{"id":"2c5ea3bb-99bd-47e4-bd35-79de235ebb0b","shortId":"scxZgD","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-call with USDC.","tagline":"x402-gated premium API endpoint on Base, pay-per-call with USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a broad catalog of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform use the same pricing model: $0.02 per request, settled in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/benefits/89` is listed under the title \"Premium API Access\" but the crawled documentation provides no further detail on what data or functionality this particular route returns. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires a maximum payment of 20,000 base units of USDC (0.02 USD) on Base (asset contract 0x8335…2913). The output schema indicates it returns application/json.\n\nBecause the crawled pages beyond the landing page returned only a \"Connect wallet\" prompt with no substantive documentation, the actual request/response schema for this endpoint is unknown. The platform advertises categories like analytics, AI inference, finance, and utilities, but it is unclear which category `/api/v1/benefits/89` belongs to. Agents should treat this as an opaque JSON endpoint until better documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","no-api-key","no-rate-limit"],"categories":["api","misc"],"synonyms":["premium API","lowpaymentfee","x402 API","USDC micropayment API","pay-per-call API","Base network API"],"warnings":["No documentation available for /api/v1/benefits/89 — the actual functionality is unknown.","All non-landing crawled pages returned only 'Connect wallet' with no substantive content.","No OpenAPI spec, no request schema, and no response schema are available.","The endpoint name 'Premium API Access' is generic and does not describe what data or service is provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/89","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/89","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no request/response schema, and no description of what 'Premium API Access' actually returns. The crawled docs/pricing/README pages all returned only 'Connect wallet' with no 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'0.02':85,158 '000':153 '0x8335':164 '20':152 '2913':165 'Base network API' 'USDC micropayment API' 'accept':143 'access':36,117 'actual':192 'advertis':202 'agent':220 'ai':67,206 'analyt':66,205 'api':5,19,35,63,97,116 'application/json':172 'asset':162 'base':8,22,93,154,161 'belong':218 'better':230 'beyond':177 'broad':56 'call':12,26 'catalog':57 'categori':203,216 'challeng':137 'commit':104 'confirm':138 'connect':184 'contract':163 'crawl':120,175 'data':65,128 'detail':125 'document':121,190,231 'endpoint':6,20,30,47,76,108,140,197,228 'financ':70,208 'function':130 'gate':3,17 'host':54 'indic':169 'infer':207 'infrastructur':73 'json':227 'json-api' 'key':98 'land':179 'learn':69 'like':204 'limit':101 'list':111 'live':142 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':68 'mani':46 'maximum':149 'model':84 'network':94 'no-api-key' 'no-rate-limit' 'offer':48 'one':44 'opaqu':226 'output':167 'page':176,180 'particular':132 'pay':10,24,60 'pay-per-cal':9,23 'pay-per-call API' 'pay-per-request':59 'payment':40,150 'per':11,25,61,86 'platform':52,79,201 'post':144 'premium':4,18,34,115 'premium API' 'price':83 'prompt':186 'protocol':41 'provid':33,122 'rate':100 'request':62,87,145 'request/response':193 'requir':105,147 'return':134,171,181 'rout':133 'schema':168,194 'settl':88 'span':64 'specif':107 'substant':189 'surfac':232 'titl':114 'treat':222 'unclear':214 'unit':155 'unknown':199 'usd':159 'usdc':14,28,90,157 'usdc-base' 'use':80 'util':74,210 'via':37 'wallet':185 'web3':71 'x402':2,16,39,136 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"4eca426f-fdbe-4444-8d69-db9dc0845fe7","listingId":"2c5ea3bb-99bd-47e4-bd35-79de235ebb0b","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/89","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T20:29:35.277Z"}],"sources":[{"listingId":"2c5ea3bb-99bd-47e4-bd35-79de235ebb0b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/89","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T20:29:35.277Z","lastSeenAt":"2026-04-22T02:31:45.245Z"}],"details":{"listingId":"2c5ea3bb-99bd-47e4-bd35-79de235ebb0b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/89 \\\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 challenge requesting 20,000 base units of USDC on Base (0.02 USD per request).","source_url":"https://lowpaymentfee.com/api/v1/benefits/89"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.","source_url":"https://lowpaymentfee.com/api/v1/benefits/89"}],"useCases":["Programmatic access to a premium data or service endpoint via x402 micropayment","Agent-driven API consumption without pre-registration or API keys","Demonstrating x402 payment protocol integration on Base"],"bestFor":["Developers experimenting with x402 pay-per-call patterns","AI agents that need keyless, on-demand API access","Low-volume consumers who prefer per-request pricing over subscriptions"],"notFor":["Users who need detailed API documentation before integrating","High-volume consumers who want bulk pricing or SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.635Z"},"updatedAt":"2026-04-22T02:31:45.245Z"}}