{"id":"123925c3-e73f-42bd-a945-00cd90bcb4d0","shortId":"rERJbF","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no keys, no rate limits.","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-call APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints on the platform share the same pricing model: $0.02 per request, settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/benefits/53` is listed under the title \"Premium API Access\" but the crawled material does not describe what data or functionality it returns beyond the generic label. The x402 challenge confirms the endpoint is live, accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given 6 decimals), and pays out to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The platform advertises no API keys, no rate limits, and instant access.\n\nBecause the crawled documentation pages (docs, pricing, README) all returned only a \"Connect wallet\" prompt with no substantive content, the actual request/response schema for this endpoint is unknown. There is no OpenAPI spec, no example payloads, and no detailed documentation available. Users should expect a JSON response (mimeType is application/json) but the exact fields are undocumented.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","no-api-key","json-response","post-method"],"categories":["general","api-marketplace"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC micropayment API","lowpaymentfee","Base network API","402 payment API"],"warnings":["The specific functionality of /api/v1/benefits/53 is undocumented — 'Premium API Access' is the only description available.","No OpenAPI spec, no request/response schema, and no example payloads are provided.","All documentation pages (docs, pricing, README, api) returned only a 'Connect wallet' prompt with no substantive content.","The platform lists many endpoints but none have detailed docs in the crawl; treat with caution."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/53","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/53","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 there is no documentation, no OpenAPI spec, no request/response schema, and the purpose of '/api/v1/benefits/53' is entirely unclear beyond the generic 'Premium API Access' label. All doc pages returned only 'Connect wallet' with no 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'0.02':10,29,95,156 '000':150 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':165 '20':149 '402 payment API' '6':158 'Base network API' 'USDC micropayment API' 'accept':142 'access':6,25,46,116,177 'actual':198 'address':164 'advertis':168 'ai':77 'analyt':76 'api':5,24,45,73,115,170 'application/json':227 'avail':218 'base':8,27,103,151 'base-network' 'beyond':130 'broad':66 'call':72 'catalog':67 'challeng':136 'charg':145 'confirm':137 'connect':190 'content':196 'crawl':119,180 'data':75,125 'decim':159 'describ':123 'detail':216 'doc':183 'document':181,217 'endpoint':40,57,86,107,139,203 'exact':230 'exampl':212 'expect':221 'field':231 'financ':80 'function':127 'gate':3,22 'generic':132 'given':157 'host':64 'i.e':155 'infrastructur':83 'instant':176 'json':223 'json-response' 'key':16,35,171 'label':133 'learn':79 'limit':19,38,174 'list':110 'live':141 'lowpaymentfee' 'lowpaymentfee.com':42,61 'machin':78 'mani':56 'materi':120 'maximum':147 'mimetyp':225 'model':94 'network':104 'no-api-key' 'offer':58 'one':54 'openapi':209 'page':182 'pay':9,28,70,161 'pay-per-cal':69 'pay-per-call API' 'pay-per-request' 'payload':213 'payment':50 'per':11,30,71,96 'platform':62,89,167 'post':143 'post-method' 'premium':4,23,44,114 'premium API' 'price':93,184 'prompt':192 'protocol':51 'provid':43 'rate':18,37,173 'readm':185 'request':12,31,97,144 'request/response':199 'respons':224 'return':129,187 'schema':200 'settl':98 'share':90 'span':74 'spec':210 'specif':106 'substant':195 'titl':113 'undocu':233 'unit':152 'unknown':205 'usdc':14,33,100,154 'usdc-settlement' 'user':219 'util':84 'via':47 'wallet':191 'web3':81 'x402':2,21,49,135 'x402 endpoint' 'x402-gated':1,20 'x402-payment'","prices":[{"id":"3652fa5f-7a05-4edf-8d88-4fe28765e019","listingId":"123925c3-e73f-42bd-a945-00cd90bcb4d0","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/53","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:40.819Z"}],"sources":[{"listingId":"123925c3-e73f-42bd-a945-00cd90bcb4d0","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/53","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:40.819Z","lastSeenAt":"2026-04-22T05:31:54.075Z"}],"details":{"listingId":"123925c3-e73f-42bd-a945-00cd90bcb4d0","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/53 \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/benefits/53"},{"claim":"All endpoints on the platform cost $0.02 per request with no API keys, no rate limits, and instant access","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 address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/benefits/53"}],"useCases":["Accessing a premium API endpoint without needing to register or manage API keys","Making one-off paid API calls settled instantly in USDC on Base","Integrating pay-per-request services into agent workflows via x402"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet","Use cases requiring free or high-volume bulk access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.141Z"},"updatedAt":"2026-04-22T05:31:54.075Z"}}