{"id":"249f4a57-8050-4ef4-b22f-fa948b162f34","shortId":"aagPAs","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 one of many x402-protocol-gated API endpoints offered by the provider. The specific resource `/api/v1/benefits/9` is labeled \"Premium API Access\" and returns JSON content. It accepts POST requests and is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required; payment is handled entirely via the x402 payment header.\n\nThe broader lowpaymentfee.com platform offers a suite of endpoints spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are priced uniformly at $0.02 per request with no minimums or commitments.\n\nHowever, the specific functionality behind `/api/v1/benefits/9` is not documented beyond the label \"Premium API Access.\" There is no OpenAPI schema, no request/response examples, and the crawled docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content. The actual data or service returned by this particular endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api","infrastructure"],"synonyms":["premium API","x402 API","pay-per-call API","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["The specific functionality of /api/v1/benefits/9 ('Premium API Access') is not documented anywhere — the actual data or service it provides is unknown.","No OpenAPI schema, request body schema, or response examples are available.","All documentation pages (docs, pricing, API, README) returned only a 'Connect wallet' prompt with no substantive content.","The endpoint name 'benefits/9' is opaque and could represent any arbitrary resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/9","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/benefits/9","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality behind 'Premium API Access' at /api/v1/benefits/9 is completely undocumented. The crawled docs/pricing/API pages were all blank beyond a wallet connect prompt. This is effectively a stub 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'pay-per-call API' 'pay-per-request' 'payment':98,105 'per':11,25,81,157 'platform':110 'post':62 'post-method' 'premium':4,18,53,176 'premium API' 'price':135,153,191 'prompt':201 'protocol':39 'provid':46 'quot':140 'rate':94,138 'report':120 'request':12,26,63,82,158 'request/response':185 'requir':97 'resourc':49 'return':57,196,211 'schema':183 'sentiment':127 'servic':210 'settl':66 'span':116 'specif':48,166 'suit':113 'summar':130 'text':129 'token':139 'uniform':154 'unit':86 'unknown':217 'usdc':14,28,72 'usdc-settlement' 'use':71 'util':145 'valid':147 'via':102 'wallet':200 'web3':134 'x402':2,16,38,104 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol-gated':37","prices":[{"id":"8ac44c7a-12c2-4025-bb77-8a487f0687ab","listingId":"249f4a57-8050-4ef4-b22f-fa948b162f34","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/benefits/9","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T20:29:38.311Z"}],"sources":[{"listingId":"249f4a57-8050-4ef4-b22f-fa948b162f34","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/9","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T20:29:38.311Z","lastSeenAt":"2026-04-22T01:01:59.322Z"}],"details":{"listingId":"249f4a57-8050-4ef4-b22f-fa948b162f34","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/9 \\\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":"Endpoint returns 402 with x402 challenge advertising USDC on Base network at maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/benefits/9"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/benefits/9"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a premium API resource with per-request USDC micropayments on Base","Integrating x402-compatible payment flows into agent workflows","Testing x402 protocol payment challenges against a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that can settle USDC payments on Base L2","Use cases requiring keyless, pay-per-request API access"],"notFor":["Users who need detailed documentation or known response schemas before integrating","Applications requiring free or subscription-based API access","Production workloads where the exact response payload must be well-defined"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.447Z"},"updatedAt":"2026-04-22T01:01:59.322Z"}}