{"id":"98e0380f-2b22-439d-9550-2478298a4040","shortId":"2xxAPH","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/26` 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/26` path is not documented — the listing title is simply \"Premium API Access\" and the endpoint lives under an `/ach/` path prefix that doesn't appear in the site's public API catalog. It may relate to ACH (Automated Clearing House) payment processing or financial data, but this is speculative.\n\nPricing is $0.02 per request (maxAmountRequired of 20,000 base units of USDC with 6 decimals = $0.02). Payment is made via the x402 exact scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The platform advertises no API keys, no rate limits, and instant access. The endpoint accepts HTTP POST and returns `application/json`.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint does or what parameters it accepts. Users should proceed with caution and expect to experiment to discover the endpoint's actual functionality.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","http-post","json-response"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","lowpaymentfee","x402 API","USDC micropayment API","Base network API","pay-per-call API"],"warnings":["The specific function of /api/v1/ach/26 is undocumented and not listed in the site's public API catalog","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no content","No request parameters or response schema are available — callers must experiment blind","The /ach/ path prefix suggests possible financial/payment processing, which may involve regulated activity"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/26","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/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.200","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of /api/v1/ach/26 is unknown. The crawled docs/pricing/API pages are all empty beyond a wallet-connect prompt. This is effectively a stub 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'/api/v1/ach/26':40,86 '/request':12,30 '0.02':11,29,138,152 '000':144 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':163 '20':143 '6':150 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':180,229 'access':98,177 'ach':5,23,123 'actual':244 'address':162 'advertis':168 'ai/ml':60 'analyt':59 'api':16,34,56,97,117,170,193 'appear':111 'application/json':185 'autom':124 'base':8,26,79,145,165 'base-network' 'call':4,22 'catalog':118 'caution':234 'clear':125 'collect':50 'connect':201 'content':207 'crypto':63 'data':58,131 'decim':151 'descript':218 'discov':240 'doc':191 'document':90,186 'doesn':109 'endpoint':6,24,38,68,101,179,223,242 'exact':159 'exampl':215 'expect':236 'experi':238 'extrem':188 'financ':62 'financi':130 'function':83,245 'hous':126 'http':181 'http-post' 'infer':61 'instant':176 'json-response' 'key':17,35,171 'limit':174 'list':92 'live':102 'lowpaymentfee' 'lowpaymentfee.com':45 'made':155 'maxamountrequir':141 'may':120 'network':80 'offer':48 'openapi':211 'page':196 'paramet':227 'part':42 'path':87,106 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':72,127,153 'payment processing API' 'per':3,21,54,139 'platform':46,167 'post':182 'prefix':107 'premium':96 'price':136,192 'proceed':232 'process':128 'prompt':203 'protocol':73 'public':116 'rate':173 'readm':195 'relat':121 'render':198 'request':55,140 'request/response':214 'requir':18,36 'return':184 'schema':212 'scheme':160 'servic':66 'settl':74 'simpli':95 'site':114 'span':57 'spars':189 'specif':82,222 'specul':135 'substant':206 'titl':93 'unit':146 'usdc':14,32,76,148 'usdc-settlement' 'use':69 'user':230 'util':65 'via':9,27,156 'wallet':202 'x402':10,28,71,158 'x402 API' 'x402-payment'","prices":[{"id":"db8097d8-1a57-4c3b-919b-d2b569a3dbf0","listingId":"98e0380f-2b22-439d-9550-2478298a4040","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/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:30.468Z"}],"sources":[{"listingId":"98e0380f-2b22-439d-9550-2478298a4040","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/26","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:30.468Z","lastSeenAt":"2026-04-27T22:32:47.010Z"}],"details":{"listingId":"98e0380f-2b22-439d-9550-2478298a4040","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/26 \\\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":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"maxAmountRequired is 20000 base units of USDC (USD Coin) on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/26"},{"claim":"The endpoint accepts HTTP POST and returns application/json","source_url":"https://lowpaymentfee.com/api/v1/ach/26"},{"claim":"Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/ach/26"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/26"}],"useCases":["Programmatic access to an ACH-related endpoint with per-call USDC micropayments","Agent-driven API consumption without API key management","Exploring x402 payment protocol integrations on Base"],"bestFor":["Developers experimenting with x402 pay-per-call protocols","Agents that need keyless, on-demand API access settled in USDC","Users comfortable with undocumented endpoints who can reverse-engineer request formats"],"notFor":["Production workloads requiring well-documented, stable API contracts","Users who need detailed request/response schemas before integration","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:35.935Z"},"updatedAt":"2026-04-27T22:32:47.010Z"}}