{"id":"9b9560c0-2da4-4174-a198-4b3731a163d3","shortId":"456WRe","kind":"x402","title":"DeFi liquidity data for JST token, paid per-request via x402 on Base network.","tagline":"DeFi liquidity data for JST token, paid per-request via x402 on Base network.","description":"This endpoint at lowpaymentfee.com provides DeFi liquidity data for the JST (JUST) token. It is part of a broader platform offering data & analytics, AI/ML, finance/Web3, and infrastructure APIs, all accessible via the x402 payment protocol on the Base network with no API keys or rate limits required.\n\nThe specific endpoint `/api/v1/defi/JST/liquidity` accepts POST requests and returns JSON. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The maximum amount required per request is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). This matches the platform's advertised flat pricing of $0.02 per request across all endpoints.\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 response contains. The endpoint is confirmed live via a valid 402 challenge, but the actual data quality and response structure are unknown.","tags":[],"capabilities":["defi-liquidity-data","jst-token","x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key"],"categories":["defi","finance"],"synonyms":["JST liquidity","JUST token liquidity","DeFi liquidity API","token liquidity data","JST DeFi","crypto liquidity endpoint","x402 DeFi API"],"warnings":["No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response fields","The specific /defi/JST/liquidity endpoint is not listed on the homepage's available APIs section, raising questions about its official status","Response data structure is completely unknown — cannot verify what liquidity data is returned"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/JST/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/JST/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 with a valid x402 402 challenge and clear pricing ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no description of what the liquidity data actually contains. The docs pages are all empty wallet-connect stubs. This is effectively a stub 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'0.02':112,126 '000':105 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':94 '20':104 '402':181 '6':115 'DeFi liquidity API' 'JST DeFi' 'JST liquidity' 'JUST token liquidity' 'accept':82 'access':60 'across':129 'actual':185 'addit':152 'advertis':122 'ai/ml':54 'amount':99 'analyt':53 'api':58,72,138 'base':14,29,68,96,106 'base-network' 'broader':49 'challeng':182 'confirm':176 'connect':147 'contain':172 'contract':93 'crypto liquidity endpoint' 'data':3,18,38,52,186 'decim':116 'defi':1,16,36 'defi-liquidity-data' 'descript':165 'detail':154 'doc':137 'document':132 'endpoint':32,80,131,174 'equal':111 'exampl':162 'extrem':134 'field':168 'finance/web3':55 'flat':123 'infrastructur':57 'json':87 'jst':5,20,41 'jst-token' 'key':73 'limit':76 'liquid':2,17,37,170 'live':177 'lowpaymentfee.com':34 'match':118 'maximum':98 'network':15,30,69 'no-api-key' 'offer':51 'openapi':158 'page':142 'paid':7,22 'part':46 'payment':64,88 'per':9,24,101,127 'per-request':8,23 'per-request-pricing' 'platform':50,120 'post':83 'price':124,139 'prompt':149 'protocol':65 'provid':35 'qualiti':187 'rate':75 'readm':141 'render':144 'request':10,25,84,102,128 'request/response':161 'requir':77,100 'respons':171,189 'return':86 'schema':159 'settl':90 'spars':135 'specif':79 'structur':190 'technic':153 'token':6,21,43 'token liquidity data' 'unit':107 'unknown':192 'usdc':92,109,113 'usdc-settlement' 'use':114 'valid':180 'via':11,26,61,178 'wallet':148 'x402':12,27,63 'x402 DeFi API' 'x402-payment'","prices":[{"id":"8738aa4a-64ae-4caa-a011-16f20b7622f5","listingId":"9b9560c0-2da4-4174-a198-4b3731a163d3","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/JST/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":"2026-04-18T18:34:55.142Z"}],"sources":[{"listingId":"9b9560c0-2da4-4174-a198-4b3731a163d3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/JST/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:55.142Z","lastSeenAt":"2026-04-22T23:00:51.145Z"}],"details":{"listingId":"9b9560c0-2da4-4174-a198-4b3731a163d3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/JST/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/JST/liquidity"},{"claim":"Platform advertises $0.02 per request flat pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/JST/liquidity"}],"useCases":["Querying real-time liquidity depth for the JST (JUST) token across DeFi protocols","Monitoring JST liquidity conditions for trading or arbitrage bots","Integrating JST liquidity metrics into portfolio dashboards"],"bestFor":["Agents or bots needing on-demand JST liquidity data without API key management","Developers building DeFi dashboards who want pay-per-call pricing","Automated trading systems that need low-friction access to token liquidity info"],"notFor":["Users needing comprehensive multi-token liquidity data in a single call","Anyone requiring detailed API documentation or guaranteed SLAs before integrating","Free-tier or high-volume consumers where $0.02/request adds up quickly"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:52.281Z"},"updatedAt":"2026-04-22T23:00:51.145Z"}}