{"id":"5556cf58-7ed2-4256-8d23-e1b018fbf3b2","shortId":"wgj3bC","kind":"x402","title":"KLAY liquidity data via x402 micropayment on Base network, $0.02 per request.","tagline":"KLAY liquidity data via x402 micropayment on Base network, $0.02 per request.","description":"This endpoint provides DeFi liquidity data for the KLAY token, accessible through the x402 payment protocol. It is part of a broader suite of APIs offered by lowpaymentfee.com, which spans data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all gated behind per-request x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/defi/KLAY/liquidity` accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, requiring a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. No API keys or rate limits are advertised; access is granted purely through payment.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI schema, no example request/response, and no description of what fields the liquidity response contains. The endpoint's exact output structure must be discovered by making a paid call. The site lists many other endpoints at the same $0.02 price point, but none have documented schemas either.","tags":[],"capabilities":["defi-liquidity-data","klay-token","x402-payment","usdc-base-network","per-request-micropayment","json-api"],"categories":["defi","finance"],"synonyms":["KLAY liquidity","Klaytn liquidity","DeFi liquidity API","KLAY 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 request or response schema provided; output structure is unknown.","The site hosts dozens of endpoints across unrelated domains (AI, geocoding, finance) at identical pricing, which may indicate a generic or placeholder service.","Cannot verify data quality or source of KLAY liquidity information."],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/KLAY/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/KLAY/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 (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request parameters, response schema, or what 'KLAY liquidity' data actually contains. Docs pages are empty. No OpenAPI spec or examples 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'0.02':10,22,107,199 '000':102 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':119 '20':101 '6':112 'DeFi liquidity API' 'KLAY DeFi data' 'KLAY liquidity' 'Klaytn liquidity' 'accept':83 'access':35,128 'addit':155 'address':118 'advertis':127 'ai/ml':57 'analyt':56 'api':49,121,141 'base':8,20,76,103 'behind':65 'broader':46 'call':115,189 'challeng':91 'confirm':92 'connect':150 'contain':175 'crawl':139 'crypto liquidity' 'data':3,15,30,55 'decim':113 'defi':28 'defi-liquidity-data' 'descript':168 'detail':157 'discov':184 'doc':140 'document':134,205 'either':207 'endpoint':26,80,94,177,195 'exact':179 'exampl':164 'extrem':136 'field':171 'finance/web3':59 'gate':64 'grant':130 'infer':58 'infrastructur':61 'json':88 'json-api' 'key':122 'klay':1,13,33 'klay-token' 'limit':125 'liquid':2,14,29,173 'list':192 'live':96 'lowpaymentfee.com':52 'make':186 'mani':193 'maximum':99 'micropay':6,18,70 'must':182 'network':9,21,77 'none':203 'offer':50 'openapi':161 'output':180 'page':145 'paid':116,188 'part':43 'payment':39,133 'per':11,23,67,114 'per-request':66 'per-request-micropayment' 'point':201 'post':84 'price':142,200 'prompt':152 'protocol':40 'provid':27 'pure':131 'rate':124 'readm':144 'request':12,24,68,85 'request/response':165 'requir':97 'respons':174 'return':87,147 'schema':162,206 'settl':71 'sinc':109 'site':191 'span':54 'spars':137 'specif':79 'structur':181 'suit':47 'technic':156 'token':34 'token liquidity endpoint' 'unit':104 'usd':108 'usdc':73,106,110 'usdc-base-network' 'use':111 'util':62 'via':4,16 'wallet':151 'x402':5,17,38,69,90 'x402-payment'","prices":[{"id":"052772d4-02fc-4e8c-ba14-8ed4fb50e373","listingId":"5556cf58-7ed2-4256-8d23-e1b018fbf3b2","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/KLAY/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":"2026-04-18T18:33:59.895Z"}],"sources":[{"listingId":"5556cf58-7ed2-4256-8d23-e1b018fbf3b2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/KLAY/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:59.895Z","lastSeenAt":"2026-04-23T00:31:00.797Z"}],"details":{"listingId":"5556cf58-7ed2-4256-8d23-e1b018fbf3b2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/KLAY/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":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/KLAY/liquidity"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/KLAY/liquidity"},{"claim":"All endpoints priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, API, pricing, and README pages contain only 'Connect wallet' with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying current liquidity pool data for the KLAY token","Monitoring KLAY DeFi liquidity as part of a trading bot or analytics dashboard","Integrating KLAY liquidity metrics into an agent workflow that pays per call"],"bestFor":["Agents or bots needing on-demand KLAY liquidity data without API key management","Developers experimenting with x402-gated DeFi data endpoints","Low-volume consumers who prefer pay-per-request over subscriptions"],"notFor":["Users needing detailed documentation or guaranteed response schemas before integrating","High-frequency trading systems where $0.02 per request adds up significantly","Anyone needing liquidity data for tokens other than KLAY from this specific endpoint"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T18:18:11.828Z"},"updatedAt":"2026-04-23T00:31:00.797Z"}}