{"id":"5a730af2-11ee-4664-ad57-372c4d45453b","shortId":"kp22wV","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/98` appears to be part of a broader platform offering dozens of pay-per-call API 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 POST requests and returns JSON. Payment is settled on-chain via USDC (contract 0x8335…2913) on Base to the payee address 0x1A2B…85F3. The x402 challenge specifies a maxAmountRequired of 20,000 base units, which at 6 decimals for USDC equals $0.02. No API keys, rate limits, or upfront commitments are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nHowever, the specific functionality behind `/api/v1/trades/98` is unclear. The path suggests a trade-related resource (possibly retrieving or executing a trade with ID 98), but no documentation, request schema, or response schema is available for this particular endpoint. The broader site lists categories like finance/crypto endpoints but does not explicitly list a `/trades/` route. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["finance","data"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","crypto payment API","trade data API"],"warnings":["No documentation available for /api/v1/trades/98 — purpose and expected input/output are unknown","The /trades/ path is not listed among the site's advertised API categories, raising questions about what this endpoint actually does","All docs/pricing/API pages render only 'Connect wallet' with no further content","No OpenAPI spec or request/response schemas available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/98","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/98","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), but there is no documentation for the /trades/98 endpoint specifically — no request schema, no response schema, no examples. The docs pages are empty beyond a wallet-connect prompt. The purpose of this specific endpoint is 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'/trades':216 '0.02':10,28,88,138 '000':128 '0x1a2b':118 '0x8335':110 '20':127 '2913':111 '6':133 '85f3':119 '98':187 'Base network API' 'USDC micropayment API' 'accept':95 'access':6,24,44 'address':117 'advertis':148 'ai/ml':78 'analyt':77 'api':5,16,23,34,43,73,140,222 'appear':58 'attach':151 'avail':197 'base':8,26,52,113,129 'base-network' 'behind':167 'broader':64,203 'call':72 'caller':149 'categori':206 'chain':106 'challeng':122 'commit':146 'connect':228 'content':234 'contract':109 'crypto payment API' 'data':76,81 'decim':134 'doc':219 'document':190 'dozen':67 'endpoint':38,74,94,201,209 'equal':137 'execut':182 'explicit':213 'finance/crypto':208 'finance/web3':80 'function':166 'gate':3,21 'header':156 'howev':163 'id':186 'infer':79 'infrastructur':83 'json':100 'json-response' 'key':17,35,141 'like':207 'limit':143 'list':205,214 'lowpaymentfee' 'lowpaymentfee.com':40 'maxamountrequir':125 'network':53 'no-api-key' 'offer':66 'on-chain':104 'page':223 'part':61 'particular':200 'path':172 'pay':9,27,70 'pay-per-cal':69 'pay-per-call API' 'pay-per-request' 'paye':116 'payment':48,101,155,161 'per':11,29,71,89 'platform':65 'possibl':179 'post':96 'post-method' 'premium':4,22,42 'price':86,220 'prompt':230 'proof':162 'protocol':49 'provid':41 'rate':142 'relat':177 'render':225 'request':12,30,90,97,191 'requir':18,36 'resourc':56,178 'respons':194 'retriev':180 'return':99 'rout':217 'schema':192,195 'settl':103 'simpli':150 'site':204 'span':75 'specif':55,165 'specifi':123 'suggest':173 'trade':176,184 'trade data API' 'trade-rel':175 'unclear':170 'unit':130 'upfront':145 'usdc':14,32,92,108,136 'usdc-settlement' 'util':84 'valid':159 'via':45,107 'wallet':229 'x':154 'x-payment':153 'x402':2,20,47,121,160 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"6126938e-f521-4b08-b678-5f191b77d031","listingId":"5a730af2-11ee-4664-ad57-372c4d45453b","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/98","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:58:12.521Z"}],"sources":[{"listingId":"5a730af2-11ee-4664-ad57-372c4d45453b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/98","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:58:12.521Z","lastSeenAt":"2026-04-25T23:32:43.483Z"}],"details":{"listingId":"5a730af2-11ee-4664-ad57-372c4d45453b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/98 \\\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 x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/trades/98"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/trades/98"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The site advertises categories: Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing trade-related data or executing trades via a single paid API call","Integrating pay-per-request APIs into agent workflows without managing API keys","Programmatic access to financial or data endpoints settled in USDC on Base"],"bestFor":["Agents or developers who want keyless, pay-per-call API access","Use cases requiring on-chain payment settlement on Base","Low-volume or sporadic API consumers who prefer no subscriptions"],"notFor":["Users who need detailed documentation or well-defined request/response schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:44.66Z"},"updatedAt":"2026-04-25T23:32:43.483Z"}}