{"id":"7060e38f-e39d-4d4d-8efb-c132236ef1b1","shortId":"E9kuHj","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 x402-protocol access to an email-related resource at `/api/v1/emails/84`. It is part of a broader platform offering dozens of pay-per-call API endpoints across data & analytics, AI/ML, finance/Web3, and infrastructure categories — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific resource `/api/v1/emails/84` is described only as \"Premium API Access\" with no further documentation on what data it returns or what input it expects. The x402 challenge confirms the endpoint is live, accepts POST requests, charges up to 20,000 base units of USDC (i.e., $0.02 given 6 decimals), and pays out to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The response MIME type is `application/json`.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the emails endpoint actually provides. The platform advertises no API keys, no rate limits, and instant access, but the lack of documentation makes it difficult to evaluate the actual utility of this specific endpoint.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","email-data"],"categories":["data"],"synonyms":["email API","premium email access","x402 email endpoint","lowpaymentfee email","pay-per-call email","USDC email API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","The purpose and schema of /api/v1/emails/84 are completely undocumented; 'Premium API Access' is the only description.","No OpenAPI spec or request/response examples are provided anywhere.","Cannot verify what data this endpoint actually returns without making a paid request."],"endpointUrl":"https://lowpaymentfee.com/api/v1/emails/84","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/84","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.200","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is essentially no documentation: no OpenAPI schema, no request/response examples, no description of what the emails/84 resource actually returns. Docs pages are empty. This is effectively a stub 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'0.02':10,24,73,130 '000':124 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':139 '20':123 '6':132 'USDC email API' 'accept':117 'access':37,94,197 'across':62 'actual':184,209 'address':138 'advertis':188 'ai/ml':65 'analyt':64 'api':60,93,153,190 'application/json':145 'base':8,22,82,125 'base-network' 'broader':51 'call':59 'categori':69 'challeng':111 'charg':120 'confirm':112 'connect':161 'content':167 'data':5,19,63,101 'decim':133 'describ':89 'descript':178 'difficult':205 'doc':151 'document':98,146,202 'dozen':54 'email':4,18,41,182 'email API' 'email-data' 'email-rel':40 'endpoint':6,20,30,61,114,183,214 'evalu':207 'exampl':175 'expect':108 'extrem':148 'finance/web3':66 'gate':3,17 'given':131 'i.e':129 'infrastructur':68 'input':106 'instant':196 'json-response' 'key':191 'lack':200 'limit':194 'live':116 'lowpaymentfee email' 'lowpaymentfee.com':32 'make':203 'mime':142 'network':83 'offer':53 'openapi':171 'page':156 'part':48 'pay':9,23,57,135 'pay-per-cal':56 'pay-per-call email' 'pay-per-request' 'per':11,25,58,74 'platform':52,187 'post':118 'premium':92 'premium email access' 'price':71,152 'prompt':163 'protocol':36 'provid':33,185 'rate':193 'readm':155 'relat':42 'render':158 'request':12,26,75,119 'request/response':174 'resourc':43,86 'respons':141 'return':103 'schema':172 'settl':77 'spars':149 'specif':85,213 'substant':166 'type':143 'unit':126 'usdc':14,28,79,128 'usdc-settlement' 'util':210 'wallet':162 'x402':2,16,35,110 'x402 email endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':34","prices":[{"id":"c068092c-e50d-4676-9246-fb9d4ca1c9df","listingId":"7060e38f-e39d-4d4d-8efb-c132236ef1b1","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/84","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:13.168Z"}],"sources":[{"listingId":"7060e38f-e39d-4d4d-8efb-c132236ef1b1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/emails/84","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:13.168Z","lastSeenAt":"2026-04-25T11:33:15.424Z"}],"details":{"listingId":"7060e38f-e39d-4d4d-8efb-c132236ef1b1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/emails/84 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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/emails/84"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/emails/84"}],"useCases":["Retrieving email-related data via a single paid API call","Agent-driven data retrieval with automatic USDC micropayment on Base","Accessing premium email content without API key registration"],"bestFor":["Agents that can settle x402 payments in USDC on Base","Users who want keyless, pay-per-call API access","Low-volume or one-off email data lookups"],"notFor":["Users who need detailed API documentation before integrating","High-volume email processing requiring bulk pricing or rate guarantees","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:19.749Z"},"updatedAt":"2026-04-25T11:33:15.424Z"}}