{"id":"6d35957b-41e2-4dda-9443-23ae0fd14739","shortId":"THDgYh","kind":"x402","title":"DeFi liquidity data for ETC via x402 micropayment on Base, $0.02 per request.","tagline":"DeFi liquidity data for ETC via x402 micropayment on Base, $0.02 per request.","description":"This endpoint provides DeFi liquidity data for Ethereum Classic (ETC) through the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs covering data analytics, AI/ML inference, finance, crypto, and utility services. The endpoint uses the x402 payment protocol, settling in USDC on the Base network at $0.02 per call.\n\nThe specific endpoint `/api/v1/defi/ETC/liquidity` is categorized under Finance & Web3 and returns JSON data. Payment is handled inline via the X-PAYMENT header — no API keys, accounts, or rate limits are required. The x402 challenge was confirmed live, advertising a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02.\n\nDocumentation beyond the landing page 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 spec, no request/response schema, and no example payloads available. The exact shape of the liquidity data returned is unknown and must be discovered by making a paid request.","tags":[],"capabilities":["defi-liquidity-data","etc-ethereum-classic","x402-micropayment","usdc-base-network","pay-per-request","no-api-key","json-response"],"categories":["defi","finance","crypto"],"synonyms":["ETC liquidity","Ethereum Classic DeFi","DeFi liquidity API","ETC pool data","crypto liquidity endpoint","x402 DeFi API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","The /api/v1/defi/ETC/liquidity path is not listed among the provider's advertised endpoints on the landing page","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no useful content","No examples or sample responses available; data quality and structure cannot be verified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/ETC/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/ETC/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 402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The specific endpoint path (/api/v1/defi/ETC/liquidity) is not even listed on the provider's landing page, raising questions about its completeness. Effectively a stub 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'0.02':11,24,79,134 '000':125 '20':124 '6':130 'DeFi liquidity API' 'ETC liquidity' 'ETC pool data' 'Ethereum Classic DeFi' 'account':108 'addit':159 'advertis':120 'ai/ml':57 'analyt':56 'api':53,106,145 'avail':174 'base':10,23,76,126 'beyond':136 'broader':46 'call':81 'categor':87 'challeng':116 'classic':35 'confirm':118 'connect':154 'cover':54 'crypto':60 'crypto liquidity endpoint' 'data':3,16,32,55,94,181 'decim':131 'defi':1,14,30 'defi-liquidity-data' 'detail':161 'discov':188 'doc':144 'document':135 'endpoint':28,65,84 'equal':133 'etc':5,18,36 'etc-ethereum-classic' 'ethereum':34 'exact':176 'exampl':172 'extrem':141 'financ':59,89 'handl':97 'header':104 'infer':58 'inlin':98 'json':93 'json-response' 'key':107 'land':138 'limit':111 'liquid':2,15,31,180 'live':119 'lowpaymentfee.com':39 'make':190 'maxamountrequir':122 'micropay':8,21 'must':186 'network':77 'no-api-key' 'openapi':165 'page':139,149 'paid':192 'part':43 'pay':50 'pay-per-request':49 'payload':173 'payment':69,95,103 'per':12,25,51,80 'platform':40 'price':146 'prompt':156 'protocol':70 'provid':29 'rate':110 'readm':148 'render':151 'request':13,26,52,193 'request/response':168 'requir':113 'return':92,182 'schema':169 'servic':63 'settl':71 'shape':177 'spars':142 'spec':166 'specif':83 'suit':47 'technic':160 'unit':127 'unknown':184 'usdc':73,129 'usdc-base-network' 'use':66 'util':62 'via':6,19,99 'wallet':155 'web3':90 'x':102 'x-payment':101 'x402':7,20,68,115 'x402 DeFi API' 'x402-micropayment'","prices":[{"id":"b8ac10c2-6e28-4db0-8a9b-0ad4c5dd6e21","listingId":"6d35957b-41e2-4dda-9443-23ae0fd14739","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/ETC/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":"2026-04-18T18:37:45.825Z"}],"sources":[{"listingId":"6d35957b-41e2-4dda-9443-23ae0fd14739","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/ETC/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:45.825Z","lastSeenAt":"2026-04-22T20:00:36.682Z"}],"details":{"listingId":"6d35957b-41e2-4dda-9443-23ae0fd14739","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/ETC/liquidity \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/ETC/liquidity"},{"claim":"The platform charges $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/ETC/liquidity"}],"useCases":["Querying current DeFi liquidity metrics for Ethereum Classic (ETC)","Building dashboards that aggregate cross-chain DeFi liquidity","Automated trading or arbitrage bots needing ETC liquidity snapshots","Research and analytics on ETC DeFi ecosystem health"],"bestFor":["Agents or bots that need on-demand ETC liquidity data without managing API keys","Developers prototyping DeFi tools who want instant, pay-per-call access","Low-volume consumers who prefer micropayments over subscription plans"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need detailed documentation or OpenAPI specs before integrating","Anyone needing liquidity data for chains other than ETC from this specific endpoint"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:44.034Z"},"updatedAt":"2026-04-22T20:00:36.682Z"}}