{"id":"13433a8b-25ae-46d9-b028-195313c77b69","shortId":"AVyncb","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories. The specific endpoint `/api/v1/policies/92` is labeled \"Premium API Access\" and is gated via the x402 payment protocol. It accepts POST requests and returns JSON responses.\n\nThe x402 challenge confirms the endpoint is live on the Base network, accepting USDC (contract 0x8335…2913) with a maxAmountRequired of 20000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the platform's advertised flat pricing of $0.02/request across all endpoints. Payment is made via the x402 \"exact\" scheme with a 300-second timeout.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely sparse — the docs, API, pricing, 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 `/api/v1/policies/92` endpoint actually returns. The endpoint's purpose (\"Premium API Access\") is vague and does not clarify the data or functionality provided. Without documentation or example payloads, the actual utility of this specific endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","pay-per-request","json-response","post-method"],"categories":["api-gateway","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","The purpose and output of /api/v1/policies/92 ('Premium API Access') is undefined — unclear what data or functionality it provides","No example requests or responses available anywhere in crawled content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/policies/92","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/policies/92","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 ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation, no request/response examples, and the endpoint's actual purpose ('Premium API Access') is completely undefined. All non-landing pages return only 'Connect wallet' with no 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'/request':123 '0.02':10,24,110,122 '0x8335':93 '20000':99 '2913':94 '300':137 '6':105 'Base network API' 'USDC micropayment API' 'accept':71,90 'access':6,20,61,151,199 'across':45,124 'actual':191,217 'advertis':118,142 'ai/ml':48 'analyt':47 'api':5,19,44,60,144,159,198 'base':8,22,88,100 'base-network' 'broader':37 'categori':52 'challeng':80 'clarifi':205 'confirm':81 'connect':168 'consist':113 'content':174 'contract':92 'crypto-paid API' 'data':46,207 'decim':106 'descript':185 'doc':158 'document':153,212 'endpoint':30,55,83,126,190,194,222 'exact':133 'exampl':182,214 'extrem':155 'finance/web3':49 'flat':119 'function':209 'gate':3,17,64 'howev':152 'infrastructur':51 'instant':150 'json':76 'json-response' 'key':145 'label':58 'limit':148 'live':85 'lowpaymentfee' 'lowpaymentfee.com':32 'made':129 'maxamountrequir':97 'network':89 'offer':39 'openapi':178 'page':163 'part':34 'pay':9,23,41 'pay-per-call API' 'pay-per-request':40 'payload':215 'payment':68,127 'per':11,25,42,111 'platform':38,116,141 'post':72 'post-method' 'premium':4,18,59,197 'premium API access' 'price':120,160 'prompt':170 'protocol':69 'provid':210 'purpos':196 'rate':147 'readm':162 'remain':223 'render':165 'request':12,26,43,73,112 'request/response':181 'respons':77 'return':75,192 'schema':179 'scheme':134 'second':138 'sinc':102 'spars':156 'specif':54,221 'substant':173 'timeout':139 'translat':108 'unclear':224 'unit':101 'usdc':14,28,91,103 'usdc-payment' 'use':104 'util':218 'vagu':201 'via':65,130 'wallet':169 'without':211 'x402':2,16,67,79,132 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"a14e18bb-d00c-4de2-ac32-02facb36fed4","listingId":"13433a8b-25ae-46d9-b028-195313c77b69","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/policies/92","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:52:05.042Z"}],"sources":[{"listingId":"13433a8b-25ae-46d9-b028-195313c77b69","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/policies/92","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:52:05.042Z","lastSeenAt":"2026-04-23T06:31:18.671Z"}],"details":{"listingId":"13433a8b-25ae-46d9-b028-195313c77b69","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/policies/92 \\\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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/policies/92"},{"claim":"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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/policies/92"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven API consumption without API keys or subscriptions","Programmatic pay-as-you-go access to platform services"],"bestFor":["Developers wanting keyless, pay-per-request API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or schemas before integrating","Applications requiring free or fiat-only payment methods","Use cases that need clearly defined request/response contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:02.238Z"},"updatedAt":"2026-04-23T06:31:18.671Z"}}