{"id":"6198a868-5a55-46a3-8c9e-7e03928d120f","shortId":"BsHPt8","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated premium API endpoint on Base, pay-per-request with USDC.","description":"This endpoint at `/api/v1/ehr/96` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. The specific endpoint is labeled \"Premium API Access\" and accepts POST requests gated by the x402 payment protocol, settling on the Base network in USDC.\n\nThe x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request, consistent with the site's advertised flat $0.02/request pricing). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The platform advertises instant access with no minimums or commitments.\n\nHowever, the specific functionality behind `/api/v1/ehr/96` is unclear. The path segment \"ehr\" (commonly associated with Electronic Health Records) does not appear in the site's listed API categories, and no documentation, request/response schemas, or examples are available for this endpoint. The docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without knowing what data or service this endpoint returns, callers should treat it as an opaque premium endpoint until further documentation is published.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","post-endpoint","no-api-key"],"categories":["api","data"],"synonyms":["lowpaymentfee","x402 api","pay per request api","USDC gated endpoint","Base network API","micropayment API","EHR API","premium data endpoint"],"warnings":["The specific functionality of /api/v1/ehr/96 is undocumented — 'ehr' may refer to Electronic Health Records, which could involve regulated health data","No request body schema or response schema is available","All documentation pages (docs, pricing, README) returned only 'Connect wallet' with no substantive content","The endpoint path does not match any of the publicly listed API categories on the site"],"endpointUrl":"https://lowpaymentfee.com/api/v1/ehr/96","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/ehr/96","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 captured) and pricing is clear ($0.02/request in USDC on Base), but there is no documentation, no request/response schema, and the specific purpose of /api/v1/ehr/96 is unknown. The docs pages returned no content. This is effectively a stub 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'/request':111 '0.02':99,110 '000':94 '20':93 'Base network API' 'EHR API' 'USDC gated endpoint' 'accept':69 'access':67,139 'advertis':108,137 'ai/ml':53 'analyt':52 'api':5,19,49,66,114,171 'appear':165 'associ':158 'attach':123 'avail':181 'base':8,22,81,95 'base-network' 'behind':149 'caller':121,211 'categori':172 'challeng':87 'collect':40 'commit':144 'common':157 'connect':195 'consist':103 'content':201 'cost':91 'crypto':56 'data':51,205 'doc':186 'document':175,222 'ehr':156 'electron':160 'endpoint':6,20,30,62,184,209,219 'exampl':179 'financ':55 'flat':109 'function':148 'gate':3,17,72 'header':128 'health':161 'howev':145 'indic':88 'infer':54 'instant':138 'key':115 'know':203 'label':64 'limit':118 'list':170 'lowpaymentfee' 'lowpaymentfee.com':37 'maximum':90 'micropayment API' 'minimum':142 'network':82 'no-api-key' 'opaqu':217 'page':190 'part':34 'path':154 'pay':10,24,46 'pay per request api' 'pay-per-request':9,23,45 'payment':76,127,133 'per':11,25,47,101 'platform':38,136 'post':70 'post-endpoint' 'premium':4,18,65,218 'premium data endpoint' 'price':112,187 'prompt':197 'proof':134 'protocol':44,77 'publish':224 'rate':117 'readm':189 'record':162 'request':12,26,48,71,102 'request/response':176 'requir':120 'return':192,210 'schema':177 'segment':155 'servic':59,207 'settl':78 'simpli':122 'site':106,168 'span':50 'specif':61,147 'substant':200 'treat':213 'unclear':152 'unit':96 'usd':100 'usdc':14,28,84,98 'usdc-settlement' 'util':58 'valid':131 'wallet':196 'without':202 'x':126 'x-payment':125 'x402':2,16,43,75,86,132 'x402 api' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"c9a654c7-e545-411e-b870-545dd0023ed8","listingId":"6198a868-5a55-46a3-8c9e-7e03928d120f","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/ehr/96","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:10.241Z"}],"sources":[{"listingId":"6198a868-5a55-46a3-8c9e-7e03928d120f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/ehr/96","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:10.241Z","lastSeenAt":"2026-04-22T01:02:02.333Z"}],"details":{"listingId":"6198a868-5a55-46a3-8c9e-7e03928d120f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/ehr/96 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/ehr/96"},{"claim":"The site advertises $0.02 per request flat pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/ehr/96"}],"useCases":["Programmatic access to a premium data endpoint without API key management","Agent-driven pay-per-call workflows using x402 on Base","Integrating low-cost per-request APIs into automated pipelines"],"bestFor":["Developers wanting key-free, pay-as-you-go API access","AI agents with x402 payment capability on Base","Users who need low-cost single-request transactions"],"notFor":["Users who need detailed documentation or known response schemas before integrating","Anyone requiring non-USDC or non-Base payment rails","Use cases requiring guaranteed SLAs or support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:22.484Z"},"updatedAt":"2026-04-22T01:02:02.333Z"}}