{"id":"bc4d82dd-4dd7-4ffc-ba8c-fe45633ce642","shortId":"9Fp3qs","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":"lowpaymentfee.com hosts a collection of pay-per-request API endpoints settled via the x402 protocol on the Base network using USDC. The specific endpoint at `/api/v1/ach/10` is listed under \"Premium API Access\" and accepts POST requests. Payment is made per-call with no API keys, no rate limits, and no upfront commitments — each request costs $0.02 (20,000 base units of USDC with 6 decimals) paid to the on-chain address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.\n\nThe provider's landing page advertises a broad catalog of endpoints spanning data & analytics, AI & machine learning (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing model. However, the specific functionality of the `/api/v1/ach/10` path is not documented beyond the generic \"Premium API Access\" label — the \"ach\" path segment suggests ACH (Automated Clearing House) payment-related functionality, but no request/response schema or detailed documentation is available.\n\nDocumentation pages (/docs, /api, /pricing, /README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual input parameters, response format, and precise capabilities of this endpoint remain unknown. The endpoint is live and returns a valid x402 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-endpoint"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment processing API","x402 endpoint","USDC micropayment API","lowpaymentfee","automated clearing house API","Base network API"],"warnings":["No documentation available — all doc pages (/docs, /api, /pricing, /README) return only 'Connect wallet' with no content","The exact functionality of /api/v1/ach/10 is unknown; 'Premium API Access' is the only description provided","No request or response schema is published; callers cannot know what parameters to send or what to expect back","The 'ach' path segment suggests ACH payment functionality but this is unconfirmed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/10","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/10","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 returns a valid x402 challenge, but there is no documentation, no request/response schema, and the actual functionality behind '/api/v1/ach/10' is undescribed. All doc pages return only 'Connect wallet' with no content. This is effectively a stub 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'/api/v1/ach/10':63,168 '/docs':204 '/pricing':206 '/readme':207 '/request':12,30,159 '0.02':11,29,94,158 '000':96 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':111 '20':95 '402':243 '6':102 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':71 'access':69,178 'ach':5,23,181,185 'actual':221 'address':110 'advertis':119 'ai':128 'analysi':132 'analyt':127 'api':16,34,46,68,82,177 'autom':186 'automated clearing house API' 'avail':201 'base':8,26,55,97,113 'base-network' 'beyond':173 'broad':121 'call':4,22,79 'capabl':228 'catalog':122 'chain':109 'challeng':244 'classif':134 'clear':187 'collect':40 'commit':90 'connect':212 'content':218 'convers':151 'cost':93 'data':126 'decim':103 'detail':198 'document':172,199,202 'embed':135 'endpoint':6,24,47,61,124,154,231,235 'estim':145 'exchang':140 'feed':139 'financ':136 'format':225 'function':165,192 'gas':144 'generat':152 'generic':175 'geocod':149 'host':38 'hous':188 'howev':162 'infrastructur':147 'input':222 'key':17,35,83 'label':179 'land':117 'learn':130 'limit':86 'list':65 'live':237 'lowpaymentfee' 'lowpaymentfee.com':37 'machin':129 'made':76 'model':161 'network':56 'no-api-key' 'on-chain':107 'page':118,203 'paid':104 'paramet':223 'path':169,182 'pay':2,20,43 'pay-per-cal':1,19 'pay-per-request':42 'payment':74,190 'payment processing API' 'payment-rel':189 'per':3,21,44,78 'per-cal':77 'post':72 'post-endpoint' 'precis':227 'premium':67,176 'price':138,160 'prompt':214 'protocol':52 'provid':115 'quot':143 'rate':85,141 'relat':191 'remain':232 'request':45,73,92 'request/response':195 'requir':18,36 'respons':224 'return':209,239 'schema':196 'segment':183 'sentiment':131 'settl':48 'share':155 'span':125 'specif':60,164 'substant':217 'suggest':184 'summar':133 'token':142 'unit':98 'unknown':233 'upfront':89 'usdc':14,32,58,100 'usdc-settlement' 'use':57 'util':148 'valid':150,241 'via':9,27,49 'wallet':213 'web3':137 'x402':10,28,51,242 'x402 endpoint' 'x402-payment'","prices":[{"id":"a13bd957-612a-45ab-83c7-601e403f6013","listingId":"bc4d82dd-4dd7-4ffc-ba8c-fe45633ce642","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:25.520Z"}],"sources":[{"listingId":"bc4d82dd-4dd7-4ffc-ba8c-fe45633ce642","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:25.520Z","lastSeenAt":"2026-04-28T02:33:33.985Z"}],"details":{"listingId":"bc4d82dd-4dd7-4ffc-ba8c-fe45633ce642","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/10 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/10"},{"claim":"All endpoints are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The provider offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages return only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic ACH-related lookups or operations paid per-call via USDC on Base","Agent-driven financial workflows that need keyless, pay-as-you-go API access","Integrating low-cost payment-gated endpoints into automated pipelines"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents with x402-compatible wallets on Base","Use cases requiring micropayment-gated financial endpoints"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume batch processing where per-call pricing may add up","Anyone needing non-crypto payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:36.161Z"},"updatedAt":"2026-04-28T02:33:33.985Z"}}