{"id":"a2d6a0db-cb3b-49a8-ab24-c86973913038","shortId":"TxWmuq","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 provides \"Premium API Access\" via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind per-request x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/benefits/30` is listed under the title \"Premium API Access\" but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts POST requests, and requires a maximum payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised — access is purely pay-per-call.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what data or functionality the `/api/v1/benefits/30` endpoint actually returns. The platform's landing page lists many other endpoints (analytics, AI, finance, utilities) all at the same $0.02 price point, but none have published schemas or example payloads. Prospective users should be aware that the actual response format and capabilities of this endpoint are undocumented.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","post-endpoint"],"categories":["api","payments"],"synonyms":["premium API","x402 API","micropayment API","pay-per-call API","lowpaymentfee","USDC API access","Base network API"],"warnings":["No documentation available — all doc/API/pricing/README pages show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","The exact functionality of /api/v1/benefits/30 is unknown; 'Premium API Access' is the only descriptor","No examples of request or response payloads available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/30","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/30","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no description of what the endpoint actually does beyond the generic label 'Premium API Access'. All doc pages return only 'Connect wallet' with no 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'0.02':10,24,135,228 '000':124 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':147 '0x8335':129 '20':123 '2913':130 '300':150 '6':140 'Base network API' 'USDC API access' 'accept':114 'access':6,20,36,96,161 'actual':209,246 'address':146 'advertis':160 'ai':62,221 'analyt':61,220 'api':5,19,35,58,95,154,174 'awar':243 'base':8,22,83,125,132 'base-network' 'behind':72 'beyond':104 'call':167 'capabl':250 'challeng':109 'confirm':110 'connect':183 'content':189 'data':60,203 'decim':141 'descript':200 'doc':173 'document':103,168 'endpoint':30,47,87,208,219,253 'equal':134 'exact':99 'exampl':237 'extrem':170 'financ':65,222 'format':248 'function':100,205 'gate':3,17,71 'host':54 'infrastructur':68 'key':155 'label':106 'land':214 'learn':64 'limit':158 'list':90,216 'live':113 'lowpaymentfee' 'lowpaymentfee.com':32,51 'machin':63 'made':144 'mani':46,217 'maximum':120 'micropay':77 'micropayment API' 'network':84 'no-api-key' 'none':232 'offer':48 'one':44 'openapi':193 'page':178,215 'pay':9,23,165 'pay-per-cal':164 'pay-per-call API' 'payload':238 'payment':40,121,142 'per':11,25,74,136,166 'per-request':73 'per-request-billing' 'platform':52,212 'point':230 'post':115 'post-endpoint' 'premium':4,18,34,94 'premium API' 'price':175,229 'prompt':185 'prospect':239 'protocol':41 'provid':33 'publish':234 'pure':163 'rate':157 'readm':177 'render':180 'request':12,26,75,116,137 'request/response':196 'requir':118 'respons':247 'return':210 'schema':197,235 'second':151 'settl':78 'span':59 'spars':171 'spec':194 'specif':86 'suit':56 'timeout':152 'titl':93 'undocu':255 'unit':126 'usdc':14,28,80,128,138 'usdc-micropayment' 'use':139 'user':240 'util':69,223 'via':37 'wallet':184 'web3':66 'x402':2,16,39,76,108 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"289351c3-4c80-4fe2-846f-a1ab1419942a","listingId":"a2d6a0db-cb3b-49a8-ab24-c86973913038","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/30","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:36.490Z"}],"sources":[{"listingId":"a2d6a0db-cb3b-49a8-ab24-c86973913038","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/30","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:36.490Z","lastSeenAt":"2026-04-22T02:31:44.599Z"}],"details":{"listingId":"a2d6a0db-cb3b-49a8-ab24-c86973913038","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/30 \\\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/benefits/30"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/30"}],"useCases":["Accessing a premium data or service endpoint with per-request USDC micropayments","Integrating x402-compatible agents that pay per API call without API keys","Testing x402 payment flows on the Base network"],"bestFor":["Developers experimenting with x402 micropayment protocols","Agents that need keyless, pay-per-call API access on Base","Low-volume consumers who prefer no subscriptions or commitments"],"notFor":["Users who need well-documented API schemas and response formats","High-volume production workloads requiring SLAs and support","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.389Z"},"updatedAt":"2026-04-22T02:31:44.599Z"}}