{"id":"be3914dd-c1c3-4bb1-bf8b-0b1a9eab49d2","shortId":"KBtM5N","kind":"x402","title":"Pay-per-call token data for CRV via x402 on Base, settled in USDC at $0.02/request.","tagline":"Pay-per-call token data for CRV via x402 on Base, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides token data for CRV (Curve DAO Token) through a pay-per-request x402 protocol. Payment is settled in USDC on the Base network at $0.02 per call (maxAmountRequired of 20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe endpoint is part of a broader platform offering dozens of APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced uniformly at $0.02 per request. The specific `/api/v1/tokens/CRV` path sits within the Finance & Web3 category and likely returns token-level data such as price, market cap, or related metadata for the CRV token, though the exact response schema is not documented.\n\nThe x402 challenge was successfully captured with version 1, confirming the endpoint is live. The payment asset is USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base). The endpoint accepts POST requests and is marked as discoverable. Documentation beyond the landing page is essentially empty (all sub-pages just show \"Connect wallet\"), so the exact request body format and response structure remain unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","token-data","crv-token","pay-per-request","no-api-key","crypto-market-data"],"categories":["finance","crypto"],"synonyms":["CRV token data","Curve DAO Token API","crypto token price","CRV market data","x402 token endpoint","pay-per-call crypto API","Base USDC API"],"warnings":["No request body schema documented — callers must guess or reverse-engineer the expected POST payload","No response schema or example response available","All documentation pages (/docs, /api, /pricing, /README) are empty beyond a 'Connect wallet' prompt","The exact data returned for CRV tokens is unknown — could be price, metadata, or something else","Platform appears to be early-stage with minimal documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/tokens/CRV","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/tokens/CRV","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 USDC on Base), but there is no documentation of request body format, response schema, or examples. All doc/pricing/API pages return only 'Connect wallet' with no useful content. The endpoint's exact functionality for CRV is inferred from the URL pattern and site landing 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'/request':18,36 '0.02':17,35,67,126 '000':73 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':186 '1':174 '20':72 '6':77 'Base USDC API' 'CRV market data' 'CRV token data' 'Curve DAO Token API' 'accept':191 'across':113 'ai/ml':116 'analyt':115 'api':80,112 'asset':182 'attach':89 'base':12,30,64,74,188 'base-network' 'beyond':200 'bodi':219 'broader':107 'call':4,22,69 'caller':87 'cap':150 'captur':171 'categori':138 'challeng':168 'confirm':175 'connect':213 'contract':185 'crv':8,26,45,156 'crv-token' 'crypto token price' 'crypto-market-data' 'curv':46 'dao':47 'data':6,24,43,114,145 'decim':78 'discover':198 'document':165,199 'dozen':110 'empti':206 'endpoint':38,102,177,190 'essenti':205 'exact':160,217 'financ':136 'finance/web3':118 'format':220 'header':94 'infer':117 'infrastructur':120 'key':81 'land':202 'level':144 'like':140 'limit':84 'live':179 'lowpaymentfee.com':40 'mark':196 'market':149 'maxamountrequir':70 'metadata':153 'network':65 'no-api-key' 'offer':109 'page':203,210 'part':104 'path':132 'pay':2,20,52 'pay-per-cal':1,19 'pay-per-call crypto API' 'pay-per-request':51 'payment':57,93,99,181 'per':3,21,53,68,127 'platform':108 'post':192 'price':123,148 'proof':100 'protocol':56 'provid':41 'rate':83 'relat':152 'remain':224 'request':54,128,193,218 'requir':86 'respons':161,222 'return':141 'schema':162 'settl':13,31,59 'show':212 'simpli':88 'sit':133 'specif':130 'structur':223 'sub':209 'sub-pag':208 'success':170 'though':158 'token':5,23,42,48,143,157 'token-data' 'token-level':142 'uniform':124 'unit':75 'unknown':225 'usdc':15,33,61,184 'usdc-settlement' 'util':121 'valid':97 'version':173 'via':9,27 'wallet':214 'web3':137 'within':134 'x':92 'x-payment':91 'x402':10,28,55,98,167 'x402 token endpoint' 'x402-payment'","prices":[{"id":"81eff7bf-5060-45b7-88fd-81419cc92923","listingId":"be3914dd-c1c3-4bb1-bf8b-0b1a9eab49d2","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/tokens/CRV","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:33:12.702Z"}],"sources":[{"listingId":"be3914dd-c1c3-4bb1-bf8b-0b1a9eab49d2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/tokens/CRV","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:12.702Z","lastSeenAt":"2026-04-23T20:01:25.569Z"}],"details":{"listingId":"be3914dd-c1c3-4bb1-bf8b-0b1a9eab49d2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/tokens/CRV \\\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":"Endpoint returns 402 with x402 version 1 challenge, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/tokens/CRV"},{"claim":"Price is $0.02 per request (maxAmountRequired 20000 base units USDC, 6 decimals)","source_url":"https://lowpaymentfee.com"},{"claim":"Payment asset is USDC on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)","source_url":"https://lowpaymentfee.com/api/v1/tokens/CRV"},{"claim":"No API keys, no rate limits, instant access advertised","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching current CRV token data (price, metadata) for trading bots or dashboards","Integrating CRV market information into DeFi applications without managing API keys","Agent-driven portfolio monitoring that pays per request with USDC on Base"],"bestFor":["Developers needing quick, keyless access to CRV token data","AI agents that can settle micropayments via x402 on Base","Applications requiring on-demand crypto data without subscription commitments"],"notFor":["High-frequency trading requiring sub-millisecond latency (no SLA documented)","Users who need detailed historical CRV data or OHLCV candles (response schema unknown)","Non-crypto use cases unrelated to token data"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:46:38.885Z"},"updatedAt":"2026-04-23T20:01:25.569Z"}}