{"id":"2032d701-f801-48d5-90c8-aefd0b8eb4c8","shortId":"jDj78X","kind":"x402","title":"Pay-per-call premium API access on Base network via x402, $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402, $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific path `/api/v1/trades/28` appears to be one of many endpoints offered by this provider, though its exact functionality (likely related to trade data retrieval) is not explicitly documented beyond the generic \"Premium API Access\" label.\n\nThe provider operates a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities—all priced at $0.02 per request. Payment is settled in USDC (USD Coin) on the Base L2 network. The x402 challenge confirms the endpoint is live and accepts POST requests with a maximum payment of 20,000 base units of USDC (6 decimals), which equals $0.02.\n\nNo API keys or rate limits are advertised. Access is instant upon payment. However, documentation is extremely sparse—the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. The specific input/output schema for this trades endpoint is not documented, making it difficult to know what request body to send or what response to expect.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","no-api-key","no-rate-limit","trade-data"],"categories":["finance","data"],"synonyms":["trade data API","pay-per-call API","x402 endpoint","USDC micropayment API","Base network API","lowpaymentfee","crypto trade endpoint"],"warnings":["No documentation available for this specific endpoint's request/response format","All doc/pricing/API pages render only 'Connect wallet' with no content","The exact purpose of /api/v1/trades/28 is unclear—'Premium API Access' is a generic label","Cannot verify what data is returned without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/28","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/28","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of input/output schemas, no examples, and the specific purpose of /api/v1/trades/28 is undocumented. Docs pages are empty beyond a wallet connect 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'/request':14,30 '0.02':13,29,111,153 '000':144 '20':143 '6':149 'Base network API' 'USDC micropayment API' 'accept':135 'access':7,23,40,84,162 'advertis':161 'ai/ml':101 'analyt':100 'api':6,22,39,83,97,155,174 'appear':54 'base':9,25,48,123,145 'base-network' 'beyond':79 'bodi':208 'broad':90 'call':4,20 'catalog':91 'challeng':128 'coin':120 'confirm':129 'connect':183 'content':189 'crypto trade endpoint' 'data':73,99 'decim':150 'difficult':203 'doc':173 'document':78,168,200 'endpoint':34,60,131,197 'equal':152 'exact':67 'expect':215 'explicit':77 'extrem':170 'financ':103 'function':68 'generic':81 'howev':167 'infer':102 'infrastructur':106 'input/output':192 'instant':164 'key':156 'know':205 'l2':124 'label':85 'like':69 'limit':159 'live':133 'lowpaymentfee' 'lowpaymentfee.com':36 'make':201 'mani':59 'maximum':140 'network':10,26,49,125 'no-api-key' 'no-rate-limit' 'offer':61 'one':57 'oper':88 'page':178 'path':52 'pay':2,18,94 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':93 'payment':44,114,141,166 'per':3,19,95,112 'post':136 'premium':5,21,38,82 'price':109,175 'prompt':185 'protocol':45 'provid':37,64,87 'rate':158 'readm':177 'relat':70 'render':180 'request':96,113,137,207 'respons':213 'retriev':74 'schema':193 'send':210 'settl':116 'span':98 'spars':171 'specif':51,191 'substant':188 'though':65 'trade':72,196 'trade data API' 'trade-data' 'unit':146 'upon':165 'usd':119 'usdc':16,32,118,148 'usdc-settlement' 'util':107 'via':11,27,41 'wallet':184 'web3':104 'x402':12,28,43,127 'x402 endpoint' 'x402-payment'","prices":[{"id":"c713b8b4-b571-4c8c-8bc0-7cc44828969b","listingId":"2032d701-f801-48d5-90c8-aefd0b8eb4c8","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/28","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:55.080Z"}],"sources":[{"listingId":"2032d701-f801-48d5-90c8-aefd0b8eb4c8","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/28","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:55.080Z","lastSeenAt":"2026-04-26T03:03:00.036Z"}],"details":{"listingId":"2032d701-f801-48d5-90c8-aefd0b8eb4c8","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/28 \\\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 accepting USDC on Base network at 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/trades/28"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/28"}],"useCases":["Retrieving trade data without subscription commitments","Programmatic access to financial trade information with per-call billing","Agent-driven data fetching with automatic crypto micropayments"],"bestFor":["Developers wanting zero-commitment API access paid in USDC","AI agents that can settle x402 payments autonomously","Users who need occasional trade data without managing API keys"],"notFor":["High-volume consumers needing bulk pricing or batched requests","Users without USDC on Base network","Anyone requiring detailed API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.464Z"},"updatedAt":"2026-04-26T03:03:00.036Z"}}