{"id":"3e6937dc-57e8-460d-8c3f-7f5972c56631","shortId":"yZtBya","kind":"x402","title":"x402-gated email data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated email data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides premium API access to an email-related resource (specifically `/api/v1/emails/96`) via the x402 payment protocol. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all priced at $0.02 per request.\n\nPayment is settled on the Base network using USDC (contract `0x8335…2913`). The x402 challenge advertises a `maxAmountRequired` of 20,000 base units, which at 6 decimals equals $0.02. No API keys or rate limits are required; callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The endpoint accepts HTTP POST and returns `application/json`.\n\nThe specific functionality of `/api/v1/emails/96` is not documented beyond the generic label \"Premium API Access.\" The crawled site pages (docs, pricing, README) all render only a \"Connect wallet\" prompt with no further documentation. Because the endpoint path includes a numeric ID (`96`), it likely retrieves or processes data related to a specific email record, but this is speculative. The platform advertises no API keys, no rate limits, and instant access.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","email-data","json-response","no-api-key"],"categories":["data","email"],"synonyms":["lowpaymentfee","email API","x402 email endpoint","pay-per-call API","USDC API","Base network API","micropayment API"],"warnings":["No documentation available — all doc pages render only 'Connect wallet'","The specific functionality of /api/v1/emails/96 is undocumented; the endpoint name and numeric ID suggest email data retrieval but this is unconfirmed","No request body schema or response schema provided","The endpoint is not listed among the advertised APIs on the homepage, raising questions about whether it is a production resource"],"endpointUrl":"https://lowpaymentfee.com/api/v1/emails/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/emails/96","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is essentially no documentation for this specific endpoint. The docs, pricing, and README pages all render only a wallet-connect prompt. The purpose of /api/v1/emails/96 is unknown beyond the generic 'Premium API Access' label, and no request/response schemas are 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'0.02':10,24,80,111 '000':103 '0x8335':93 '20':102 '2913':94 '6':108 '96':183 'Base network API' 'USDC API' 'accept':136 'access':36,156,211 'advertis':98,202 'ai/ml':69 'analyt':68 'api':35,64,113,155,204 'application/json':141 'attach':122 'base':8,22,88,104 'base-network' 'beyond':150 'broader':55 'call':63 'caller':120 'challeng':97 'connect':168 'contract':92 'crawl':158 'data':5,19,67,73,189 'decim':109 'doc':161 'document':149,174 'dozen':58 'email':4,18,40,194 'email API' 'email-data' 'email-rel':39 'endpoint':6,20,30,65,135,177 'equal':110 'financ':71 'function':144 'gate':3,17 'generic':152 'header':127 'http':137 'id':182 'includ':179 'infer':70 'infrastructur':75 'instant':210 'json-response' 'key':114,205 'label':153 'like':185 'limit':117,208 'lowpaymentfee' 'lowpaymentfee.com':32 'maxamountrequir':100 'micropayment API' 'network':89 'no-api-key' 'numer':181 'offer':57 'page':160 'part':52 'path':178 'pay':9,23,61 'pay-per-cal':60 'pay-per-call API' 'pay-per-request' 'payment':48,83,126,132 'per':11,25,62,81 'platform':56,201 'post':138 'premium':34,154 'price':78,162 'process':188 'prompt':170 'proof':133 'protocol':49 'provid':33 'rate':116,207 'readm':163 'record':195 'relat':41,190 'render':165 'request':12,26,82 'requir':119 'resourc':42 'retriev':186 'return':140 'settl':85 'simpli':121 'site':159 'span':66 'specif':43,143,193 'specul':199 'unit':105 'usdc':14,28,91 'usdc-settlement' 'use':90 'util':76 'valid':130 'via':45 'wallet':169 'web3':72 'x':125 'x-payment':124 'x402':2,16,47,96,131 'x402 email endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"40d9991e-df5e-4622-b871-ec78634db826","listingId":"3e6937dc-57e8-460d-8c3f-7f5972c56631","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/emails/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":"2026-04-21T18:32:13.252Z"}],"sources":[{"listingId":"3e6937dc-57e8-460d-8c3f-7f5972c56631","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/emails/96","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:13.252Z","lastSeenAt":"2026-04-22T02:31:51.605Z"}],"details":{"listingId":"3e6937dc-57e8-460d-8c3f-7f5972c56631","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/emails/96 \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/emails/96"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/emails/96"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving email-related data on a per-request payment basis","Integrating pay-per-call email lookups into agent workflows","Accessing premium email data without subscription or API key management"],"bestFor":["Agents needing one-off email data lookups without signup","Developers wanting frictionless pay-per-request access on Base","Workflows requiring no-commitment, no-rate-limit API calls"],"notFor":["Bulk email processing at high volume (no documented batch support)","Users who need detailed API documentation before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:19.638Z"},"updatedAt":"2026-04-22T02:31:51.605Z"}}