{"id":"414a140e-1ba7-4854-86f8-817f700b05f7","shortId":"qMYfhR","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. The specific resource `/api/v1/trades/197` 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 USDC micropayments on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled in USDC (contract 0x8335…2913 on Base) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The platform advertises a flat $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments. The payment timeout is 300 seconds.\n\nHowever, the specific functionality of `/api/v1/trades/197` is unclear. The path suggests a trade-related resource (possibly retrieving or executing a trade with ID 197), but no documentation, request schema, or response schema is available for this particular endpoint. The broader site lists categories like finance/prices, crypto/quotes, and crypto/gas, so this trades endpoint may relate to financial or crypto trade data. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","post-endpoint","json-response"],"categories":["finance","data"],"synonyms":["trades API","x402 API","micropayment API","pay-per-request API","USDC API","Base network API","lowpaymentfee","crypto trades endpoint"],"warnings":["No documentation available for /api/v1/trades/197 — purpose and expected request/response are unknown","All doc/pricing/API/README pages returned only 'Connect wallet' with no content","The endpoint path includes a numeric ID (197) suggesting a specific resource, but no context is provided for what trades are or how IDs are assigned","No OpenAPI spec or output schema beyond basic HTTP method info"],"endpointUrl":"https://lowpaymentfee.com/api/v1/trades/197","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/197","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 specific /trades/197 resource — no request schema, no response schema, no examples. The docs pages are empty. The purpose of this particular endpoint is 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'/request':129 '0.02':10,28,118,128 '000':113 '0x8335':103 '197':175 '20':112 '2913':104 '300':149 '6':121 'Base network API' 'USDC API' 'accept':94 'access':6,24,44 'across':131 'advertis':125 'ai/ml':65 'amount':110 'analyt':64 'api':5,16,23,34,43,136,214 'appear':54 'avail':185 'base':8,26,83,106,114 'base-network' 'behind':75 'broader':60,191 'categori':194 'challeng':87 'commit':144 'confirm':88 'connect':223 'content':229 'contract':102 'crypto':209 'crypto trades endpoint' 'crypto/gas':199 'crypto/quotes':197 'data':63,68,211 'decim':122 'doc':213 'document':178 'endpoint':38,72,90,133,189,203 'equal':117 'execut':170 'finance/prices':196 'finance/web3':67 'financi':207 'flat':127 'function':154 'gate':3,21,74 'howev':151 'id':174 'infer':66 'infrastructur':70 'json-response' 'key':17,35,137 'like':195 'limit':140 'list':193 'live':92 'lowpaymentfee' 'lowpaymentfee.com':40 'maximum':109 'may':204 'micropay':80 'micropayment API' 'minimum':143 'network':84 'no-api-key' 'offer':62 'page':218 'part':57 'particular':188 'path':160 'pay':9,27 'pay-per-request API' 'payment':48,97,146 'per':11,29,77 'per-request':76 'per-request-billing' 'platform':61,124 'possibl':167 'post':95 'post-endpoint' 'premium':4,22,42 'price':130,215 'prompt':225 'protocol':49 'provid':41 'rate':139 'readm':217 'relat':165,205 'request':12,30,78,96,179 'requir':18,36 'resourc':52,166 'respons':182 'retriev':168 'return':220 'schema':180,183 'second':150 'settl':99 'site':192 'specif':51,153 'substant':228 'suggest':161 'timeout':147 'trade':164,172,202,210 'trade-rel':163 'trades API' 'unclear':158 'unit':115 'usdc':14,32,79,101,119 'usdc-micropayment' 'use':120 'util':71 'via':45 'wallet':224 'x402':2,20,47,86 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"fd7bdfbf-9f9c-44c3-8029-cc2790d002c6","listingId":"414a140e-1ba7-4854-86f8-817f700b05f7","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/197","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:57:46.188Z"}],"sources":[{"listingId":"414a140e-1ba7-4854-86f8-817f700b05f7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/trades/197","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:57:46.188Z","lastSeenAt":"2026-04-26T05:32:45.843Z"}],"details":{"listingId":"414a140e-1ba7-4854-86f8-817f700b05f7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/trades/197 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","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/197"},{"claim":"Platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/trades/197"}],"useCases":["Fetching trade-related data with per-request USDC micropayments","Integrating pay-as-you-go API access into agent workflows without managing API keys","Accessing financial or crypto trade information via x402 protocol"],"bestFor":["Agents or developers wanting keyless, pay-per-call API access","x402-compatible wallets and clients on Base","Low-volume or sporadic API consumers who prefer no subscriptions"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:45.916Z"},"updatedAt":"2026-04-26T05:32:45.843Z"}}