{"id":"e39f3d88-e533-4fed-bcd2-18864697c870","shortId":"nRRcgp","kind":"x402","title":"Pay-per-call data insights endpoint on Base via x402, $0.02/request in USDC.","tagline":"Pay-per-call data insights endpoint on Base via x402, $0.02/request in USDC.","description":"The `/api/v1/data/insights` endpoint at lowpaymentfee.com is one of several x402-enabled APIs offered by this provider. It accepts POST requests and returns JSON responses, gated behind a per-call USDC payment on the Base network. The x402 challenge confirms the endpoint is live and requires a maximum of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). No API keys, rate limits, or subscriptions are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe provider's landing page lists this endpoint under \"Data & Analytics\" alongside metrics, reports, and data-export APIs, all priced at $0.02/request. However, the crawled documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The actual data domain served by the \"Insights API\" is not described anywhere in the crawled material, so it is unclear what kind of insights are returned or what input parameters are expected.\n\nBecause the endpoint is confirmed live (402 challenge captured) but lacks any documentation about request format, response schema, or the nature of the data it provides, this listing carries significant uncertainty. Prospective callers should test with a small payment to discover the actual behavior.","tags":[],"capabilities":["x402-payment","per-call-pricing","usdc-base","json-response","data-insights","no-api-key","no-rate-limit"],"categories":["data","analytics"],"synonyms":["data insights API","analytics endpoint","pay-per-call data","x402 data API","USDC micropayment API","Base network API","lowpaymentfee insights"],"warnings":["No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no technical content.","No OpenAPI or schema definition found; request parameters and response format are completely unknown.","The nature of the 'insights' data is undocumented — it is unclear what this endpoint actually returns.","No examples or sample payloads are available from the provider."],"endpointUrl":"https://lowpaymentfee.com/api/v1/data/insights","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/data/insights","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no description of what 'insights' the API actually returns. This is effectively a stub 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'/request':13,28,146 '0.02':12,27,93,145 '000':82 '0x8335':87 '20':81 '2913':88 '402':219 '6':98 'Base network API' 'USDC micropayment API' 'accept':49 'actual':181,255 'alongsid':134 'analyt':133 'analytics endpoint' 'anywher':192 'api':43,101,141,188 'attach':111 'avail':179 'base':9,24,66,83,90 'behavior':256 'behind':57 'call':4,19,61 'caller':109,245 'captur':221 'carri':241 'challeng':70,220 'confirm':71,217 'connect':158 'crawl':149,195 'data':5,20,132,139,182,236 'data insights API' 'data-export':138 'data-insights' 'decim':99 'describ':191 'detail':165 'discov':253 'doc':152 'document':150,174,225 'domain':183 'enabl':42 'endpoint':7,22,33,73,130,215 'equal':92 'exampl':177 'expect':212 'export':140 'format':228 'gate':56 'header':116 'howev':147 'input':209 'insight':6,21,187,204 'json':54 'json-response' 'key':102 'kind':202 'lack':223 'land':126 'limit':104 'list':128,240 'live':75,218 'lowpaymentfee insights' 'lowpaymentfee.com':35 'materi':196 'maximum':79 'metric':135 'natur':233 'network':67 'no-api-key' 'no-rate-limit' 'offer':44 'one':37 'openapi':169 'page':127,151 'paramet':210 'pay':2,17 'pay-per-cal':1,16 'pay-per-call data' 'payload':178 'payment':63,115,121,251 'per':3,18,60,94 'per-cal':59 'per-call-pricing' 'post':50 'price':143,153 'prompt':160 'proof':122 'prospect':244 'provid':47,124,238 'rate':103 'readm':154 'report':136 'request':51,95,227 'request/response':172 'requir':77,108 'respons':55,229 'return':53,155,206 'schema':173,230 'serv':184 'sever':39 'signific':242 'simpli':110 'small':250 'spec':170 'subscript':106 'technic':164 'test':247 'uncertainti':243 'unclear':200 'unit':84 'usdc':15,30,62,86,96 'usdc-base' 'use':97 'valid':119 'via':10,25 'wallet':159 'x':114 'x-payment':113 'x402':11,26,41,69,120 'x402 data API' 'x402-enabled':40 'x402-payment'","prices":[{"id":"fdf40f22-19dd-4200-8217-6417d973395d","listingId":"e39f3d88-e533-4fed-bcd2-18864697c870","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/data/insights","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:34:29.318Z"}],"sources":[{"listingId":"e39f3d88-e533-4fed-bcd2-18864697c870","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/data/insights","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:29.318Z","lastSeenAt":"2026-04-22T19:30:33.644Z"}],"details":{"listingId":"e39f3d88-e533-4fed-bcd2-18864697c870","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/data/insights \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requiring 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/data/insights"},{"claim":"The provider lists this endpoint under 'Data & Analytics' at $0.02/request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (docs, pricing, README) returned only a 'Connect wallet' prompt with no technical content.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching on-demand data insights without subscription commitments","Agent-driven data retrieval with per-call crypto micropayments","Integrating analytics data into workflows that settle payments on Base"],"bestFor":["Agents or developers wanting zero-signup, pay-per-use data access","Crypto-native applications that can settle USDC on Base","Low-volume or exploratory data queries where $0.02/call is acceptable"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume batch workloads where per-call pricing would be expensive","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:17:11.011Z"},"updatedAt":"2026-04-22T19:30:33.644Z"}}