{"id":"08844d12-6167-4375-8f4a-112b2082b42e","shortId":"fHeqTc","kind":"x402","title":"Curve Finance pool data via x402 micropayment on Base — $0.02 per request in USDC.","tagline":"Curve Finance pool data via x402 micropayment on Base — $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to Curve Finance DeFi pool data through the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which covers data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/defi/curve/pools` accepts POST requests and returns JSON. Based on the x402 challenge, the maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme with no API keys, no rate limits, and no upfront commitments — callers attach an X-PAYMENT header to each request.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the Curve pools response contains. The endpoint is confirmed live (402 challenge captured), but without documentation it is difficult to know the exact request parameters or response shape.","tags":[],"capabilities":["defi-data","curve-finance-pools","x402-payment","usdc-base","per-request-micropayment","json-api"],"categories":["defi","finance"],"synonyms":["Curve pools API","Curve Finance pool data","DeFi pool info","Curve liquidity pools","crypto pool data","x402 DeFi API"],"warnings":["No API documentation available — docs, API, pricing, and README pages all show only a 'Connect wallet' prompt with no content.","No OpenAPI or JSON schema describing request parameters or response fields.","The endpoint name suggests Curve Finance pool data but no details confirm what fields are returned.","No request or response examples available anywhere in the crawled material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/curve/pools","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/defi/curve/pools","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages returned only a wallet-connect prompt. The specific data returned by the Curve pools endpoint is entirely 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'0.02':10,24,70,112 '000':101 '0x8335':106 '20':100 '2913':107 '402':194 '6':116 'Curve Finance pool data' 'Curve liquidity pools' 'Curve pools API' 'DeFi pool info' 'accept':84 'access':34 'ai/ml':61 'amount':97 'analyt':60 'api':128,154 'attach':138 'base':9,23,78,90,102,109 'caller':137 'captur':196 'challeng':94,195 'commit':136 'confirm':192 'connect':163 'contain':188 'content':169 'cover':58 'crawl':152 'crypto pool data' 'curv':1,15,36,185 'curve-finance-pools' 'data':4,18,40,59 'decim':117 'defi':38 'defi-data' 'descript':180 'difficult':202 'doc':153 'document':147,199 'endpoint':30,51,82,190 'equal':111 'exact':124,206 'exampl':177 'extrem':149 'field':183 'financ':2,16,37 'finance/web3':63 'given':113 'header':143 'infer':62 'infrastructur':65 'json':89 'json-api' 'key':129 'know':204 'limit':132 'live':193 'lowpaymentfee.com':32,55 'made':120 'mani':50 'maximum':96 'micropay':7,21 'network':79 'offer':52 'one':48 'openapi':173 'page':158 'paramet':208 'payment':44,118,142 'per':11,25,71 'per-request-micropayment' 'platform':56 'pool':3,17,39,186 'post':85 'price':68,155 'prompt':165 'protocol':45 'provid':33 'rate':131 'readm':157 'request':12,26,72,86,146,207 'request/response':176 'requir':98 'respons':187,210 'return':88,160 'schema':174 'scheme':125 'settl':73 'shape':211 'spars':150 'specif':81 'unit':103 'upfront':135 'usdc':14,28,75,105,114 'usdc-base' 'util':66 'via':5,19,121 'wallet':164 'without':198 'x':141 'x-payment':140 'x402':6,20,43,93,123 'x402 DeFi API' 'x402-payment'","prices":[{"id":"22491369-a7e7-4136-abd0-9d1a399e2f57","listingId":"08844d12-6167-4375-8f4a-112b2082b42e","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/defi/curve/pools","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-19T12:29:48.727Z"}],"sources":[{"listingId":"08844d12-6167-4375-8f4a-112b2082b42e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/curve/pools","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T12:29:48.727Z","lastSeenAt":"2026-04-22T02:31:47.469Z"}],"details":{"listingId":"08844d12-6167-4375-8f4a-112b2082b42e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/curve/pools \\\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 endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/curve/pools"},{"claim":"All endpoints on lowpaymentfee.com are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/curve/pools"}],"useCases":["Fetching current Curve Finance pool information for DeFi dashboards","Programmatic monitoring of Curve pool metrics for trading bots","Aggregating DeFi pool data across protocols"],"bestFor":["Agents or bots needing on-demand Curve pool data without API key management","Developers building DeFi aggregators who want pay-per-call pricing","Quick one-off lookups of Curve pool state via micropayment"],"notFor":["High-frequency bulk data ingestion where per-call fees add up quickly","Users who need detailed API documentation and response schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:23.451Z"},"updatedAt":"2026-04-22T02:31:47.469Z"}}