Users who need fiat-only payment methods (no crypto wallet)","High-volume use cases where per-call pricing may not be economical"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.594Z"},"updatedAt":"2026-04-27T11:03:51.673Z"}}