{"id":"725f5840-9e0a-47cd-bbb2-5b936b33b7d0","shortId":"UKz9WD","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/70` 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/70` path is not documented — the provider labels it generically as \"Premium API Access\" — so its exact capability is unclear. It may relate to ACH (Automated Clearing House) payment processing or lookup 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 site-wide flat rate advertised across all their APIs. Payment is made via the x402 `exact` scheme to a specified wallet address on Base. No API keys, rate limits, or subscriptions are required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The endpoint accepts POST requests and returns `application/json`, but the expected input body and output structure are unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint","json-response"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment API","low fee API","x402 API","USDC micropayment API","pay-per-call API","Base network API"],"warnings":["The specific function of /api/v1/ach/70 is undocumented — the 'ACH' path segment suggests payment-related functionality but this is unconfirmed.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.","No request body schema or response schema is available; callers have no way to know what input is expected.","No OpenAPI or machine-readable specification is published."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/70","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/70","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 zero documentation on what /api/v1/ach/70 actually does. No OpenAPI spec, no request/response schemas, no examples. The docs pages are empty. The endpoint's purpose can only be guessed from the URL 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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':239 'access':99 'ach':5,23,110 'across':160 'address':176 'advertis':159 'ai/ml':60 'analyt':59 'api':16,34,56,98,163,180,209 'application/json':244 'attach':190 'autom':111 'avail':236 'base':8,26,79,143,178 'base-network' 'bodi':249 'call':4,22 'caller':188 'capabl':103 'challeng':135 'clear':112 'collect':50 'connect':217 'consist':151 'content':223 'crypto':63 'data':58 'decim':149 'doc':207 'document':90,202 'endpoint':6,24,38,68,127,238 'exact':102,170 'exampl':235 'expect':247 'extrem':204 'financ':62 'flat':157 'function':83 'generic':95 'given':118 'header':195 'hous':113 'infer':61 'input':248 'json-response' 'key':17,35,181 'label':93 'limit':183 'live':129 'lookup':117 'low fee API' 'lowpaymentfee.com':45 'made':166 'may':107 'network':80 'no-api-key' 'offer':48 'openapi':227 'output':251 'page':212 'part':42 'path':87,121 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':72,114,164,194,200 'payment API' 'per':3,21,54,139 'platform':46 'post':240 'post-endpoint' 'premium':97 'price':136,208 'process':115 'prompt':219 'proof':201 'protocol':73 'provid':92 'rate':158,182 'readm':211 'relat':108 'render':214 'request':55,140,241 'request/response':230 'requir':18,36,187 'return':131,243 'schema':231 'scheme':171 'servic':66 'settl':74 'simpli':189 'site':155 'site-wid':154 'span':57 'spars':205 'spec':228 'specif':82 'specifi':174 'specul':125 'structur':252 'subscript':185 'unclear':105 'unit':144 'unknown':254 'url':120 'usag':234 'usdc':14,32,76,146 'usdc-settlement' 'use':69 'util':65 'valid':133,198 'via':9,27,167 'wallet':175,218 'wide':156 'x':193 'x-payment':192 'x402':10,28,71,134,169,199 'x402 API' 'x402-payment'","prices":[{"id":"e020f0fa-e19d-487e-95eb-a188f2e0bb44","listingId":"725f5840-9e0a-47cd-bbb2-5b936b33b7d0","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/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:20.440Z"}],"sources":[{"listingId":"725f5840-9e0a-47cd-bbb2-5b936b33b7d0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/70","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:20.440Z","lastSeenAt":"2026-04-27T11:03:51.656Z"}],"details":{"listingId":"725f5840-9e0a-47cd-bbb2-5b936b33b7d0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/70 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/70"},{"claim":"Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/70"},{"claim":"Documentation pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to an ACH-related service with per-call USDC micropayments","Agent-driven API consumption without pre-registration or API key management","Integrating pay-as-you-go endpoints into automated workflows on Base"],"bestFor":["Developers experimenting with x402 pay-per-call protocols","Agents that need keyless, on-demand API access settled in USDC","Use cases requiring low-cost per-request pricing without subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume batch processing where per-call fees add up quickly","Anyone needing a well-documented, production-grade ACH integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.609Z"},"updatedAt":"2026-04-27T11:03:51.656Z"}}