{"id":"451fb1e4-0b6e-4875-b0ee-25348ec05284","shortId":"vXAByC","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/132` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The platform advertises categories spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all at a flat $0.02 per request. The specific `/api/v1/ach/132` path is listed as \"Premium API Access\" but its exact functionality is not documented in the available crawl material. Based on the URL pattern (\"ach\" typically refers to Automated Clearing House bank transfers), this endpoint may relate to ACH payment or banking data, but this is speculative.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. It requires payment of up to 20,000 base units of USDC (token contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base), which equals $0.02 given USDC's 6 decimal places. Payment is made via the `exact` scheme with a 300-second timeout. No API keys or accounts are needed — access is granted purely through the x402 payment header.\n\nDocumentation is extremely sparse. The docs, API, pricing, 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 returns. Prospective users should be aware that the actual behavior of `/api/v1/ach/132` is undocumented beyond its title.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ach-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment API","bank transfer API","lowpaymentfee","x402 API","USDC pay-per-call","Base network API"],"warnings":["The exact functionality of /api/v1/ach/132 is completely undocumented — 'Premium API Access' is the only description available.","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no substantive content.","No OpenAPI schema, request format, or response format is available.","The 'ach' path segment suggests ACH banking operations but this is unconfirmed and may be a generic route name."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/132","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/132","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the specific function of /api/v1/ach/132 is entirely undocumented. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':12,30 '0.02':11,29,88,172 '000':160 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':167 '20':159 '300':188 '6':176 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':150 'access':100,198 'account':195 'ach':5,23,118,132 'ach-endpoint' 'actual':253 'advertis':71 'ai':76 'analyt':75 'api':16,34,57,99,192,213 'autom':122 'avail':110 'awar':250 'bank':125,135 'bank transfer API' 'base':8,26,65,113,161,169 'base-network' 'behavior':254 'beyond':259 'broad':50 'call':4,22 'catalog':51 'categori':72 'challeng':143 'clear':123 'confirm':144 'connect':222 'content':228 'contract':166 'crawl':111 'data':74,136 'decim':177 'descript':239 'doc':212 'document':107,207 'endpoint':6,24,38,128,146,244 'equal':171 'exact':103,184 'exampl':236 'extrem':209 'financ':79 'flat':87 'function':104 'given':173 'grant':200 'header':206 'hous':124 'infrastructur':82 'key':17,35,193 'learn':78 'list':96 'live':148 'lowpaymentfee' 'lowpaymentfee.com':45 'machin':77 'made':181 'materi':112 'may':129 'need':197 'network':66 'no-api-key' 'offer':48 'openapi':232 'page':217 'part':42 'path':94 'pattern':117 'pay':2,20,54 'pay-per-cal':1,19 'pay-per-request':53 'payment':133,155,179,205 'payment API' 'per':3,21,55,89 'place':178 'platform':46,70 'post':151 'premium':98 'price':214 'prompt':224 'prospect':246 'protocol':62 'pure':201 'readm':216 'refer':120 'relat':130 'render':219 'request':56,90,152 'request/response':235 'requir':18,36,154 'return':245 'schema':233 'scheme':185 'second':189 'settl':58 'span':73 'spars':210 'specif':92,243 'specul':140 'substant':227 'timeout':190 'titl':261 'token':165 'transfer':126 'typic':119 'undocu':258 'unit':162 'url':116 'usdc':14,32,68,164,174 'usdc-settlement' 'use':67 'user':247 'util':83 'via':9,27,59,182 'wallet':223 'web3':80 'x402':10,28,61,142,204 'x402 API' 'x402-payment'","prices":[{"id":"25721b1d-3546-4bff-afcd-cc9f06d1b4b8","listingId":"451fb1e4-0b6e-4875-b0ee-25348ec05284","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/132","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:54.850Z"}],"sources":[{"listingId":"451fb1e4-0b6e-4875-b0ee-25348ec05284","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/132","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:54.850Z","lastSeenAt":"2026-04-27T15:05:15.685Z"}],"details":{"listingId":"451fb1e4-0b6e-4875-b0ee-25348ec05284","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/132 \\\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/132"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/132"},{"claim":"The platform offers APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to ACH-related data or operations via micropayment","Agent-driven financial workflows requiring per-call payment without credentials","Integrating pay-as-you-go banking or payment endpoints into automated pipelines"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments on Base in USDC","Prototyping workflows that need instant API access without rate limits"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume production use cases where $0.02/request adds up significantly","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.781Z"},"updatedAt":"2026-04-27T15:05:15.685Z"}}