{"id":"ad9c761b-6be6-468a-8227-17df21330337","shortId":"jHcCsb","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/151` 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/151` endpoint is not documented — the path suggests ACH (Automated Clearing House) banking or payment-related functionality, but no schema, parameter documentation, or example responses are available to confirm this.\n\nThe endpoint is live and returns a valid x402 challenge. It accepts POST requests and charges a maximum of 20,000 base units of USDC (0.02 USD) per call. Payment is made to `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on the Base network. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.\n\nDocumentation is extremely sparse. The landing page lists available API categories and uniform $0.02 pricing, but the `/docs`, `/api`, `/pricing`, 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 description of what this specific ACH endpoint accepts or returns. Prospective users should be aware that the actual functionality behind this endpoint is unverified.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ach-endpoint"],"categories":["finance","payments"],"synonyms":["ACH API","payment processing API","bank transfer API","x402 endpoint","USDC micropayment API","lowpaymentfee","automated clearing house"],"warnings":["No documentation exists for this specific endpoint — its actual functionality is unknown","All doc/pricing/README pages render only 'Connect wallet' with no content","No OpenAPI spec or request/response schema available","The 'ACH' path segment suggests financial/banking functionality but this is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/151","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/151","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/151 actually does — no input schema, no output schema, no examples, and no description beyond the generic title 'Premium API Access'. The docs pages are empty. This is effectively a stub 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'/api/v1/ach/151':40,86 '/docs':194 '/pricing':196 '/readme':198 '/request':12,30 '0.02':11,29,142,190 '000':137 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':150 '20':136 'ACH API' 'USDC micropayment API' 'accept':128,228 'access':166 'ach':5,23,94,226 'ach-endpoint' 'actual':238 'advertis':157 'ai/ml':60 'analyt':59 'api':16,34,56,159,186 'attach':169 'autom':95 'automated clearing house' 'avail':113,185 'awar':235 'bank':98 'bank transfer API' 'base':8,26,79,138,153 'base-network' 'behind':240 'call':4,22,145 'categori':187 'challeng':126 'charg':132 'clear':96 'collect':50 'confirm':115 'connect':204 'content':210 'crypto':63 'data':58 'descript':221 'document':90,108,177 'endpoint':6,24,38,68,87,118,227,242 'exampl':110 'extrem':179 'financ':62 'function':83,103,239 'header':173 'hous':97 'infer':61 'instant':165 'key':17,35,160 'land':182 'limit':163 'list':184 'live':120 'lowpaymentfee' 'lowpaymentfee.com':45 'made':148 'maximum':134 'network':80,154 'no-api-key' 'offer':48 'openapi':214 'page':183,199 'paramet':107 'part':42 'path':92 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-request':52 'payment':72,101,146,172 'payment processing API' 'payment-rel':100 'per':3,21,54,144 'platform':46,156 'post':129 'price':191 'prompt':206 'prospect':231 'protocol':73 'rate':162 'relat':102 'render':201 'request':55,130,176 'request/response':217 'requir':18,36 'respons':111 'return':122,230 'schema':106,218 'servic':66 'settl':74 'simpli':168 'span':57 'spars':180 'spec':215 'specif':82,225 'suggest':93 'uniform':189 'unit':139 'unverifi':244 'usd':143 'usdc':14,32,76,141 'usdc-settlement' 'use':69 'user':232 'util':65 'valid':124 'via':9,27 'wallet':205 'x402':10,28,71,125,171 'x402 endpoint' 'x402-payment'","prices":[{"id":"0e836562-9d77-42bc-806d-0476a19283a1","listingId":"ad9c761b-6be6-468a-8227-17df21330337","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/151","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:00.339Z"}],"sources":[{"listingId":"ad9c761b-6be6-468a-8227-17df21330337","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/151","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:00.339Z","lastSeenAt":"2026-04-24T22:32:11.054Z"}],"details":{"listingId":"ad9c761b-6be6-468a-8227-17df21330337","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/151 \\\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/151"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/151"}],"useCases":["Programmatic ACH-related lookups or operations paid per call in USDC","Agent-driven financial workflows that need keyless, pay-as-you-go API access","Integrating low-cost payment or banking data into automated pipelines"],"bestFor":["Developers wanting keyless, pay-per-use API access settled on Base","AI agents that can attach x402 payment headers autonomously","Low-volume or experimental use cases where $0.02/call is acceptable"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume production workloads requiring bulk pricing or rate-limit guarantees","Anyone needing non-crypto payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.588Z"},"updatedAt":"2026-04-24T22:32:11.054Z"}}