{"id":"8bfd2d66-c9c3-46c4-b30c-2b9384b1d02b","shortId":"NWwaQ2","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/127` 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 endpoint is listed under \"Premium API Access\" but its exact functionality is unclear — the path suggests ACH (Automated Clearing House) payment-related data or operations, though no detailed documentation or schema is available to confirm what it returns or accepts.\n\nThe platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and no minimum commitments. The x402 challenge confirms the endpoint is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0.02 USDC = $0.02) on the Base network to address `0x1A2B...85F3`. The asset address `0x8335...2913` corresponds to USDC on Base.\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 spec, no request/response schema, and no examples. The endpoint's category within the platform's own listing structure is not shown (the homepage lists Data & Analytics, AI & ML, Finance & Web3, and Infrastructure groups, but `/api/v1/ach/127` does not appear among them). Users should expect to experiment with POST requests to discover the accepted input format and response shape.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","ach-endpoint"],"categories":["finance","payments"],"synonyms":["ACH API","payment processing API","x402 API","USDC pay-per-call","lowpaymentfee","Base network API","automated clearing house"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","The endpoint /api/v1/ach/127 is not listed among the provider's advertised API catalog on the homepage","No request or response schema is provided; input format and output shape are unknown","The meaning of '127' in the path is unexplained — it may be a resource ID or route parameter"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/127","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/127","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this specific endpoint does, no request/response schema, no examples, and the endpoint path does not appear in the provider's own homepage catalog. Effectively a stub 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'/request':12,30 '0.02':11,29,117,157,159 '000':152 '0x1a2b':166 '0x8335':171 '20':151 '2913':172 '85f3':167 'ACH API' 'Base network API' 'USDC pay-per-call' 'accept':111,142,255 'access':77 'ach':5,23,87 'ach-endpoint' 'across':120 'address':165,170 'advertis':114 'ai':230 'among':242 'analyt':229 'api':16,34,57,76,125,184 'appear':241 'asset':169 'autom':88 'automated clearing house' 'avail':104 'base':8,26,65,153,162,177 'base-network' 'broad':50 'call':4,22 'catalog':51 'categori':214 'challeng':136 'clear':89 'commit':133 'confirm':106,137 'connect':193 'content':199 'correspond':173 'data':94,228 'detail':99 'discov':253 'doc':183 'document':100,178 'endpoint':6,24,38,71,122,139,212 'exact':80 'exampl':210 'expect':246 'experi':248 'extrem':180 'financ':232 'flat':116 'format':257 'function':81 'group':236 'homepag':226 'hous':90 'infrastructur':235 'input':256 'key':17,35,126 'limit':129 'list':73,220,227 'live':141 'lowpaymentfee' 'lowpaymentfee.com':45 'minimum':132 'ml':231 'network':66,163 'no-api-key' 'offer':48 'openapi':203 'oper':96 'page':188 'part':42 'path':85 'pay':2,20,54 'pay-per-cal':1,19 'pay-per-request':53 'payment':92,147 'payment processing API' 'payment-rel':91 'per':3,21,55,118 'platform':46,113,217 'post':143,250 'premium':75 'price':185 'prompt':195 'protocol':62 'rate':128 'readm':187 'relat':93 'render':190 'request':56,119,144,251 'request/response':206 'requir':18,36,146 'respons':259 'return':109 'schema':102,207 'settl':58 'shape':260 'shown':224 'spars':181 'spec':204 'specif':70 'structur':221 'substant':198 'suggest':86 'though':97 'unclear':83 'unit':154 'usdc':14,32,68,156,158,175 'usdc-settlement' 'use':67 'user':244 'via':9,27,59 'wallet':194 'web3':233 'within':215 'x402':10,28,61,135 'x402 API' 'x402-payment'","prices":[{"id":"d6ff17cb-2fce-4131-9303-af249b9f20a9","listingId":"8bfd2d66-c9c3-46c4-b30c-2b9384b1d02b","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/127","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:56.057Z"}],"sources":[{"listingId":"8bfd2d66-c9c3-46c4-b30c-2b9384b1d02b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/127","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:56.057Z","lastSeenAt":"2026-04-24T22:32:10.920Z"}],"details":{"listingId":"8bfd2d66-c9c3-46c4-b30c-2b9384b1d02b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/127 \\\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 platform charges $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/ach/127"},{"claim":"The endpoint is live and returns HTTP 402 with x402Version 1 challenge on POST","source_url":"https://lowpaymentfee.com/api/v1/ach/127"}],"useCases":["Querying ACH-related payment data or initiating ACH operations via a single paid API call","Integrating low-cost per-request financial endpoints into agent workflows without managing API keys","Testing x402 payment protocol integrations on Base with a cheap live endpoint"],"bestFor":["Developers experimenting with x402 protocol payments on Base","Agents needing keyless, pay-per-call access to financial/ACH endpoints","Low-volume or sporadic API consumers who want no subscription commitments"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume production workloads where $0.02/request adds up significantly","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.765Z"},"updatedAt":"2026-04-24T22:32:10.920Z"}}