{"id":"45bf4937-d053-4125-ae60-8daadf5ef5ed","shortId":"JmS9kb","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/107` 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 protocol on the Base network, accepting USDC payments with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/ach/107` is listed under the title \"Premium API Access\" but its exact functionality is not documented in the available crawl material. The provider's site groups endpoints into categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure, but this particular path (`/ach/107`) does not appear in any of the listed categories. The x402 challenge confirms the endpoint is live, accepts POST requests, charges up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call, and settles on the Base network to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.\n\nBecause the endpoint's actual purpose and request/response schema are undocumented, agents should treat this as an opaque paid endpoint. The provider advertises uniform $0.02 pricing across all their APIs, instant access without authentication beyond payment, and no rate limits.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","low payment fee","x402 USDC endpoint","pay-per-call API","Base network API","micropayment API"],"warnings":["The endpoint path /api/v1/ach/107 does not appear in any documented API category on the provider's site — its actual functionality is unknown","No request or response schema is available; the outputSchema only specifies HTTP POST","Documentation pages (/docs, /pricing, /README) returned no meaningful content beyond 'Connect wallet'","The generic title 'Premium API Access' provides no indication of what this endpoint actually does"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/107","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/107","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The x402 challenge confirms the endpoint is live and pricing is clear ($0.02 USDC on Base). However, the specific endpoint /api/v1/ach/107 has no documentation — its purpose, request schema, and response schema are entirely unknown. The crawled docs/pricing/README pages returned only 'Connect wallet' with no useful 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'/api/v1/ach/107':32,86 '/request':12,26 '0.02':11,25,160,201 '000':154 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':176 '20':153 '6':164 'ACH API' 'Base network API' 'accept':69,147 'access':94,208 'ach':5,19 'across':203 'actual':181 'address':175 'advertis':199 'agent':188 'ai':118 'ai/ml':52 'analyt':51,117 'api':48,74,93,206 'appear':132 'authent':210 'avail':104 'base':8,22,67,155,172 'beyond':211 'call':4,18,167 'categori':114,138 'challeng':141 'charg':150 'collect':42 'commit':81 'confirm':142 'crawl':105 'crypto':55 'data':50,116 'decim':165 'document':101 'endpoint':6,20,30,60,85,112,144,179,196 'exact':97 'financ':54,121 'function':98 'given':161 'group':111 'i.e':159 'includ':115 'infer':53 'infrastructur':124 'instant':207 'key':75 'learn':120 'limit':78,216 'list':88,137 'live':146 'low payment fee' 'lowpaymentfee.com':37 'machin':119 'materi':106 'micropayment API' 'network':68,173 'no-api-key' 'offer':40 'opaqu':194 'paid':195 'part':34 'particular':127 'path':128 'pay':2,16,45 'pay-per-cal':1,15 'pay-per-call API' 'pay-per-request':44 'payment':71,212 'per':3,17,46,166 'platform':38 'post':148 'post-endpoint' 'premium':92 'price':202 'protocol':64 'provid':108,198 'purpos':182 'rate':77,215 'request':47,149 'request/response':184 'requir':82 'schema':185 'servic':58 'settl':169 'site':110 'span':49 'specif':84 'titl':91 'treat':190 'undocu':187 'uniform':200 'unit':156 'usdc':14,28,70,158,162 'usdc-base-network' 'use':61 'util':57 'via':9,23 'web3':122 'without':209 'x402':10,24,63,140 'x402 USDC endpoint' 'x402-payment'","prices":[{"id":"2831880b-1f99-44d0-9fc9-1c3f34891650","listingId":"45bf4937-d053-4125-ae60-8daadf5ef5ed","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/107","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:51.843Z"}],"sources":[{"listingId":"45bf4937-d053-4125-ae60-8daadf5ef5ed","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/107","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:51.843Z","lastSeenAt":"2026-04-27T15:05:15.524Z"}],"details":{"listingId":"45bf4937-d053-4125-ae60-8daadf5ef5ed","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/107 \\\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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/107"},{"claim":"The provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/107"}],"useCases":["Accessing a premium ACH-related data or processing endpoint via micropayment","Integrating pay-per-use API calls into agent workflows without pre-registration","Testing x402 protocol payment flows on Base network"],"bestFor":["Agents that need keyless, pay-per-call API access","Developers experimenting with x402 micropayment protocols","Use cases requiring no-commitment, no-rate-limit API consumption"],"notFor":["Users who need detailed API documentation and schemas before integration","High-volume batch processing where per-call pricing adds up quickly","Anyone needing guaranteed SLAs or support contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.948Z"},"updatedAt":"2026-04-27T15:05:15.524Z"}}