{"id":"0bd97658-090c-45f6-a4ce-d5e9ec223d3d","shortId":"tgAyhP","kind":"x402","title":"DeFi liquidity data for QNT token, paid per-request via x402 on Base network.","tagline":"DeFi liquidity data for QNT token, paid per-request via x402 on Base network.","description":"This endpoint at lowpaymentfee.com provides DeFi liquidity data for the QNT (Quant) token. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure APIs, all payable per-request via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/defi/QNT/liquidity` accepts POST requests and returns JSON. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0.02 USD per request), consistent with the platform's uniform $0.02/request pricing across all endpoints. Payment is settled on-chain on Base to a specified wallet address, with no API keys, rate limits, or subscriptions required.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the liquidity endpoint returns. The endpoint is confirmed live (returns a valid 402 challenge), but the actual data schema and coverage details for QNT liquidity are unknown.","tags":[],"capabilities":["defi-liquidity-data","qnt-token","per-request-payment","x402-protocol","base-network","usdc-settlement","no-api-key","json-response"],"categories":["defi","finance"],"synonyms":["QNT liquidity","Quant token liquidity","DeFi liquidity API","QNT DeFi data","token liquidity endpoint","crypto liquidity"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI schema or request/response examples provided","The specific endpoint /api/v1/defi/QNT/liquidity is not listed on the provider's homepage; only broader categories are shown","Actual data quality, freshness, and coverage for QNT liquidity are completely unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/QNT/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/QNT/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on request parameters, response schema, or what liquidity data is actually returned. Docs pages are empty. This is effectively a stub 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'/request':110 '0.02':99,109 '000':94 '20':93 '402':186 'DeFi liquidity API' 'QNT DeFi data' 'QNT liquidity' 'Quant token liquidity' 'accept':79 'across':112 'actual':190 'addit':157 'address':127 'ai/ml':54 'analyt':53 'api':59,130,143 'base':14,29,71,95,122 'base-network' 'broader':49 'chain':120 'challeng':87,187 'confirm':181 'connect':152 'consist':103 'cost':91 'coverag':194 'crypto liquidity' 'data':3,18,38,52,191 'defi':1,16,36 'defi-liquidity-data' 'descript':170 'detail':159,195 'doc':142 'document':137 'endpoint':32,77,114,176,179 'exampl':167 'extrem':139 'field':173 'finance/web3':56 'indic':88 'infer':55 'infrastructur':58 'json':84 'json-response' 'key':131 'limit':133 'liquid':2,17,37,175,198 'live':182 'lowpaymentfee.com':34 'maximum':90 'network':15,30,72 'no-api-key' 'offer':51 'on-chain':118 'openapi':163 'page':147 'paid':7,22 'part':46 'payabl':61 'payment':115 'per':9,24,63,101 'per-request':8,23,62 'per-request-payment' 'platform':50,106 'post':80 'price':111,144 'prompt':154 'protocol':68 'provid':35 'qnt':5,20,41,197 'qnt-token' 'quant':42 'rate':132 'readm':146 'render':149 'request':10,25,64,81,102 'request/response':166 'requir':136 'return':83,177,183 'schema':164,192 'settl':117 'spars':140 'specif':76 'specifi':125 'subscript':135 'technic':158 'token':6,21,43 'token liquidity endpoint' 'uniform':108 'unit':96 'unknown':200 'usd':100 'usdc':74,98 'usdc-settlement' 'use':73 'valid':185 'via':11,26,65 'wallet':126,153 'x402':12,27,67,86 'x402-protocol'","prices":[{"id":"45d988c2-ef2b-46da-90ec-784b906bbce8","listingId":"0bd97658-090c-45f6-a4ce-d5e9ec223d3d","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/QNT/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":"2026-04-18T18:34:54.562Z"}],"sources":[{"listingId":"0bd97658-090c-45f6-a4ce-d5e9ec223d3d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/QNT/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:54.562Z","lastSeenAt":"2026-04-22T23:00:51.103Z"}],"details":{"listingId":"0bd97658-090c-45f6-a4ce-d5e9ec223d3d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/QNT/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\"","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/QNT/liquidity"},{"claim":"Platform-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/QNT/liquidity"}],"useCases":["Querying current liquidity pool data for QNT across DeFi protocols","Monitoring QNT liquidity depth for trading or arbitrage strategies","Integrating QNT liquidity metrics into dashboards or bots"],"bestFor":["Agents or bots needing on-demand QNT liquidity snapshots without API key management","Developers wanting pay-per-call DeFi data with crypto-native settlement","Low-volume or sporadic queries where subscription pricing is wasteful"],"notFor":["High-frequency trading requiring sub-second latency and guaranteed SLAs","Users who need comprehensive multi-token liquidity data in a single call","Anyone without a Base-network USDC wallet for payment"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:52.375Z"},"updatedAt":"2026-04-22T23:00:51.103Z"}}