{"id":"7a14af7e-1571-43e7-bf64-6feeb8fb70f9","shortId":"h5k7dj","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific path `/api/v1/ach/196` is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request in USDC.\n\nThe endpoint accepts HTTP POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed USDC payment on Base (asset contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. There are no API keys, no rate limits, and no subscription commitments — each call is independently settled on-chain.\n\nHowever, the specific functionality behind `/api/v1/ach/196` is not documented. The path suggests it may relate to ACH (Automated Clearing House) banking data or operations, but this is speculative. The platform's landing page lists many endpoints but does not include this particular one, and the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. Without documentation or an example response schema, the actual capability of this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-on-base","pay-per-request","http-post","json-response","no-api-key"],"categories":["finance","infrastructure"],"synonyms":["ACH API","payment API","low fee API","x402 endpoint","USDC micropayment API","Base network API","pay-per-call API"],"warnings":["The specific functionality of /api/v1/ach/196 is undocumented — the 'ach' path segment suggests ACH banking operations but this is unconfirmed.","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.","This endpoint is not listed among the advertised APIs on the landing page.","No request or response schema is available; callers cannot know what to send or expect back.","If 'ACH' refers to Automated Clearing House banking operations, this may fall under financial services regulation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/ach/196","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/196","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the specific functionality of /api/v1/ach/196 is unknown. The docs, pricing, and API pages are all empty beyond a wallet-connect 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'0.02':10,28,88,142 '000':133 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':126 '20':132 '6':138 'ACH API' 'Base network API' 'USDC micropayment API' 'accept':95 'access':6,24,44 'ach':179 'actual':232 'ai':77 'amount':129 'analyt':76 'api':5,16,23,34,43,72,146,211 'asset':124 'attach':111 'autom':180 'bank':183 'base':8,26,52,123,134 'behind':167 'broader':62 'call':71,156 'caller':110 'capabl':233 'chain':162 'clear':181 'commit':154 'connect':217 'contain':117 'content':223 'contract':125 'data':75,184 'decim':139 'doc':208 'document':171,225 'dozen':66 'endpoint':38,73,94,198,236 'equal':141 'exampl':228 'financ':80 'function':166 'gate':3,21 'handl':104 'header':116 'hous':182 'howev':163 'http':96 'http-post' 'includ':202 'independ':158 'infrastructur':83 'inlin':105 'json':101 'json-response' 'key':17,35,147 'land':194 'learn':79 'limit':150 'list':196 'low fee API' 'lowpaymentfee.com':40 'machin':78 'mani':197 'maximum':128 'may':176 'network':53 'no-api-key' 'offer':65 'on-chain':160 'one':205 'oper':186 'page':195,212 'part':59 'particular':204 'path':56,173 'pay':9,27,69 'pay-per-cal':68 'pay-per-call API' 'pay-per-request' 'payment':48,102,115,121 'payment API' 'per':11,29,70,89 'platform':63,192 'post':97 'premium':4,22,42 'price':86,209 'prompt':219 'protocol':49,109 'provid':41 'rate':149 'relat':177 'remain':237 'render':214 'request':12,30,90,98 'requir':18,36,130 'respons':229 'return':100 'schema':230 'settl':159 'sign':119 'span':74 'specif':55,165 'specul':190 'subscript':153 'suggest':174 'unclear':238 'unit':135 'usdc':14,32,92,120,137 'usdc-on-base' 'util':84 'via':45,106 'wallet':218 'web3':81 'without':224 'x':114 'x-payment':113 'x402':2,20,47,108 'x402 endpoint' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"83ef3a06-5a53-4be0-9ad0-b205bd2a19e5","listingId":"7a14af7e-1571-43e7-bf64-6feeb8fb70f9","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/196","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:42:11.792Z"}],"sources":[{"listingId":"7a14af7e-1571-43e7-bf64-6feeb8fb70f9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ach/196","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:42:11.792Z","lastSeenAt":"2026-04-27T12:13:02.292Z"}],"details":{"listingId":"7a14af7e-1571-43e7-bf64-6feeb8fb70f9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ach/196 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/ach/196"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/ach/196"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to ACH-related data or operations via a single micropayment per call","Agent-driven workflows that need keyless, on-demand API access settled in USDC on Base","Integrating pay-as-you-go API calls into Web3 applications without subscription overhead"],"bestFor":["Developers wanting frictionless, keyless API access with crypto micropayments","AI agents that can autonomously pay for API calls via x402","Users who prefer per-request billing over monthly subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or rate-limited plans","Anyone who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:31.054Z"},"updatedAt":"2026-04-27T12:13:02.292Z"}}