{"id":"09968b4b-3d29-4f7a-bff1-fb434af26e9c","shortId":"v7xjhz","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/62` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific function of the `/api/v1/ach/62` path is not documented — the provider labels it generically as \"Premium API Access\" — so its exact purpose is unclear. It may relate to ACH (Automated Clearing House) payment data or processing given the URL path, but this is speculative.\n\nThe endpoint is live and returns a valid x402 challenge. Pricing is $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). Payment is made in USDC on Base to the specified payTo address. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each POST request.\n\nThe broader lowpaymentfee.com platform lists endpoints across data/analytics, AI/ML (sentiment, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation), all at the same $0.02/request price point. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what this specific ACH endpoint accepts or returns.","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","x402 API","USDC micropayment","Base network API","lowpaymentfee","pay-per-call API","automated clearing house"],"warnings":["The exact functionality of /api/v1/ach/62 is unknown — 'Premium API Access' is a generic label applied across the platform.","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content.","No OpenAPI schema or request/response examples are available.","The 'ACH' in the path suggests financial/payment functionality but this is unconfirmed — exercise caution with any regulated financial data."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/62","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/62","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/62 actually does, what inputs it accepts, or what it returns. No OpenAPI schema, no examples, no docs pages with content. The listing is effectively a 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'/request':12,30,211 '0.02':11,29,126,141,210 '000':132 '20':131 '6':139 'ACH API' 'Base network API' 'USDC micropayment' 'accept':254 'access':87,165 'ach':5,23,98,252 'ach-endpoint' 'across':183 'address':153 'advertis':156 'ai/ml':185 'api':16,34,57,86,158,221 'attach':168 'autom':99 'automated clearing house' 'base':8,26,65,133,148 'base-network' 'broad':50 'broader':178 'call':4,22 'catalog':51 'challeng':123 'classif':188 'clear':100 'connect':230 'content':236 'convers':204 'data':103 'data/analytics':184 'decim':140 'descript':247 'doc':220 'document':78,215 'embed':189 'endpoint':6,24,38,115,182,253 'estim':198 'exact':90 'exampl':244 'exchang':193 'extrem':217 'feed':192 'finance/web3':190 'function':71 'gas':197 'generat':205 'generic':83 'geocod':202 'given':106 'header':172 'hous':101 'howev':214 'infrastructur':200 'instant':164 'key':17,35,159 'label':81 'limit':162 'list':181 'live':117 'lowpaymentfee' 'lowpaymentfee.com':45,179 'made':144 'maxamountrequir':129 'may':95 'network':66 'no-api-key' 'offer':48 'openapi':240 'page':225 'part':42 'path':75,109 'pay':2,20,54 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request':53 'payment':102,142,171 'payment processing API' 'payto':152 'per':3,21,55,127 'platform':46,155,180 'point':213 'post':175 'premium':85 'price':124,191,212,222 'process':105 'prompt':232 'protocol':62 'provid':80 'purpos':91 'quot':196 'rate':161,194 'readm':224 'relat':96 'render':227 'request':56,128,176 'request/response':243 'requir':18,36 'return':119,256 'schema':241 'sentiment':186 'settl':58 'simpli':167 'spars':218 'specif':70,251 'specifi':151 'specul':113 'summar':187 'token':195 'unclear':93 'unit':134 'url':108 'usdc':14,32,68,136,146 'usdc-settlement' 'use':67 'util':201 'valid':121,203 'via':9,27,59 'wallet':231 'x402':10,28,61,122,170 'x402 API' 'x402-payment'","prices":[{"id":"f827a3be-3d09-43f6-bccb-522cb5f22f52","listingId":"09968b4b-3d29-4f7a-bff1-fb434af26e9c","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/62","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:13.134Z"}],"sources":[{"listingId":"09968b4b-3d29-4f7a-bff1-fb434af26e9c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/62","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:13.134Z","lastSeenAt":"2026-04-27T12:34:23.952Z"}],"details":{"listingId":"09968b4b-3d29-4f7a-bff1-fb434af26e9c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/62 \\\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/62"},{"claim":"Platform pricing is $0.02 per request 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/62"},{"claim":"Docs, API, pricing, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing ACH-related data or functionality on a per-request payment basis","Integrating pay-per-call financial endpoints into agent workflows without API key management","Programmatic access to premium API services settled in USDC on Base"],"bestFor":["Agents or developers who want keyless, pay-per-request API access","Use cases requiring USDC-settled micropayments on Base L2","Quick integration without subscription commitments"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume use cases where per-request pricing may add up compared to subscription plans","Anyone needing clarity on exactly what this endpoint returns before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:30.955Z"},"updatedAt":"2026-04-27T12:34:23.952Z"}}