{"id":"632eaebf-9238-4963-9bda-f8618938e0ec","shortId":"PcBFT2","kind":"x402","title":"Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.","tagline":"Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.","description":"This endpoint at `/api/v1/ach/36` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-call 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/36` path is not documented — the provider labels it generically as \"Premium API Access\" — so the exact data or service it returns is unclear. It may relate to ACH (Automated Clearing House) banking data or routing information 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 POST 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 the generic \"Premium API Access\" label and `application/json` MIME type.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","ach-data"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","bank routing API","low fee API","x402 API","USDC pay-per-call","Base network API"],"warnings":["The exact function of /api/v1/ach/36 is undocumented — 'Premium API Access' is a generic label applied across the platform","All documentation pages (docs, API, pricing, README) return only 'Connect wallet' with no usable content","No OpenAPI schema, no request body specification, and no response examples are available","The 'ach' path segment suggests banking/ACH data but this is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/36","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/36","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 with clear pricing, but there is virtually no documentation: no OpenAPI schema, no request/response examples, no description of what the endpoint actually does. The specific purpose of /api/v1/ach/36 is unknown. This is effectively a stub 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'/call':12,30 '0.02':11,29,143,155 '000':147 '20':146 '6':153 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':243 'access':99,193,251 'ach':5,23,114 'ach-data' 'across':163 'addit':225 'address':179 'advertis':184 'ai/ml':60 'analyt':59 'api':16,34,56,98,166,186,211,250 'application/json':254 'attach':196 'autom':115 'bank':118 'bank routing API' 'base':8,26,79,148,181 'base-network' 'beyond':246 'call':55 'challeng':140 'clear':116 'collect':50 'connect':220 'consist':156 'content':226 'crypto':63 'data':58,103,119 'decim':154 'descript':237 'doc':210 'document':90,205 'endpoint':6,24,38,68,132,242 'exact':102,173 'exampl':234 'extrem':207 'financ':62 'function':83 'generic':95,248 'given':123 'header':200 'hous':117 'infer':61 'inform':122 'instant':192 'json-response' 'key':17,35,187 'label':93,252 'limit':190 'list':165 'live':134 'low fee API' 'lowpaymentfee.com':45 'made':169 'may':111 'mime':255 'network':80 'no-api-key' 'offer':48 'openapi':230 'page':215 'part':42 'path':87,126 'pay':2,20,53 'pay-per-cal':52 'pay-per-request':1,19 'payment':72,167,199 'payment processing API' 'per':3,21,54,144 'platform':46,159,183 'post':203 'premium':97,249 'price':141,162,212 'prompt':222 'protocol':73 'provid':92 'rate':189 'readm':214 'relat':112 'render':217 'request':4,22,145,204 'request/response':233 'requir':18,36 'return':107,136,245 'rout':121 'schema':231 'scheme':174 'servic':66,105 'settl':74 'simpli':195 'span':57 'spars':208 'specif':82,241 'specifi':177 'specul':130 'type':256 'unclear':109 'uniform':161 'unit':149 'url':125 'usdc':14,32,76,151 'usdc-settlement' 'use':69 'util':65 'valid':138 'via':9,27,170 'wallet':178,221 'x402':10,28,71,139,172,198 'x402 API' 'x402-payment'","prices":[{"id":"5a2135da-6180-4158-95dd-d7ae42edfee6","listingId":"632eaebf-9238-4963-9bda-f8618938e0ec","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/36","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:32.872Z"}],"sources":[{"listingId":"632eaebf-9238-4963-9bda-f8618938e0ec","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/36","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:32.872Z","lastSeenAt":"2026-04-27T22:32:47.132Z"}],"details":{"listingId":"632eaebf-9238-4963-9bda-f8618938e0ec","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/36 \\\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/36"},{"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/36"},{"claim":"Documentation pages render only a 'Connect wallet' prompt with no additional content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying ACH-related banking or payment data on a per-request basis","Agent-driven workflows that need pay-as-you-go API access without key management","Integrating low-cost financial data lookups into automated pipelines"],"bestFor":["Developers wanting zero-setup, keyless API access via crypto micropayments","AI agents that can settle x402 payments autonomously on Base","Low-volume or sporadic usage where per-call pricing beats subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume production workloads where $0.02/request adds up significantly","Anyone unable or unwilling to pay in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:35.815Z"},"updatedAt":"2026-04-27T22:32:47.132Z"}}