{"id":"173cc64e-209e-4fda-9252-5ced03163942","shortId":"ukQfNG","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific path `/api/v1/trades/56` suggests a trade-related data endpoint, though the exact response payload is not documented. The provider operates a broader platform offering multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities—all priced at $0.02 per request.\n\nPayment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge confirms the endpoint is live and accepts POST requests with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). No API keys or rate limits are required; access is granted immediately upon payment. The timeout for payment settlement is 300 seconds.\n\nDocumentation is extremely sparse—the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of what data the `/api/v1/trades/56` endpoint actually returns. The endpoint is confirmed live via the 402 challenge, but the lack of documentation makes it difficult to assess the actual utility of the response.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["finance","data"],"synonyms":["trade data API","x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No documentation available—docs/pricing/README pages only show 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","Unclear what data /api/v1/trades/56 actually returns","No examples of successful responses available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/56","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/56","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 402 challenge, but there is no documentation, no OpenAPI schema, no example request/response, and no explanation of what the /api/v1/trades/56 endpoint actually returns. Pricing is clear but everything else is a 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'/request':16,34 '0.02':15,33,93,129 '000':125 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':106 '20':124 '300':155 '402':207 '6':133 'Base network API' 'USDC micropayment API' 'accept':116 'access':7,25,44,143 'actual':198,220 'addit':177 'ai':82 'amount':122 'analyt':81 'api':6,24,43,77,136,163 'assess':218 'base':9,27,101,126 'base-network' 'broader':73 'call':4,22 'categori':78 'challeng':109,208 'confirm':110,203 'connect':172 'contract':105 'data':59,80,194 'decim':134 'descript':191 'detail':179 'difficult':216 'doc':162 'document':68,157,213 'endpoint':38,60,112,197,201 'exact':63 'exampl':186 'extrem':159 'financ':85 'given':130 'grant':145 'i.e':128 'immedi':146 'includ':79 'infrastructur':88 'key':137 'lack':211 'learn':84 'limit':140 'live':114,204 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':83 'make':214 'maximum':121 'multipl':76 'network':10,28,102 'no-api-key' 'offer':75 'openapi':183 'oper':71 'page':167 'path':52 'pay':2,20 'pay-per-cal':1,19 'pay-per-call API' 'pay-per-request' 'payload':65,188 'payment':48,96,148,152 'per':3,21,94 'platform':74 'post':117 'post-method' 'premium':5,23,42 'price':91,164 'prompt':174 'protocol':13,31,49 'provid':41,70 'rate':139 'readm':166 'relat':58 'render':169 'request':95,118 'request/response':187 'requir':142 'respons':64,224 'return':199 'schema':184 'second':156 'settl':98 'settlement':153 'spars':160 'specif':51 'suggest':54 'technic':178 'though':61 'timeout':150 'trade':57 'trade data API' 'trade-rel':56 'unit':127 'upon':147 'usdc':18,36,104,131 'usdc-settlement' 'use':103 'util':89,221 'via':11,29,45,205 'wallet':173 'web3':86 'x402':12,30,47,108 'x402 API' 'x402-payment'","prices":[{"id":"1ac0d4f4-8b7e-4105-809d-62183ff07d6b","listingId":"173cc64e-209e-4fda-9252-5ced03163942","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/56","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:09.433Z"}],"sources":[{"listingId":"173cc64e-209e-4fda-9252-5ced03163942","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/56","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:09.433Z","lastSeenAt":"2026-04-26T01:02:58.451Z"}],"details":{"listingId":"173cc64e-209e-4fda-9252-5ced03163942","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/56 \\\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":"Endpoint returns 402 with x402 challenge accepting USDC on Base network at maxAmountRequired 20000 (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/trades/56"},{"claim":"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 is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/56"}],"useCases":["Accessing trade-related data without subscription or API key management","Programmatic pay-per-call access for agents settling in USDC on Base","Integrating low-cost data endpoints into automated workflows"],"bestFor":["Agents or bots that need keyless, on-demand API access","Developers wanting to avoid subscription commitments for occasional API calls","x402-compatible clients on the Base network"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.846Z"},"updatedAt":"2026-04-26T01:02:58.451Z"}}