{"id":"27c1b767-0f2b-4c4d-a8ed-637c7a92f1af","shortId":"QS98kU","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 & machine learning, finance & Web3, and infrastructure categories. The specific endpoint `/api/v1/policies/26` is labeled \"Premium API Access\" and is gated via the x402 protocol on the Base network, accepting USDC payments.\n\nThe 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). Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. The endpoint accepts POST requests and returns application/json.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation beyond the landing page is essentially empty (all sub-pages just show \"Connect wallet\"), so the actual request/response schema for this specific endpoint is unknown. There is no OpenAPI spec, no example payloads, and no detailed documentation available. The endpoint's purpose — what \"Premium API Access\" actually returns — is not described anywhere in the crawled material.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","post-method"],"categories":["api-gateway","infrastructure"],"synonyms":["premium api","paid api access","x402 api","lowpaymentfee","micropayment api","base usdc api","pay-per-call api"],"warnings":["No documentation available — all doc/pricing/API pages show only 'Connect wallet'","No OpenAPI spec or request/response schema provided","The specific purpose of /api/v1/policies/26 ('Premium API Access') is undocumented and unclear","Cannot verify what data or service is returned after payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/policies/26","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/26","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 what this endpoint actually does, no request/response schema, and no examples. All doc pages return only 'Connect wallet'. The purpose of 'Premium API Access' at /api/v1/policies/26 is entirely 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'0.02':10,24,104 '000':93 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':120 '0x8335':98 '20':92 '2913':99 '300':123 '6':109 'accept':76,128 'access':6,20,64,145,194 'across':45 'actual':165,195 'address':119 'advertis':136 'ai':48 'analyt':47 'anywher':200 'api':5,19,44,63,138,193 'application/json':133 'avail':186 'base':8,22,74,94,101 'base usdc api' 'beyond':148 'broader':37 'categori':55 'challeng':81 'confirm':82 'connect':161 'crawl':203 'data':46 'decim':110 'describ':199 'detail':184 'document':147,185 'empti':154 'endpoint':30,58,84,127,171,188 'equal':103 'essenti':153 'exact':116 'exampl':180 'financ':51 'gate':3,17,67 'howev':146 'infrastructur':54 'instant':144 'json-api' 'key':139 'label':61 'land':150 'learn':50 'limit':142 'live':86 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':49 'made':113 'materi':204 'maximum':90 'micropayment api' 'network':75 'offer':39 'openapi':177 'page':151,158 'paid api access' 'part':34 'pay':9,23,41 'pay-per-call api' 'pay-per-request':40 'payload':181 'payment':78,111 'per':11,25,42,105 'platform':38,135 'post':129 'post-method' 'premium':4,18,62,192 'premium api' 'protocol':71 'purpos':190 'rate':141 'request':12,26,43,106,130 'request/response':166 'requir':88 'return':132,196 'schema':167 'scheme':117 'second':124 'show':160 'spec':178 'specif':57,170 'sub':157 'sub-pag':156 'timeout':125 'unit':95 'unknown':173 'usdc':14,28,77,97,107 'usdc-base' 'use':108 'via':68,114 'wallet':162 'web3':52 'x402':2,16,70,80 'x402 api' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"42ff067c-a288-4c3d-afe3-93187127c39f","listingId":"27c1b767-0f2b-4c4d-a8ed-637c7a92f1af","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/26","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:51:54.113Z"}],"sources":[{"listingId":"27c1b767-0f2b-4c4d-a8ed-637c7a92f1af","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/policies/26","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:51:54.113Z","lastSeenAt":"2026-04-23T08:01:37.378Z"}],"details":{"listingId":"27c1b767-0f2b-4c4d-a8ed-637c7a92f1af","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/policies/26 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/policies/26"},{"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 on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/policies/26"}],"useCases":["Accessing gated API resources without API keys via x402 micropayments","Programmatic pay-per-request access from AI agents on Base network","Integrating low-cost premium data or services into automated workflows"],"bestFor":["Developers wanting keyless, pay-per-use API access","AI agents with x402-compatible payment capabilities","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation before integrating","Applications requiring non-crypto payment methods","High-volume use cases where per-request pricing may not be economical"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:02.823Z"},"updatedAt":"2026-04-23T08:01:37.378Z"}}