{"id":"128b0a13-e523-406e-8818-6bec89280533","shortId":"9vSn2j","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific resource `/api/v1/trades/196` appears to be part of a broader platform offering dozens of pay-per-call endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request in USDC.\n\nThe endpoint accepts HTTP POST requests and returns `application/json` responses. Payment is settled on-chain via USDC (contract `0x8335…2913`) on Base, using the x402 \"exact\" scheme. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. There are no API keys, no rate limits, and no upfront commitments — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.\n\nThe specific functionality behind `/api/v1/trades/196` is not documented in the crawled material. The endpoint path suggests it may return data about a particular trade (ID 196), but this is speculative. The broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) returned only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","http-post"],"categories":["data","finance"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","trades endpoint","crypto payment API"],"warnings":["The specific functionality of /api/v1/trades/196 is undocumented — the path suggests trade data but this is unconfirmed.","All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no substantive content.","No request body schema or response schema is available for this endpoint.","The platform lists many endpoint categories but provides no detailed docs for any of them."],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/196","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/196","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 captured) and pricing is clear ($0.02 USDC on Base). However, there is no documentation for the specific /trades/196 resource, no request/response schema, no examples, and all doc pages returned only 'Connect wallet' with no content. The purpose of this specific endpoint is 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'/api/v1/trades/196':57,168 '/docs':233 '/pricing':234 '/readme':236 '0.02':10,28,87,137,228 '000':128 '0x8335':111 '196':189 '20':127 '2913':112 '6':133 'Base network API' 'USDC micropayment API' 'accept':94 'access':6,24,44 'ai/ml':77 'amount':122 'analysi':206 'analyt':76 'api':5,16,23,34,43,141 'appear':58 'application/json':100 'attach':152 'base':8,26,52,114,129 'base-network' 'behind':167 'broader':64,195 'call':72,125 'caller':150 'chain':107 'classif':209 'commit':149 'connect':240 'content':246 'contract':110 'convers':221 'crawl':174 'crypto payment API' 'data':75,80,183,202 'decim':134 'document':171,231 'dozen':67 'embed':210 'endpoint':38,73,93,177,198 'equal':136 'estim':218 'exact':118 'exchang':213 'export':203 'feed':212 'finance/web3':79 'function':166 'gas':217 'gate':3,21 'generat':223 'geocod':219 'header':157 'http':95 'http-post' 'id':188 'infer':78 'infrastructur':82 'insight':204 'json-response' 'key':17,35,142 'limit':145 'list':197 'lowpaymentfee' 'lowpaymentfee.com':40 'materi':175 'maximum':121 'may':181 'metric':200 'network':53 'no-api-key' 'offer':66 'on-chain':105 'page':232 'part':61 'particular':186 'path':178 'pay':9,27,70 'pay-per-cal':69 'pay-per-call API' 'pay-per-request' 'payment':48,102,156,162 'per':11,29,71,88,124 'platform':65,196 'point':230 'post':96 'premium':4,22,42 'price':85,211,229 'prompt':242 'proof':163 'protocol':49 'provid':41 'quot':216 'rate':144,214 'report':201 'request':12,30,89,97 'requir':18,36,123 'resourc':56 'respons':101 'return':99,182,237 'scheme':119 'sentiment':205 'settl':104 'simpli':151 'span':74 'specif':55,165 'specul':193 'substant':245 'suggest':179 'summar':208 'text':207 'token':215 'trade':187 'trades endpoint' 'unit':130 'upfront':148 'usdc':14,32,91,109,132 'usdc-settlement' 'use':115 'util':83 'valid':160,220 'via':45,108 'wallet':241 'x':155 'x-payment':154 'x402':2,20,47,117,161 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"56c3a56c-ae57-4782-90af-7748ec083b38","listingId":"128b0a13-e523-406e-8818-6bec89280533","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/196","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:49.131Z"}],"sources":[{"listingId":"128b0a13-e523-406e-8818-6bec89280533","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/196","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:49.131Z","lastSeenAt":"2026-04-26T05:32:45.981Z"}],"details":{"listingId":"128b0a13-e523-406e-8818-6bec89280533","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/196 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, requiring 20000 base units of USDC","source_url":"https://lowpaymentfee.com/api/v1/trades/196"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/196"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing trade data on a per-request payment basis without needing API keys","Integrating low-cost pay-per-call endpoints into agent workflows on Base","Programmatic access to premium data behind x402 micropayment gates"],"bestFor":["Agents or bots that need keyless, on-demand API access settled in USDC","Developers experimenting with x402 payment protocol integrations","Low-volume consumers who want per-request pricing with no commitments"],"notFor":["Users who need detailed API documentation or schemas before integrating","High-volume consumers who would benefit from bulk/subscription pricing"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.795Z"},"updatedAt":"2026-04-26T05:32:45.981Z"}}