{"id":"2b610e52-3c45-4ab8-929a-4082d1082c0b","shortId":"J4ZcdB","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/124` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities. All endpoints are gated via the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/api/v1/ach/124` is labeled \"Premium API Access\" but its exact functionality is not documented beyond that title — the path segment `ach/124` suggests it may relate to ACH (Automated Clearing House) payment processing or lookup, though this is not confirmed by the available documentation.\n\nThe x402 challenge is live and returns a `maxAmountRequired` of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is made via the \"exact\" scheme to a specified wallet address on Base. The platform advertises no API keys, no rate limits, and instant access. No OpenAPI schema, detailed request/response documentation, or usage examples were found in the crawl — the docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content.\n\nBecause the endpoint's actual functionality (what it returns, what input it expects) is undocumented, agents should treat this as a low-information listing. The platform hosts many endpoints at similar price points, but without request/response schemas or sample payloads, integration requires experimentation or direct contact with the provider.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","ach-endpoint","no-api-key","http-post"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","x402 endpoint","USDC micropayment","Base network API","lowpaymentfee","automated clearing house"],"warnings":["Endpoint functionality is undocumented — 'Premium API Access' and the /ach/124 path provide no clear indication of what data or service is returned.","No OpenAPI spec, request schema, or response schema available.","All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no usable content.","The path suggests ACH (Automated Clearing House) functionality but this is unconfirmed inference."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/124","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/124","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation of what this endpoint actually does, no request/response schema, and no examples. The docs pages are empty beyond a wallet-connect prompt. The endpoint title 'Premium API Access' is generic and 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'/request':12,26 '0.02':11,25,142 '000':133 '20':132 '6':138 'ACH API' 'Base network API' 'USDC micropayment' 'access':85,170 'ach':5,19,105 'ach-endpoint' 'ach/124':99 'actual':206 'address':156 'advertis':161 'agent':217 'ai/ml':53 'analyt':52 'api':49,84,163,189 'autom':106 'automated clearing house' 'avail':120 'base':8,22,74,134,158 'beyond':93 'broad':42 'call':4,18 'catalog':43 'challeng':124 'clear':107 'confirm':117 'connect':195 'contact':248 'content':201 'crawl':184 'data':51 'decim':139 'detail':174 'direct':247 'doc':186 'document':92,121,176 'endpoint':6,20,30,61,204,231 'equal':141 'exact':88,150 'exampl':179 'expect':214 'experiment':245 'financ':55 'found':181 'function':89,207 'gate':63 'host':229 'hous':108 'http-post' 'infer':54 'inform':225 'infrastructur':58 'input':212 'instant':169 'integr':243 'key':164 'label':82 'limit':167 'list':226 'live':126 'lookup':112 'low':224 'low-inform':223 'lowpaymentfee' 'lowpaymentfee.com':37 'made':147 'mani':230 'maxamountrequir':130 'may':102 'network':75 'no-api-key' 'offer':40 'openapi':172 'page':190 'part':34 'path':97 'pay':2,16,46 'pay-per-cal':1,15 'pay-per-request':45 'payload':242 'payment':67,109,145 'payment processing API' 'per':3,17,47,143 'platform':38,160,228 'point':235 'premium':83 'price':187,234 'process':110 'prompt':197 'protocol':68 'provid':251 'rate':166 'relat':103 'request':48,144 'request/response':175,238 'requir':244 'resourc':78 'return':128,192,210 'sampl':241 'schema':173,239 'scheme':151 'segment':98 'settl':69 'similar':233 'span':50 'specif':77 'specifi':154 'suggest':100 'though':113 'titl':95 'treat':219 'undocu':216 'unit':135 'usag':178 'usdc':14,28,71,137 'usdc-base' 'util':59 'via':9,23,64,148 'wallet':155,196 'web3':56 'without':237 'x402':10,24,66,123 'x402 endpoint' 'x402-payment'","prices":[{"id":"0cd5fe4e-40a9-44e8-8a8c-fdd8bbce8598","listingId":"2b610e52-3c45-4ab8-929a-4082d1082c0b","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/124","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:53.650Z"}],"sources":[{"listingId":"2b610e52-3c45-4ab8-929a-4082d1082c0b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/124","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:53.650Z","lastSeenAt":"2026-04-27T15:05:15.605Z"}],"details":{"listingId":"2b610e52-3c45-4ab8-929a-4082d1082c0b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/124 \\\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 x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/124"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/124"},{"claim":"Docs, pricing, API, and README pages all show only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic ACH-related data retrieval or payment initiation (inferred from path)","Agent-driven pay-per-call API access without API key management","Micropayment-gated financial service integration"],"bestFor":["Agents needing keyless, pay-per-call API access on Base","Developers exploring x402-gated financial endpoints","Automated workflows that settle per-request in USDC"],"notFor":["Users who need detailed API documentation before integrating","High-volume use cases where per-request pricing may add up","Anyone requiring guaranteed SLA or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.878Z"},"updatedAt":"2026-04-27T15:05:15.605Z"}}