{"id":"d4c38ef0-b705-418e-85c2-0d76e080f962","shortId":"VPWzYw","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/126` 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 pricing model is simple: $0.02 per request with no API keys, no rate limits, and no minimum commitments.\n\nThe specific endpoint `/api/v1/ach/126` is listed under the title \"Premium API Access\" but its exact functionality is unclear from the available documentation. The path segment `ach/126` suggests it may relate to ACH (Automated Clearing House) banking or payment data, but this is not confirmed by the crawled material. The site's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no additional documentation or schema details.\n\nThe 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. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout. No request body schema or response schema is documented.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment API","low fee API","x402 endpoint","USDC pay-per-call","Base network API","micropayment API"],"warnings":["No request or response schema available — endpoint behavior is undocumented","The specific function of /api/v1/ach/126 is unclear; 'Premium API Access' is a generic label","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content","If this endpoint relates to ACH banking data, it may fall under financial regulation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/126","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/126","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and the x402 challenge is well-formed with clear pricing ($0.02 USDC on Base). However, there is no documentation for this specific endpoint's purpose, no request/response schema, and the docs/pricing/API pages are all empty beyond a wallet connect prompt. The endpoint's actual function (ACH data? payment processing?) is 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'/request':12,30 '0.02':11,29,86,198 '000':188 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':208 '0x8335':193 '20':187 '300':211 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':178 'access':111 'ach':5,23,131 'ach/126':125 'addit':165 'address':207 'ai/ml':60 'analyt':59 'api':16,34,56,91,110,154 'autom':132 'avail':120 'bank':135 'base':8,26,79,189,195 'base-network' 'bodi':216 'call':4,22 'challeng':172 'clear':133 'collect':50 'commit':99 'confirm':143,173 'connect':160 'crawl':146 'crypto':63 'data':58,138 'detail':169 'doc':151 'document':121,166,222 'endpoint':6,24,38,68,102,175 'equal':197 'exact':114,204 'financ':62 'function':115 'hous':134 'infer':61 'key':17,35,92 'limit':95 'list':105 'live':177 'low fee API' 'lowpaymentfee.com':45 'made':201 'materi':147 'may':128 'micropayment API' 'minimum':98 'model':83 'network':80 'no-api-key' 'offer':48 'page':155 'part':42 'path':123 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-request':52 'payment':72,137,183,199 'payment API' 'per':3,21,54,87 'platform':46 'post':179 'post-endpoint' 'premium':109 'price':82,152 'prompt':162 'protocol':73 'rate':94 'relat':129 'render':157 'request':55,88,180,215 'requir':18,36,182 'respons':219 'schema':168,217,220 'scheme':205 'second':212 'segment':124 'servic':66 'settl':74 'simpl':85 'site':149 'span':57 'specif':101 'suggest':126 'timeout':213 'titl':108 'unclear':117 'unit':190 'usdc':14,32,76,192 'usdc-settlement' 'use':69 'util':65 'via':9,27,202 'wallet':161 'x402':10,28,71,171 'x402 endpoint' 'x402-payment'","prices":[{"id":"383416b9-0b16-478a-8017-70dd09419d40","listingId":"d4c38ef0-b705-418e-85c2-0d76e080f962","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/126","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:53.678Z"}],"sources":[{"listingId":"d4c38ef0-b705-418e-85c2-0d76e080f962","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/126","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:53.678Z","lastSeenAt":"2026-04-27T15:05:15.652Z"}],"details":{"listingId":"d4c38ef0-b705-418e-85c2-0d76e080f962","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/126 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring up to 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/126"},{"claim":"Platform 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/126"}],"useCases":["Accessing ACH or payment-related data on a per-call basis without subscription","Integrating pay-per-request APIs into agent workflows using x402 protocol","Testing x402 payment flows with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing on-demand API access without API key management","Low-volume or sporadic API consumers who prefer pay-per-call pricing"],"notFor":["Users needing detailed API documentation or request/response schemas before integration","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.848Z"},"updatedAt":"2026-04-27T15:05:15.652Z"}}