{"id":"f4991d12-2227-4bc2-a13d-07bb5733889b","shortId":"aFQudr","kind":"x402","title":"Pay-per-call trade data endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call trade data endpoint on Base via x402, settling in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides premium API access to trade data (specifically the resource at /api/v1/trades/123). It uses the x402 payment protocol on the Base network, accepting USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) for per-request micropayments.\n\nThe endpoint is live and returns a 402 challenge with a maxAmountRequired of 20000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site's advertised flat pricing of $0.02/request across all endpoints. The provider advertises no API keys, no rate limits, and instant access.\n\nThe broader lowpaymentfee.com platform offers multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities — all at the same $0.02/call price point. However, documentation is extremely sparse: the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available for this specific trades endpoint.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-micropayment","trade-data","json-response"],"categories":["finance","data"],"synonyms":["trade data API","x402 micropayment API","USDC pay-per-call","Base network API","crypto trade endpoint","lowpaymentfee"],"warnings":["No API documentation available — docs/pricing/README pages only show 'Connect wallet'","No OpenAPI or schema describing request parameters or response format for this endpoint","The specific trade endpoint /api/v1/trades/123 is not listed on the provider's homepage among their advertised APIs","Cannot verify what data this endpoint actually returns without making a paid request"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/123","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/123","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, no request/response schema, no examples, and no OpenAPI spec. The specific functionality of /api/v1/trades/123 is undocumented beyond the generic label 'Premium API 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'/call':147 '/request':17,34,107 '0.02':16,33,94,106,146 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':64 '20000':83 '402':77 '6':89 'Base network API' 'USDC pay-per-call' 'accept':61 'access':42,122 'across':108 'advertis':102,113 'ai':134 'analyt':133 'api':41,115,129,157 'avail':187 'base':9,26,59,84 'base-network' 'broader':124 'call':4,21 'categori':130 'challeng':78 'connect':166 'consist':97 'contract':63 'crypto trade endpoint' 'data':6,23,45,132 'decim':90 'detail':173 'doc':156 'document':151,182 'endpoint':7,24,36,71,110,192 'exampl':185 'extrem':153 'financ':137 'flat':103 'howev':150 'includ':131 'infrastructur':140 'instant':121 'json-response' 'key':116 'learn':136 'limit':119 'live':73 'lowpaymentfee' 'lowpaymentfee.com':38,125 'machin':135 'maxamountrequir':81 'micropay':69 'multipl':128 'network':60 'offer':127 'openapi':177 'page':161 'pay':2,19 'pay-per-cal':1,18 'payload':186 'payment':55 'per':3,20,67,95 'per-request':66 'per-request-micropayment' 'platform':126 'point':149 'premium':40 'price':104,148,158 'prompt':168 'protocol':56 'provid':39,112 'rate':118 'readm':160 'render':163 'request':68,96 'request/response':180 'resourc':48 'return':75 'schema':181 'settl':12,29 'sinc':86 'site':100 'spars':154 'spec':178 'specif':46,190 'technic':172 'trade':5,22,44,191 'trade data API' 'trade-data' 'translat':92 'unit':85 'usdc':14,31,62,87 'usdc-settlement' 'use':52,88 'util':141 'via':10,27 'wallet':167 'web3':138 'x402':11,28,54 'x402 micropayment API' 'x402-payment'","prices":[{"id":"b19a189f-684f-4851-a324-f6989c3fbed3","listingId":"f4991d12-2227-4bc2-a13d-07bb5733889b","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/123","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:25.514Z"}],"sources":[{"listingId":"f4991d12-2227-4bc2-a13d-07bb5733889b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/123","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:25.514Z","lastSeenAt":"2026-04-26T11:04:13.774Z"}],"details":{"listingId":"f4991d12-2227-4bc2-a13d-07bb5733889b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/123 \\\n  -H \"X-PAYMENT: <x402_payment_header>\" \\\n  -H \"Content-Type: application/json\"","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","source_url":"https://lowpaymentfee.com/api/v1/trades/123"},{"claim":"Provider advertises $0.02/request flat pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/123"}],"useCases":["Fetching trade data for a specific trade ID with per-call payment","Integrating pay-per-use trade information into automated agents","Accessing financial trade records without API key registration"],"bestFor":["Agents needing on-demand trade data without subscription commitments","Developers testing x402 payment flows on Base","Low-volume consumers who prefer pay-per-call over monthly plans"],"notFor":["High-volume consumers needing bulk trade data at discounted rates","Users who need detailed API documentation or SDKs before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:46.87Z"},"updatedAt":"2026-04-26T11:04:13.774Z"}}