{"id":"6326f656-2db9-4a6e-902d-f78d689d8c63","shortId":"WWFFRT","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/v1/trades/116` appears to be part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform are priced at $0.02 per request, settled in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge for this particular endpoint advertises a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the `exact` scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout. The endpoint accepts HTTP POST requests and returns application/json.\n\nHowever, the specific functionality of `/api/v1/trades/116` is unclear. It does not appear in the site's listed API catalog, and the path pattern (`/trades/116`) suggests it may return data about a specific trade or transaction identified by ID 116. No request/response schema documentation was found, and the crawled docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without documentation or example payloads, the exact input parameters and response format remain unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","json-response","no-api-key","http-post"],"categories":["finance","data"],"synonyms":["trade data API","x402 API","USDC micropayment API","pay-per-request API","Base network API","lowpaymentfee","crypto trade endpoint"],"warnings":["The specific endpoint /api/v1/trades/116 is not listed in the site's published API catalog — its purpose is unclear","All documentation pages (docs, pricing, README, api) returned only 'Connect wallet' with no substantive content","No request body schema or response schema is available","No OpenAPI spec or AI plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/116","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/trades/116","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but the specific /trades/116 resource is not documented anywhere on the site. No request/response schema, no examples, and all doc pages returned only 'Connect wallet' with no content. The exact functionality is 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'/request':13,28 '/trades/116':178 '0.02':12,27,83,125 '000':114 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':140 '0x8335':119 '116':193 '20':113 '2913':120 '300':143 '6':129 'Base network API' 'USDC micropayment API' 'accept':148 'access':7,22,38 'address':139 'advertis':109 'ai/ml':68 'analyt':67 'api':6,21,37,63,95,172 'appear':48,166 'application/json':154 'base':9,24,91,115,122 'base-network' 'broader':54 'call':4,19,62 'catalog':173 'challeng':104 'commit':100 'connect':212 'content':218 'crawl':202 'crypto trade endpoint' 'data':66,71,183 'decim':130 'doc':203 'document':197,220 'dozen':57 'endpoint':32,64,76,108,147 'equal':124 'exact':136,225 'exampl':222 'finance/web3':70 'format':230 'found':199 'function':158 'given':126 'howev':155 'http':149 'http-post' 'id':192 'identifi':190 'infer':69 'input':226 'json-response' 'key':96 'limit':98 'list':171 'lowpaymentfee' 'lowpaymentfee.com':34 'made':133 'maxamountrequir':111 'may':181 'network':92 'no-api-key' 'offer':56 'page':207 'paramet':227 'part':51 'particular':107 'path':176 'pattern':177 'pay':2,17,60 'pay-per-cal':1,16,59 'pay-per-call' 'pay-per-request API' 'payload':223 'payment':42,131 'per':3,18,61,84 'platform':55,79 'post':150 'premium':5,20,36 'price':81,204 'prompt':214 'protocol':43 'provid':35 'rate':97 'readm':206 'remain':231 'request':85,151 'request/response':195 'requir':101 'resourc':46 'respons':229 'return':153,182,209 'schema':196 'scheme':137 'second':144 'servic':74 'settl':86 'site':169 'span':65 'specif':45,157,186 'substant':217 'suggest':179 'timeout':145 'trade':187 'trade data API' 'transact':189 'unclear':162 'unit':116 'unknown':232 'usdc':15,30,88,118,127 'usdc-settlement' 'util':73 'via':10,25,39,134 'wallet':213 'without':219 'x402':11,26,41,103 'x402 API' 'x402-payment'","prices":[{"id":"06aaf841-0eef-463f-b655-5e3d521603b4","listingId":"6326f656-2db9-4a6e-902d-f78d689d8c63","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/trades/116","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:24.326Z"}],"sources":[{"listingId":"6326f656-2db9-4a6e-902d-f78d689d8c63","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/116","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:24.326Z","lastSeenAt":"2026-04-26T11:04:13.740Z"}],"details":{"listingId":"6326f656-2db9-4a6e-902d-f78d689d8c63","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/116 \\\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":"Platform pricing is $0.02 per request with no API keys, rate limits, or minimums","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge shows maxAmountRequired of 20000 base units of USDC on Base network with exact scheme","source_url":"https://lowpaymentfee.com/api/v1/trades/116"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/116"},{"claim":"Platform offers endpoints across data analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching trade or transaction data on a per-call payment basis","Integrating pay-per-use API access into agent workflows without API key management","Accessing financial or trade information settled via USDC on Base"],"bestFor":["Agents needing keyless, pay-per-call API access","Developers wanting low-friction crypto-settled data endpoints","Use cases requiring no subscription or rate-limit constraints"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume batch processing where per-call pricing adds up","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:46.927Z"},"updatedAt":"2026-04-26T11:04:13.740Z"}}