{"id":"b7ec2da5-8e7d-4746-a8e9-a6fcd2a8e7a4","shortId":"sRUcwL","kind":"x402","title":"Pay-per-request email data endpoint on Base via x402, settled in USDC at $0.02/call.","tagline":"Pay-per-request email data endpoint on Base via x402, settled in USDC at $0.02/call.","description":"This endpoint at `/api/v1/emails/85` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data & analytics, AI/ML, finance, infrastructure, and more. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific resource at `/emails/85` is labeled \"Premium API Access\" and accepts POST requests. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe broader platform advertises a uniform $0.02/request pricing model with no API keys, no rate limits, no minimums, and instant access. However, the `/api/v1/emails/85` endpoint is not listed among the publicly advertised API categories on the landing page (which covers analytics, AI, finance, and utilities). There is no documentation describing what this specific email endpoint returns — the crawled docs, API, pricing, and README pages all rendered only a \"Connect wallet\" prompt with no substantive content.\n\nWithout documentation or schema details, the exact functionality of this endpoint is unknown. It likely returns some form of email-related data (possibly a specific email record identified by ID 85), but this is speculative. The endpoint is confirmed live via a valid 402 challenge. Agents should be aware that the lack of input/output schema documentation means integration requires experimentation or direct contact with the provider.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","email-data","post-method"],"categories":["data"],"synonyms":["email API","premium API access","lowpaymentfee","x402 email endpoint","pay-per-call email","USDC API","Base network API"],"warnings":["The /api/v1/emails/85 endpoint is not listed among the provider's publicly advertised APIs — its purpose is unclear.","No documentation, input schema, or output schema is available for this endpoint.","All crawled subpages (docs, api, pricing, README) returned only a 'Connect wallet' prompt with no content.","The exact data returned by this endpoint is unknown; integration requires experimentation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/emails/85","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/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (valid 402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, and the specific /emails/85 resource is not listed on the provider's landing page. The crawled docs/API/pricing pages are empty beyond a wallet connect prompt. Functionality is essentially 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'/call':17,34 '/emails/85':81 '/request':114 '0.02':16,33,104,113 '000':95 '20':94 '402':227 '6':100 '85':214 'Base network API' 'USDC API' 'accept':88 'access':86,128 'advertis':110,139 'agent':229 'ai':149 'ai/ml':58 'among':136 'analyt':57,148 'api':54,85,119,140,167 'awar':232 'base':9,26,75,96 'base-network' 'broader':108 'categori':141 'challeng':228 'collect':48 'confirm':222 'connect':176 'contact':246 'content':182 'cover':147 'crawl':165 'data':6,23,56,205 'decim':101 'describ':157 'detail':187 'direct':245 'doc':166 'document':156,184,239 'email':5,22,161,203,209 'email API' 'email-data' 'email-rel':202 'endpoint':7,24,36,64,132,162,193,220 'equal':103 'exact':189 'experiment':243 'financ':59,150 'form':200 'function':190 'howev':129 'id':213 'identifi':211 'infrastructur':60 'input/output':237 'instant':127 'integr':241 'key':120 'label':83 'lack':235 'land':144 'like':197 'limit':123 'list':135 'live':223 'lowpaymentfee' 'lowpaymentfee.com':43 'mean':240 'minimum':125 'model':116 'network':76 'offer':46 'page':145,171 'part':40 'pay':2,19,51 'pay-per-call email' 'pay-per-request':1,18,50 'payment':68 'per':3,20,52,105 'platform':44,109 'possibl':206 'post':89 'post-method' 'premium':84 'premium API access' 'price':92,115,168 'prompt':178 'protocol':69 'provid':249 'public':138 'rate':122 'readm':170 'record':210 'relat':204 'render':173 'request':4,21,53,90,106 'requir':242 'resourc':79 'return':163,198 'schema':186,238 'settl':12,29,70 'span':55 'specif':78,160,208 'specul':218 'substant':181 'uniform':112 'unit':97 'unknown':195 'usdc':14,31,72,99 'usdc-settlement' 'use':65 'util':152 'valid':226 'via':10,27,224 'wallet':177 'without':183 'x402':11,28,67 'x402 email endpoint' 'x402-payment'","prices":[{"id":"3fb80701-a161-456a-a872-9e131cf3a27d","listingId":"b7ec2da5-8e7d-4746-a8e9-a6fcd2a8e7a4","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/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:13.128Z"}],"sources":[{"listingId":"b7ec2da5-8e7d-4746-a8e9-a6fcd2a8e7a4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/emails/85","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:13.128Z","lastSeenAt":"2026-04-25T11:33:15.422Z"}],"details":{"listingId":"b7ec2da5-8e7d-4746-a8e9-a6fcd2a8e7a4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/emails/85 \\\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 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/emails/85"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/emails/85"}],"useCases":["Retrieving email-related data on a per-request payment basis","Agent-driven data access without API key provisioning","Programmatic access to email records settled via crypto micropayments"],"bestFor":["Agents needing keyless, pay-per-use API access","Developers who want to avoid subscription commitments for occasional email data lookups","x402-compatible clients on the Base network"],"notFor":["Users needing well-documented, schema-specified email APIs","High-volume email processing where per-request pricing is inefficient","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:19.754Z"},"updatedAt":"2026-04-25T11:33:15.422Z"}}