{"id":"91e338f3-c0dc-42e3-b0db-da38399dc1f6","shortId":"fEDFPB","kind":"x402","title":"x402-gated premium API endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API endpoint 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 — all gated via the x402 payment protocol. The specific resource `/api/v1/generate/resource/87` is listed as \"Premium API Access\" and accepts POST requests. Payment is settled in USDC on the Base network at $0.02 per call (20,000 base units with 6 decimals).\n\nThe platform advertises a simple pricing model: $0.02 per request with no API keys, no rate limits, no minimums, and instant access. The x402 challenge confirms the endpoint is live, returning a proper 402 Payment Required response with an `exact` payment scheme. The payment timeout is 300 seconds. However, the actual functionality behind this specific resource path (`/resource/87`) is not documented — the landing page lists many named endpoints (metrics, reports, sentiment analysis, summarization, etc.) but `/generate/resource/87` does not appear among them.\n\nDocumentation is extremely sparse. The /docs, /pricing, /api, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no examples available. Without knowing what this endpoint actually returns, agents should treat this as an opaque premium resource endpoint with unknown output.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","post-endpoint","json-response"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The specific path /api/v1/generate/resource/87 is not listed among the platform's documented endpoints — its actual functionality is unknown.","All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no content.","No OpenAPI spec or response schema is available; the output format is entirely unknown.","The platform lists many endpoint categories but none match this resource path precisely."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/87","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/87","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, confirming pricing and payment details. However, the actual functionality of /api/v1/generate/resource/87 is undocumented — it does not appear in the site's listed endpoints. There is no OpenAPI spec, no request/response schema, no examples, and all documentation pages are empty. This is effectively a stub 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'/api/v1/generate/resource/87':63 '/docs':180 '/generate/resource/87':169 '/pricing':181 '/readme':184 '/resource/87':151 '0.02':10,24,84,101 '000':88 '20':87 '300':140 '402':127 '6':92 'Base network API' 'USDC micropayment endpoint' 'accept':71 'access':69,115 'across':45 'actual':144,214 'advertis':96 'agent':216 'ai/ml':48 'among':173 'analysi':165 'analyt':47 'api':5,19,44,68,106 'appear':172 'avail':208 'base':8,22,81,89 'behind':146 'broader':37 'call':86 'categori':52 'challeng':118 'confirm':119 'connect':190 'content':196 'crypto-paid API' 'data':46 'decim':93 'document':154,175 'endpoint':6,20,30,121,161,213,225 'etc':167 'exact':133 'exampl':207 'extrem':177 'finance/web3':49 'function':145 'gate':3,17,54 'howev':142 'infrastructur':51 'instant':114 'json-response' 'key':107 'know':210 'land':156 'limit':110 'list':65,158 'live':123 'lowpaymentfee' 'lowpaymentfee.com':32 'mani':159 'metric':162 'minimum':112 'model':100 'name':160 'network':82 'offer':39 'opaqu':222 'openapi':200 'output':228 'page':157,185 'part':34 'path':150 'pay':9,23,41 'pay-per-call API' 'pay-per-request':40 'payment':58,74,128,134,137 'per':11,25,42,85,102 'platform':38,95 'post':72 'post-endpoint' 'premium':4,18,67,223 'premium API access' 'price':99 'prompt':192 'proper':126 'protocol':59 'rate':109 'report':163 'request':12,26,43,73,103 'request/response':203 'requir':129 'resourc':62,149,224 'respons':130 'return':124,187,215 'schema':204 'scheme':135 'second':141 'sentiment':164 'settl':76 'simpl':98 'spars':178 'spec':201 'specif':61,148 'substant':195 'summar':166 'timeout':138 'treat':218 'unit':90 'unknown':227 'usdc':14,28,78 'usdc-base' 'via':55 'wallet':191 'without':209 'x402':2,16,57,117 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"6af757e0-0ea1-4757-a78e-9d327727ca91","listingId":"91e338f3-c0dc-42e3-b0db-da38399dc1f6","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/87","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:12.206Z"}],"sources":[{"listingId":"91e338f3-c0dc-42e3-b0db-da38399dc1f6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/87","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:12.206Z","lastSeenAt":"2026-04-24T10:32:13.686Z"}],"details":{"listingId":"91e338f3-c0dc-42e3-b0db-da38399dc1f6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/87 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/generate/resource/87","body":{},"method":"POST","headers":{"X-PAYMENT":"<x402-encoded-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 valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/87"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/87"},{"claim":"Platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium resource via x402 micropayment","Agent-driven API consumption without API keys or subscriptions","Paying per-request in USDC on Base for on-demand data or generation"],"bestFor":["Agents that can settle x402 payments in USDC on Base","Use cases requiring keyless, pay-as-you-go API access","Low-friction one-shot API calls without account setup"],"notFor":["Users who need detailed documentation or known response schemas before integrating","High-volume use cases where per-request pricing at $0.02 adds up significantly","Anyone unable to transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:42.682Z"},"updatedAt":"2026-04-24T10:32:13.686Z"}}