{"id":"edf4f8e7-a2bc-43cc-97b6-c02b4ccda31d","shortId":"U8b5zy","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/162` 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/162` path is not documented — the provider labels it generically as \"Premium API Access\" — so its exact capabilities are unclear. It may relate to ACH (Automated Clearing House) payment processing or data, but this is speculative based solely on the URL path.\n\nPricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), consistent with the platform's uniform pricing across all listed endpoints. The x402 challenge confirms the endpoint is live, accepts POST requests, and settles payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.\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 accepts or returns. The platform lists many other endpoints on its landing page, but `/api/v1/ach/162` is not among them, making it difficult to determine its intended use case.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ach-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","lowpaymentfee","x402 API","USDC micropayment API","Base network API","pay-per-call API"],"warnings":["The exact purpose and functionality of /api/v1/ach/162 is undocumented and unknown","No OpenAPI schema, request format, or response format is available","The endpoint does not appear in the provider's own listed API catalog","Docs, pricing, API, and README pages all render only 'Connect wallet' with no content","Cannot verify what data or service this endpoint actually provides"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/162","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/162","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific function of /api/v1/ach/162 is unknown. The endpoint is not listed on the provider's own landing page. This is effectively a stub 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'/request':12,30 '0.02':11,29,130,142 '000':134 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':170 '20':133 '6':140 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':162,231 'access':99 'ach':5,23,110 'ach-endpoint' 'across':150 'address':169 'ai/ml':60 'among':248 'analyt':59 'api':16,34,56,98,174,199 'attach':185 'autom':111 'base':8,26,79,122,135,172 'base-network' 'call':4,22 'caller':183 'capabl':103 'case':258 'challeng':156 'clear':112 'collect':50 'commit':180 'confirm':157 'connect':208 'consist':143 'content':214 'crypto':63 'data':58,117 'decim':141 'descript':225 'determin':254 'difficult':252 'doc':198 'document':90,193 'endpoint':6,24,38,68,153,159,230,239 'exact':102 'exampl':222 'extrem':195 'financ':62 'function':83 'generic':95 'header':189 'hous':113 'infer':61 'intend':256 'key':17,35,175 'label':93 'land':242 'limit':177 'list':152,236 'live':161 'lowpaymentfee' 'lowpaymentfee.com':45 'make':250 'mani':237 'may':107 'network':80 'no-api-key' 'offer':48 'openapi':218 'page':203,243 'part':42 'path':87,127 'pay':2,20,53 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':52 'payment':72,114,167,188 'payment processing API' 'per':3,21,54,131 'platform':46,146,235 'post':163 'premium':97 'price':128,149,200 'process':115 'prompt':210 'protocol':73 'provid':92 'rate':176 'readm':202 'relat':108 'render':205 'request':55,132,164,192 'request/response':221 'requir':18,36,182 'return':233 'schema':219 'servic':66 'settl':74,166 'simpli':184 'sole':123 'span':57 'spars':196 'specif':82,229 'specul':121 'substant':213 'unclear':105 'uniform':148 'unit':136 'upfront':179 'url':126 'usdc':14,32,76,138 'usdc-settlement' 'use':69,257 'util':65 'via':9,27 'wallet':209 'x402':10,28,71,155,187 'x402 API' 'x402-payment'","prices":[{"id":"9d034569-ba93-4ec0-8b6b-dfd1c670e7f5","listingId":"edf4f8e7-a2bc-43cc-97b6-c02b4ccda31d","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/162","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:03.321Z"}],"sources":[{"listingId":"edf4f8e7-a2bc-43cc-97b6-c02b4ccda31d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/162","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:03.321Z","lastSeenAt":"2026-04-27T14:04:43.099Z"}],"details":{"listingId":"edf4f8e7-a2bc-43cc-97b6-c02b4ccda31d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/162 \\\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":"Endpoint returns 402 with x402 challenge, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/ach/162"},{"claim":"Price is $0.02 per request across all endpoints, paid in USDC on Base","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access advertised","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/ach/162"},{"claim":"maxAmountRequired is 20000 base units (6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/ach/162"}],"useCases":["Accessing ACH-related data or functionality on a per-request basis","Integrating pay-per-call financial endpoints into agent workflows","Testing x402 payment protocol integrations with low-cost endpoints"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing low-cost per-call API access without API key management","Use cases requiring USDC-settled micropayments on Base"],"notFor":["Users who need documented request/response schemas before integrating","High-volume production workloads where endpoint behavior is unverified","Anyone needing ACH transaction initiation (no evidence this endpoint supports that)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.394Z"},"updatedAt":"2026-04-27T14:04:43.099Z"}}