{"id":"24f565f9-1143-46d8-9b28-cbb1f25c5d60","shortId":"KUCE2J","kind":"x402","title":"Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC","tagline":"Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC","description":"This endpoint at `/api/v1/ach/180` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs settled via x402 on the Base network using USDC. The platform advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities, all at a flat $0.02 per request with no API keys, no rate limits, and instant access.\n\nThe specific `/api/v1/ach/180` endpoint is listed under the title \"Premium API Access\" but its exact functionality is not documented in the available crawl material. The path suggests it may relate to ACH (Automated Clearing House) payment processing or lookup, but this is speculative — the provider's landing page does not list this particular route among its advertised APIs. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires payment of up to 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 given USDC's 6 decimals.\n\nDocumentation is extremely thin: the /docs, /pricing, /api, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples available. Prospective users should be aware that without documentation it is unclear what request body this endpoint expects or what response it returns.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","ach-endpoint","no-api-key"],"categories":["finance","payments"],"synonyms":["ACH API","payment processing API","x402 API","USDC pay-per-call","lowpaymentfee","Base network API","automated clearing house"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return only a wallet-connect prompt","The /api/v1/ach/180 route is not listed among the provider's advertised APIs on the landing page","No request or response schema is available; the endpoint's exact functionality is unknown","The endpoint name suggests ACH/payment functionality which may be subject to financial regulations"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/180","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/180","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and the specific purpose of /api/v1/ach/180 is undocumented. This is effectively a stub 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'/api/v1/ach/180':32,92 '/docs':187 '/pricing':188 '/readme':191 '/request':12,26 '0.02':11,25,77,176 '000':166 '0x8335':171 '20':165 '6':180 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':156 'access':89,101 'ach':5,19,121 'ach-endpoint' 'advertis':60,146 'ai':65 'among':144 'analyt':64 'api':48,82,100,147 'autom':122 'automated clearing house' 'avail':111,216 'awar':221 'base':8,22,54,167,173 'base-network' 'bodi':230 'call':4,18 'categori':61 'challeng':150 'clear':123 'collect':42 'confirm':151 'connect':197 'content':203 'crawl':112 'data':63 'decim':181 'document':108,182,224 'endpoint':6,20,30,93,153,232 'equal':175 'exact':104 'exampl':215 'expect':233 'extrem':184 'financ':68 'flat':76 'function':105 'given':177 'hous':124 'includ':62 'infrastructur':71 'instant':88 'key':83 'land':136 'learn':67 'limit':86 'list':95,140 'live':155 'lookup':128 'lowpaymentfee' 'lowpaymentfee.com':37 'machin':66 'materi':113 'may':118 'network':55 'no-api-key' 'offer':40 'openapi':207 'page':137,192 'part':34 'particular':142 'path':115 'pay':2,16,45 'pay-per-cal':1,15 'pay-per-request':44 'payment':125,161 'payment processing API' 'per':3,17,46,78 'platform':38,59 'post':157 'premium':99 'process':126 'prompt':199 'prospect':217 'provid':134 'rate':85 'relat':119 'request':47,79,158,229 'request/response':210 'requir':160 'respons':236 'return':194,238 'rout':143 'schema':211 'settl':49 'spec':208 'specif':91 'specul':132 'substant':202 'suggest':116 'thin':185 'titl':98 'unclear':227 'unit':168 'usag':214 'usdc':14,28,57,170,178 'usdc-settlement' 'use':56 'user':218 'util':72 'via':9,23,50 'wallet':198 'web3':69 'without':223 'x402':10,24,51,149 'x402 API' 'x402-payment'","prices":[{"id":"40be638f-f08a-4a45-aeff-e92eea325f40","listingId":"24f565f9-1143-46d8-9b28-cbb1f25c5d60","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/180","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:02.114Z"}],"sources":[{"listingId":"24f565f9-1143-46d8-9b28-cbb1f25c5d60","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/180","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:02.114Z","lastSeenAt":"2026-04-24T22:32:11.182Z"}],"details":{"listingId":"24f565f9-1143-46d8-9b28-cbb1f25c5d60","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/180 \\\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":"The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/180"},{"claim":"The platform advertises APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic ACH-related data retrieval or processing via a single paid API call","Agent-driven payment workflows that settle per-request in USDC on Base","Integrating low-cost financial utility endpoints without managing API keys"],"bestFor":["Developers wanting keyless, pay-per-call financial APIs","AI agents with x402-compatible wallets on Base","Prototyping payment-adjacent workflows without subscription commitments"],"notFor":["Production use requiring documented request/response schemas","High-volume batch ACH processing with SLA guarantees","Users who need fiat-only payment rails (this requires USDC on Base)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.415Z"},"updatedAt":"2026-04-24T22:32:11.182Z"}}