{"id":"ecd4bf13-ab17-4114-8dc5-406e711cd156","shortId":"XhaZGr","kind":"x402","title":"x402-gated premium API access on Base, paid per-request in USDC.","tagline":"x402-gated premium API access on Base, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com is one of many x402-protocol-gated API resources offered by the provider. The specific resource at `/api/v1/generate/resource/36` is listed as \"Premium API Access\" and returns an x402 challenge requiring payment in USDC on the Base network. The provider's site advertises a broad catalog of endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments.\n\nThe x402 challenge for this particular resource specifies a `maxAmountRequired` of 20000 (in USDC's 6-decimal representation, equating to $0.02), settling to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract on Base (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The endpoint accepts HTTP POST and is discoverable. The payment scheme is \"exact\" with a timeout of 300 seconds.\n\nHowever, the actual functionality behind this specific resource path (`/resource/36`) is unclear. The provider's landing page lists named endpoints (metrics, reports, sentiment analysis, etc.) but does not reference `/api/v1/generate/resource/36` by name. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a \"Connect wallet\" prompt with no substantive content. Without documentation or example responses, the actual output of this endpoint cannot be confirmed.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","per-request-billing","http-post","no-api-key"],"categories":["api-gateway","infrastructure"],"synonyms":["pay-per-call API","x402 endpoint","USDC API","Base network API","micropayment API","lowpaymentfee","premium API"],"warnings":["The specific resource path /api/v1/generate/resource/36 is not listed among the named endpoints on the provider's landing page — its actual functionality is unknown.","All documentation pages (/docs, /pricing, /README, /api) returned only a 'Connect wallet' prompt with no substantive documentation.","Without example responses or an output schema, the value delivered by this endpoint cannot be verified.","The provider site lists many diverse endpoints (analytics, AI, finance, utils) but none map to this resource path, raising questions about what this endpoint actually returns."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/36","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/generate/resource/36","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, but the actual functionality behind /api/v1/generate/resource/36 is undocumented. All doc/pricing/README pages returned only 'Connect wallet' with no content. No response schema, no examples, and no description of what the endpoint actually does beyond the generic 'Premium API Access' 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'/docs':193 '/pricing':194 '/readme':195 '/resource/36':168 '0.02':95,128 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':139 '20000':119 '300':157 '6':123 'Base network API' 'USDC API' 'accept':142 'access':6,20,57 'actual':161,212 'address':131 'advertis':75 'ai':84 'analysi':182 'analyt':83 'api':5,19,41,56,100 'base':8,22,69,138 'base-network' 'behind':163 'broad':77 'cannot':217 'catalog':78 'challeng':62,110 'commit':107 'confirm':219 'connect':199 'content':205 'contract':136 'data':82 'decim':124 'discover':147 'document':191,207 'endpoint':30,80,141,178,216 'equat':126 'etc':183 'exact':152 'exampl':209 'financ':87 'function':162 'gate':3,17,40 'howev':159 'http':143 'http-post' 'infrastructur':90 'key':101 'land':174 'learn':86 'limit':104 'list':53,176 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':85 'mani':36 'maxamountrequir':117 'metric':179 'micropayment API' 'name':177,190 'network':70 'no-api-key' 'offer':43 'one':34 'output':213 'page':175,192 'paid':9,23 'particular':113 'path':167 'pay-per-call API' 'payment':64,149 'per':11,25,96 'per-request':10,24 'per-request-billing' 'post':144 'premium':4,18,55 'premium API' 'price':93 'prompt':201 'protocol':39 'provid':46,72,172 'rate':103 'refer':187 'report':180 'represent':125 'request':12,26,97 'requir':63 'resourc':42,49,114,166 'respons':210 'return':59,196 'scheme':150 'second':158 'sentiment':181 'settl':129 'site':74 'span':81 'specif':48,165 'specifi':115 'substant':204 'timeout':155 'unclear':170 'usdc':14,28,66,121,135 'usdc-payment' 'use':133 'util':91 'wallet':200 'web3':88 'without':206 'x402':2,16,38,61,109 'x402 endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol-gated':37","prices":[{"id":"138f1669-f435-4496-8365-c32e273ae1d2","listingId":"ecd4bf13-ab17-4114-8dc5-406e711cd156","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/generate/resource/36","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:08.707Z"}],"sources":[{"listingId":"ecd4bf13-ab17-4114-8dc5-406e711cd156","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/36","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:08.707Z","lastSeenAt":"2026-04-24T15:01:52.261Z"}],"details":{"listingId":"ecd4bf13-ab17-4114-8dc5-406e711cd156","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/36\n# Returns 402 with x402 challenge. Include X-PAYMENT header with signed USDC payment to proceed.","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/generate/resource/36","method":"POST","headers":{"X-PAYMENT":"<signed-x402-payment-token>","Content-Type":"application/json"}},"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 USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/36"},{"claim":"The provider advertises $0.02 per request 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/generate/resource/36"},{"claim":"Documentation pages returned only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Programmatic access to a gated API resource with per-call USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can sign USDC transactions on Base","Use cases requiring no-signup, no-API-key access"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible wallet holding USDC","Production workloads requiring well-documented response schemas"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:00.53Z"},"updatedAt":"2026-04-24T15:01:52.261Z"}}