{"id":"34eb8929-eb63-4a12-bb0e-58e0351b1c49","shortId":"9UpRVG","kind":"x402","title":"DeFi liquidity data for CFX via x402 micropayment on Base, $0.02 per request.","tagline":"DeFi liquidity data for CFX via x402 micropayment on Base, $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides DeFi liquidity data for CFX (Conflux) tokens, accessible via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of $0.02 per request (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 (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced at $0.02 per request on the Base network. The specific endpoint `/api/v1/defi/CFX/liquidity` falls under the Finance & Web3 category and presumably returns liquidity pool or market depth information for the CFX token, though the exact response schema is not documented.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation means callers must experiment to discover the expected request body and response format.","tags":[],"capabilities":["defi-liquidity-data","cfx-token","x402-payment","base-network","usdc-settlement","pay-per-request","no-api-key","json-response"],"categories":["defi","finance"],"synonyms":["CFX liquidity","Conflux liquidity pool","DeFi liquidity API","token liquidity data","CFX market depth","crypto liquidity endpoint"],"warnings":["No API documentation available — docs, pricing, and README pages all show only a 'Connect wallet' prompt","No request body schema or response schema documented; callers must guess the expected input","The endpoint path suggests CFX/Conflux liquidity data but this is inferred from the URL only","The platform lists many endpoint categories but none appear to have public documentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/CFX/liquidity","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/CFX/liquidity","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 with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no usage examples, and all documentation pages returned only a wallet-connect prompt. The actual data returned is entirely 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'0.02':11,24,67,129 '000':71 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':62 '20':70 '402':211 '6':75 'CFX liquidity' 'CFX market depth' 'Conflux liquidity pool' 'DeFi liquidity API' 'accept':46 'access':39 'ai/ml':120 'analyt':119 'api':78,116,174 'attach':87 'avail':202 'base':10,23,57,72,134 'base-network' 'bodi':227 'broader':105 'call':115 'caller':85,219 'categori':145 'cfx':5,18,36,157 'cfx-token' 'challeng':212 'confirm':206 'conflux':37 'connect':183 'content':189 'contract':61 'cost':65 'crawl':172 'crypto liquidity endpoint' 'data':3,16,34,118 'decim':76 'defi':1,14,32 'defi-liquidity-data' 'depth':153 'discov':223 'doc':173 'document':166,167,217 'dozen':110 'endpoint':28,100,138,204 'exact':161 'exampl':201 'expect':225 'experi':221 'extrem':169 'fall':140 'financ':143 'finance/web3':122 'format':230 'header':92 'infer':121 'inform':154 'infrastructur':124 'json':51 'json-response' 'key':79 'lack':215 'limit':82 'liquid':2,15,33,149 'live':207 'lowpaymentfee.com':30,107 'market':152 'mean':218 'micropay':8,21 'must':220 'network':58,135 'no-api-key' 'offer':109 'openapi':193 'page':178 'part':102 'pay':113 'pay-per-cal':112 'pay-per-request' 'payment':43,52,91,97 'per':12,25,68,114,130 'platform':106 'pool':150 'post':47 'presum':147 'price':127,175 'prompt':185 'proof':98 'proper':210 'protocol':44 'provid':31 'rate':81 'readm':177 'request':13,26,48,69,131,226 'request/response':196 'requir':84 'respons':162,229 'return':50,148,180,208 'schema':163,197 'settl':54 'simpli':86 'span':117 'spars':170 'spec':194 'specif':137 'substant':188 'though':159 'token':38,158 'token liquidity data' 'unit':73 'usag':200 'usdc':60 'usdc-settlement' 'use':59 'util':125 'valid':95 'via':6,19,40 'wallet':184 'web3':144 'x':90 'x-payment':89 'x402':7,20,42,96 'x402-payment'","prices":[{"id":"19eae413-23dc-49db-a687-97a333a8fdfd","listingId":"34eb8929-eb63-4a12-bb0e-58e0351b1c49","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/CFX/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:33.320Z"}],"sources":[{"listingId":"34eb8929-eb63-4a12-bb0e-58e0351b1c49","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/CFX/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:33.320Z","lastSeenAt":"2026-04-23T02:00:20.037Z"}],"details":{"listingId":"34eb8929-eb63-4a12-bb0e-58e0351b1c49","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/CFX/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_proof>\" \\\n  -d '{}'","exampleRequest":{},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge on POST, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/defi/CFX/liquidity"},{"claim":"Payment is 20,000 base units of USDC (6 decimals = $0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/CFX/liquidity"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/CFX/liquidity"},{"claim":"Docs, API, pricing, and README pages returned only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying real-time liquidity data for CFX tokens across DeFi protocols","Building trading bots that need CFX liquidity depth before executing swaps","Monitoring CFX liquidity pool health for portfolio management dashboards"],"bestFor":["Agents needing on-demand DeFi liquidity data without API key signup","Developers building CFX-related trading or analytics tools","Micropayment-native workflows that settle on Base with USDC"],"notFor":["Users who need comprehensive multi-token liquidity aggregation in a single call","Anyone requiring detailed API documentation or guaranteed SLAs before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:59.318Z"},"updatedAt":"2026-04-23T02:00:20.037Z"}}