{"id":"6d7e58f2-d46b-4e0a-be7a-6c00710f5ce3","shortId":"y23JuJ","kind":"x402","title":"Pay-per-call market quote for CVX token via x402 on Base, settled in USDC.","tagline":"Pay-per-call market quote for CVX token via x402 on Base, settled in USDC.","description":"This endpoint provides a market quote for the CVX (Convex Finance) token. It is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all gated via the x402 payment protocol on the Base network.\n\nThe specific endpoint `/api/v1/market/quote/CVX` accepts POST requests and returns JSON. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) at a maximum cost of $0.02 per request (20,000 base units with 6 decimals). The x402 challenge was captured live and confirms the endpoint is operational. No API keys or rate limits are advertised; access is granted purely through per-call micropayment.\n\nDocumentation beyond the landing page is extremely thin — the /docs, /api, /pricing, and /README pages all returned only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. The endpoint path suggests it returns a price quote for the CVX token, but the exact fields and format are unknown. The platform lists many other endpoints at the same $0.02 price point across finance, AI, and utility categories, but details on any of them are similarly sparse.","tags":[],"capabilities":["market-quote","crypto-token-price","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["finance","crypto"],"synonyms":["CVX price","Convex Finance quote","token quote","crypto market data","CVX market price","x402 crypto API"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All doc/pricing/README pages return only 'Connect wallet' with no content","No example responses or field descriptions for the market quote endpoint","Platform lists many diverse endpoints but provides no technical detail for any of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/market/quote/CVX","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/market/quote/CVX","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base), but there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages return only a wallet-connect prompt. The actual data returned by this endpoint is entirely 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'/api/v1/market/quote/cvx':86 '/docs':155 '/pricing':157 '/readme':159 '0.02':107,219 '000':111 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':99 '20':110 '6':115 'CVX market price' 'CVX price' 'Convex Finance quote' 'accept':87 'access':137 'across':222 'addit':170 'advertis':136 'ai':224 'ai/ml':66 'analyt':65 'api':62,130 'base':13,29,81,101,112 'base-network' 'beyond':147 'broad':55 'call':4,20,144 'captur':121 'categori':227 'challeng':119 'confirm':124 'connect':165 'contract':98 'convex':42 'cost':105 'crypto market data' 'crypto-token-price' 'cvx':8,24,41,200 'data':64 'decim':116 'descript':184 'detail':172,229 'document':146 'endpoint':34,85,126,190,215 'exact':204 'exampl':179 'extrem':152 'field':205 'financ':43,223 'finance/web3':68 'format':207 'gate':73 'grant':139 'infer':67 'infrastructur':70 'json':92 'key':131 'land':149 'limit':134 'list':212 'live':122 'lowpaymentfee.com':50 'mani':213 'market':5,21,37 'market-quote' 'maximum':104 'micropay':145 'network':82 'no-api-key' 'offer':53 'openapi':176 'oper':128 'page':150,160 'part':47 'path':191 'pay':2,18,59 'pay-per-cal':1,17 'pay-per-request':58 'payload':181 'payment':77,93 'per':3,19,60,108,143 'per-cal':142 'platform':51,211 'point':221 'post':88 'price':196,220 'prompt':167 'protocol':78 'provid':35 'pure':140 'quot':6,22,38,197 'rate':133 'request':61,89,109 'request/response':180 'respons':187 'return':91,162,194 'schema':188 'settl':14,30,95 'similar':235 'span':63 'spars':236 'spec':177 'specif':84 'suggest':192 'suit':56 'technic':171 'thin':153 'token':9,25,44,201 'token quote' 'unit':113 'unknown':209 'usdc':16,32,97 'usdc-settlement' 'util':71,226 'via':10,26,74 'wallet':166 'x402':11,27,76,118 'x402 crypto API' 'x402-payment'","prices":[{"id":"e50fab57-7e32-45dc-9b49-d0b9e3ba7d96","listingId":"6d7e58f2-d46b-4e0a-be7a-6c00710f5ce3","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/market/quote/CVX","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:47.149Z"}],"sources":[{"listingId":"6d7e58f2-d46b-4e0a-be7a-6c00710f5ce3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/market/quote/CVX","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:47.149Z","lastSeenAt":"2026-04-24T06:31:47.306Z"}],"details":{"listingId":"6d7e58f2-d46b-4e0a-be7a-6c00710f5ce3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/market/quote/CVX \\\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":"Endpoint returns 402 with x402 challenge advertising USDC payment on Base at maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/market/quote/CVX"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/market/quote/CVX"}],"useCases":["Fetching a real-time market quote for the CVX (Convex Finance) token","Integrating CVX price data into a trading bot or portfolio tracker","Agent-driven on-demand crypto price lookups without API key management"],"bestFor":["Agents or bots that need one-off CVX token price quotes","Developers wanting keyless, pay-per-call crypto market data on Base","Micropayment-gated access to token pricing without subscriptions"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users needing historical OHLCV or charting data (only a quote endpoint is exposed)","Anyone requiring detailed API documentation or response schema before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:40.752Z"},"updatedAt":"2026-04-24T06:31:47.306Z"}}