{"id":"f6cbc893-1af1-486c-95e8-38066dac6f62","shortId":"dqGa9p","kind":"x402","title":"x402-gated API key endpoint on Base, paying $0.02 in USDC per request.","tagline":"x402-gated API key endpoint on Base, paying $0.02 in USDC per request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints on the lowpaymentfee.com platform, which offers a broad catalog of pay-per-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/apikeys/95` appears to be an API-key provisioning or management resource. The x402 challenge confirms it is live, accepting POST requests, and requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) per call. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nDocumentation on the site is extremely thin — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The platform advertises no API keys required, no rate limits, and instant access for all its endpoints, but the actual behavior and response format of this particular endpoint remain undocumented.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","api-key-provisioning","no-rate-limits"],"categories":["infrastructure","api-management"],"synonyms":["API key generation","premium API access","x402 API","pay-per-call API key","Base USDC API","lowpaymentfee"],"warnings":["No OpenAPI spec or request/response schema available","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content","The exact purpose and expected input/output of /api/v1/apikeys/95 is undocumented","No examples of successful responses are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/apikeys/95","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/apikeys/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on request/response schemas, no OpenAPI spec, and the docs pages are empty stubs. The purpose of the /apikeys/95 endpoint is unclear beyond its title. This is effectively a stub 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'0.02':10,24,77,130 '000':119 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '0x8335':124 '20':118 '2913':125 '300':141 '6':128 'API key generation' 'Base USDC API' 'accept':109 'access':36,197 'actual':204 'address':137 'advertis':187 'ai':66 'analyt':65 'api':4,18,35,62,96,154,189 'api-key':95 'api-key-provisioning' 'appear':91 'avail':181 'base':8,22,85,120,127 'behavior':205 'broad':55 'call':61,132 'catalog':56 'challeng':104 'confirm':105 'connect':162 'content':168 'crawl':184 'data':64 'decim':129 'doc':152 'document':144 'endpoint':6,20,30,47,89,201,212 'exact':115 'exampl':180 'extrem':149 'financ':69 'format':208 'gate':3,17 'infrastructur':72 'instant':196 'key':5,19,97,190 'learn':68 'limit':194 'live':108 'lowpaymentfee' 'lowpaymentfee.com':32,50 'machin':67 'manag':100 'mani':46 'network':86 'no-rate-limits' 'offer':53 'one':44 'openapi':172 'page':157 'particular':211 'pay':9,23,59 'pay-per-cal':58 'pay-per-call API key' 'pay-per-request' 'payment':40,116,133 'per':13,27,60,78,131 'platform':51,186 'post':110 'premium':34 'premium API access' 'price':75,153 'prompt':164 'protocol':41 'provid':33 'provis':98 'rate':193 'readm':156 'remain':213 'render':159 'request':14,28,79,111 'request/response':175 'requir':113,191 'resourc':101 'respons':207 'schema':176 'second':142 'sent':135 'settl':80 'site':147 'span':63 'spec':173 'specif':88 'thin':150 'timeout':143 'undocu':214 'unit':121 'usag':179 'usdc':12,26,82,123 'usdc-base' 'util':73 'via':37 'wallet':163 'web3':70 'x402':2,16,39,103 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"f93d132d-3ac9-4a6c-b28e-e2ecc75e56f5","listingId":"f6cbc893-1af1-486c-95e8-38066dac6f62","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/apikeys/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:38.571Z"}],"sources":[{"listingId":"f6cbc893-1af1-486c-95e8-38066dac6f62","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/apikeys/95","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:38.571Z","lastSeenAt":"2026-04-23T05:01:54.891Z"}],"details":{"listingId":"f6cbc893-1af1-486c-95e8-38066dac6f62","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/apikeys/95 \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\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 endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/apikeys/95"},{"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":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/apikeys/95"}],"useCases":["Programmatically provisioning or retrieving API keys via a single paid request","Agent-driven access to a gated API resource without pre-registration","Paying per call for API key management on Base L2"],"bestFor":["Agents needing on-demand API key access without signup","Developers who want to pay per request in USDC on Base","Automated workflows requiring instant, keyless API access"],"notFor":["Users who need detailed documentation or response schemas before integrating","High-volume use cases where $0.02 per request adds up significantly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.741Z"},"updatedAt":"2026-04-23T05:01:54.891Z"}}