{"id":"f6bb45c8-6ab5-425f-b984-c06146d9fc63","shortId":"7nQb8L","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol, settling on the Base network in USDC. The specific resource `/api/v1/trades/83` appears to be part of a broader platform offering data & analytics, AI/ML inference, finance/Web3 data, and infrastructure utility endpoints — all gated behind per-request micropayments at $0.02 each.\n\nThe endpoint accepts POST requests and returns application/json responses. Payment is handled via the x402 exact scheme: callers attach an X-PAYMENT header with a signed USDC payment of up to 20,000 base units (i.e., $0.02, since USDC uses 6 decimals) to the payTo address on Base. No API keys, rate limits, or subscriptions are required — each call is independently paid.\n\nThe specific functionality behind `/api/v1/trades/83` is not documented in the crawled material. The path suggests it may return trade-related data (possibly a specific trade record with ID 83), but this is speculative. The broader platform lists endpoints for metrics, reports, 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 beyond the landing page returned only a \"Connect wallet\" prompt with no further technical detail.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","json-response","post-method"],"categories":["finance","data"],"synonyms":["trades API","x402 API","micropayment API","pay-per-call API","USDC API","Base network API","lowpaymentfee"],"warnings":["No documentation available for /api/v1/trades/83 — purpose and response format are unknown","No OpenAPI or request/response schema provided","All documentation pages beyond the landing page returned only 'Connect wallet' with no content","The specific trade endpoint (ID 83) may be a static resource rather than a general-purpose API"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/83","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/83","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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation for the /api/v1/trades/83 resource specifically — no request schema, no response schema, no examples. The docs, pricing, and README pages all returned only 'Connect wallet' with no technical content. The purpose of this specific endpoint is 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'0.02':10,24,80,119,210 '000':115 '20':114 '6':123 '83':174 'Base network API' 'USDC API' 'accept':84 'access':6,20,36 'address':128 'ai/ml':64 'analysi':188 'analyt':63 'api':5,19,35,132 'appear':53 'application/json':89 'attach':100 'base':8,22,45,116,130 'base-network' 'behind':74,148 'beyond':215 'broader':59,180 'call':141 'caller':99 'classif':191 'connect':222 'convers':203 'crawl':155 'data':62,67,166 'decim':124 'detail':229 'document':152,213 'embed':192 'endpoint':30,71,83,183 'estim':200 'exact':97 'exchang':195 'feed':194 'finance/web3':66 'function':147 'gas':199 'gate':3,17,73 'generat':205 'geocod':201 'handl':93 'header':105 'i.e':118 'id':173 'independ':143 'infer':65 'infrastructur':69 'json-response' 'key':133 'land':217 'limit':135 'list':182 'lowpaymentfee' 'lowpaymentfee.com':32 'materi':156 'may':161 'metric':185 'micropay':78 'micropayment API' 'network':46 'no-api-key' 'offer':61 'page':214,218 'paid':144 'part':56 'path':158 'pay':9,23 'pay-per-call API' 'payment':40,91,104,110 'payto':127 'per':11,25,76 'per-request':75 'per-request-billing' 'platform':60,181 'point':212 'possibl':167 'post':85 'post-method' 'premium':4,18,34 'price':193,211 'prompt':224 'protocol':41 'provid':33 'quot':198 'rate':134,196 'record':171 'relat':165 'report':186 'request':12,26,77,86 'requir':139 'resourc':51 'respons':90 'return':88,162,219 'scheme':98 'sentiment':187 'settl':42 'sign':108 'sinc':120 'specif':50,146,169 'specul':178 'subscript':137 'suggest':159 'summar':190 'technic':228 'text':189 'token':197 'trade':164,170 'trade-rel':163 'trades API' 'unit':117 'usdc':14,28,48,109,121 'usdc-micropayment' 'use':122 'util':70 'valid':202 'via':37,94 'wallet':223 'x':103 'x-payment':102 'x402':2,16,39,96 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"4b70826e-d2e3-403d-a2cc-6d4085fd64dc","listingId":"f6bb45c8-6ab5-425f-b984-c06146d9fc63","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/83","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:04.074Z"}],"sources":[{"listingId":"f6bb45c8-6ab5-425f-b984-c06146d9fc63","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/83","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:04.074Z","lastSeenAt":"2026-04-26T02:03:12.246Z"}],"details":{"listingId":"f6bb45c8-6ab5-425f-b984-c06146d9fc63","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/83 \\\n  -H \"X-PAYMENT: <signed-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 on POST, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/trades/83"},{"claim":"Payment is 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/trades/83"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access on 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":["Fetching trade data on a per-request payment basis without subscriptions","Integrating pay-per-call data access into autonomous agents","Accessing premium API resources using on-chain USDC micropayments"],"bestFor":["Agents or developers who want keyless, pay-per-use API access","On-chain payment workflows on Base using USDC","Low-commitment data retrieval without rate limits or subscriptions"],"notFor":["Users needing detailed API documentation or OpenAPI schemas before integrating","High-volume consumers who prefer flat-rate or subscription pricing","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.046Z"},"updatedAt":"2026-04-26T02:03:12.246Z"}}