{"id":"f5848119-d55e-4537-9d91-c35283331be1","shortId":"5hSsYC","kind":"x402","title":"Pay-per-call analytics metrics endpoint on Base via x402 at $0.02/request.","tagline":"Pay-per-call analytics metrics endpoint on Base via x402 at $0.02/request.","description":"The `/api/v1/analytics/metrics` endpoint on lowpaymentfee.com is an x402-enabled API that provides data analytics metrics. It is part of a broader platform offering 16+ endpoints spanning data & analytics, AI/ML, finance/Web3, and infrastructure utilities — all priced uniformly at $0.02 per request and settled in USDC on the Base network.\n\nThe endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers include an `X-PAYMENT` header with a signed payment of up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). There are no API keys, no rate limits, and no upfront commitments — each call is independently paid for on-chain. The payment recipient address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and the USDC asset contract is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base.\n\nDocumentation is extremely sparse. The landing page lists available endpoints and pricing, but the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what specific metrics are returned or what input parameters are accepted. The endpoint is confirmed live (returns a proper 402 challenge), but the actual functionality behind the paywall is unknown from publicly available information.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","analytics-metrics","pay-per-call","no-api-key","json-response"],"categories":["analytics","data"],"synonyms":["metrics API","data analytics","analytics endpoint","pay-per-request API","x402 analytics","lowpaymentfee","USDC API","Base network API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or input/output schema provided; request parameters and response format are unknown","Actual data returned by the metrics endpoint is unverified — cannot confirm what analytics are served","The platform lists 16+ endpoints but none have public documentation describing their behavior"],"endpointUrl":"https://lowpaymentfee.com/api/v1/analytics/metrics","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/analytics/metrics","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation beyond a landing page listing. The actual functionality behind the paywall is entirely opaque from public 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'/request':14,28 '0.02':13,27,67,114 '000':108 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':146 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':153 '16':53 '20':107 '402':218 '6':118 'Base network API' 'USDC API' 'accept':80,209 'actual':222 'address':144 'ai/ml':58 'analyt':5,19,43,57 'analytics endpoint' 'analytics-metrics' 'api':39,123,171 'asset':150 'avail':164,231 'base':9,23,76,109,155 'base-network' 'behind':224 'broader':50 'call':4,18,133 'caller':93 'chain':140 'challeng':219 'commit':131 'confirm':213 'connect':180 'content':186 'contract':151 'data':42,56 'data analytics' 'decim':119 'descript':197 'doc':170 'document':156 'enabl':38 'endpoint':7,21,31,54,79,165,211 'exampl':194 'extrem':158 'finance/web3':59 'function':223 'handl':88 'header':99 'i.e':113 'includ':94 'independ':135 'inform':232 'infrastructur':61 'input':206 'json':85 'json-response' 'key':124 'land':161 'limit':127 'list':163 'live':214 'lowpaymentfee' 'lowpaymentfee.com':33 'metric':6,20,44,201 'metrics API' 'network':77 'no-api-key' 'offer':52 'on-chain':138 'openapi':190 'page':162,175 'paid':136 'paramet':207 'part':47 'pay':2,16 'pay-per-cal':1,15 'pay-per-call' 'pay-per-request API' 'payment':86,98,103,142 'paywal':226 'per':3,17,68 'platform':51 'post':81 'price':64,167,172 'prompt':182 'proper':217 'protocol':92 'provid':41 'public':230 'rate':126 'readm':174 'recipi':143 'render':177 'request':69,82 'request/response':193 'return':84,203,215 'schema':191 'settl':71 'sign':102 'sinc':115 'span':55 'spars':159 'specif':200 'uniform':65 'unit':110 'unknown':228 'upfront':130 'usdc':73,112,116,149 'usdc-settlement' 'use':117 'util':62 'via':10,24,89 'wallet':181 'x':97 'x-payment':96 'x402':11,25,37,91 'x402 analytics' 'x402-enabled':36 'x402-payment'","prices":[{"id":"ff12f901-bb1d-43b2-8e59-71062d45e8b8","listingId":"f5848119-d55e-4537-9d91-c35283331be1","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/analytics/metrics","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:58.168Z"}],"sources":[{"listingId":"f5848119-d55e-4537-9d91-c35283331be1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/analytics/metrics","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:58.168Z","lastSeenAt":"2026-04-22T20:00:22.846Z"}],"details":{"listingId":"f5848119-d55e-4537-9d91-c35283331be1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/analytics/metrics \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\"","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","source_url":"https://lowpaymentfee.com/api/v1/analytics/metrics"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/analytics/metrics"},{"claim":"The platform offers 16+ endpoints across data & analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching analytics metrics on a per-call basis without subscription commitments","Agent-driven data retrieval with automatic micropayment settlement","Integrating analytics data into workflows that support x402 payment protocol"],"bestFor":["Developers or agents wanting pay-per-use analytics without API key management","x402-compatible agents on the Base network","Low-volume or sporadic analytics queries where subscription pricing is wasteful"],"notFor":["Users needing detailed documentation or guaranteed SLAs before integrating","High-volume analytics consumers who would benefit from bulk pricing","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T19:32:32.567Z"},"updatedAt":"2026-04-22T20:00:22.846Z"}}