{"id":"547d71ef-7e11-47e6-ac83-44b704609290","shortId":"dRjuGA","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/86` 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/86` path is not documented — the provider labels it generically as \"Premium API Access\" — so its exact purpose is unclear. It may relate to ACH (Automated Clearing House) banking data or operations given the URL path, but this is speculative.\n\nThe endpoint is live and returns a valid x402 challenge. Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), consistent with the platform's uniform pricing across all listed APIs. Payment is made via the x402 `exact` scheme to a specified wallet address on Base. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint accepts or returns beyond `application/json`. Agents should treat this as a low-documentation endpoint where the actual behavior must be discovered experimentally.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","ach-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","lowpaymentfee","x402 API","USDC micropayment API","Base network API","pay-per-call API"],"warnings":["The exact function of /api/v1/ach/86 is undocumented — 'Premium API Access' is a generic label applied across the platform","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content","No OpenAPI schema, no request/response examples, and no input parameter documentation available","The 'ach' in the URL path suggests ACH banking operations, which may involve regulated financial activity — verify compliance requirements"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/86","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/86","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 virtually no documentation: no OpenAPI schema, no request/response examples, no description of what the endpoint actually does. The docs pages are empty (\"Connect wallet\" only). The specific purpose of /api/v1/ach/86 is 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'/request':12,30 '0.02':11,29,138,150 '000':142 '20':141 '6':148 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':237 'access':99,188 'ach':5,23,110 'ach-endpoint' 'across':158 'actual':254 'addit':219 'address':174 'advertis':179 'agent':242 'ai/ml':60 'analyt':59 'api':16,34,56,98,161,181,205 'application/json':241 'attach':191 'autom':111 'bank':114 'base':8,26,79,143,176 'base-network' 'behavior':255 'beyond':240 'call':4,22 'challeng':135 'clear':112 'collect':50 'connect':214 'consist':151 'content':220 'crypto':63 'data':58,115 'decim':149 'descript':231 'discov':258 'doc':204 'document':90,199,250 'endpoint':6,24,38,68,127,236,251 'exact':102,168 'exampl':228 'experiment':259 'extrem':201 'financ':62 'function':83 'generic':95 'given':118 'header':195 'hous':113 'infer':61 'instant':187 'json-response' 'key':17,35,182 'label':93 'limit':185 'list':160 'live':129 'low':249 'low-document':248 'lowpaymentfee' 'lowpaymentfee.com':45 'made':164 'may':107 'must':256 'network':80 'no-api-key' 'offer':48 'openapi':224 'oper':117 'page':209 'part':42 'path':87,121 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':72,162,194 'payment processing API' 'per':3,21,54,139 'platform':46,154,178 'premium':97 'price':136,157,206 'prompt':216 'protocol':73 'provid':92 'purpos':103 'rate':184 'readm':208 'relat':108 'render':211 'request':55,140,198 'request/response':227 'requir':18,36 'return':131,239 'schema':225 'scheme':169 'servic':66 'settl':74 'simpli':190 'span':57 'spars':202 'specif':82,235 'specifi':172 'specul':125 'treat':244 'unclear':105 'uniform':156 'unit':144 'url':120 'usdc':14,32,76,146 'usdc-settlement' 'use':69 'util':65 'valid':133 'via':9,27,165 'wallet':173,215 'x402':10,28,71,134,167,193 'x402 API' 'x402-payment'","prices":[{"id":"3afb2eb0-4236-4f49-a3c1-1ce8681acda9","listingId":"547d71ef-7e11-47e6-ac83-44b704609290","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/86","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:22.864Z"}],"sources":[{"listingId":"547d71ef-7e11-47e6-ac83-44b704609290","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/86","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:22.864Z","lastSeenAt":"2026-04-27T11:03:51.763Z"}],"details":{"listingId":"547d71ef-7e11-47e6-ac83-44b704609290","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/86 \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/86"},{"claim":"Platform-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/86"},{"claim":"Documentation pages render only 'Connect wallet' with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing ACH-related data or operations via a single pay-per-call request","Integrating low-cost API calls into agent workflows without managing API keys","Experimenting with x402 payment protocol on Base network"],"bestFor":["Developers exploring x402 payment-gated APIs","Agents needing keyless, pay-per-request access to utility endpoints","Low-volume or sporadic API usage where subscriptions are overkill"],"notFor":["Production workloads requiring well-documented, schema-validated APIs","High-volume use cases where per-request pricing adds up quickly","Users who need detailed documentation or SLA guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.475Z"},"updatedAt":"2026-04-27T11:03:51.763Z"}}