{"id":"b18061f8-55de-42ea-8862-6c110aefab86","shortId":"pGHVbz","kind":"x402","title":"Litecoin DeFi liquidity data via pay-per-request x402 on Base (USDC).","tagline":"Litecoin DeFi liquidity data via pay-per-request x402 on Base (USDC).","description":"This endpoint at lowpaymentfee.com provides Litecoin (LTC) DeFi liquidity data through the x402 payment protocol. Each request costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required. The caller simply includes an X-PAYMENT header with a valid x402 payment proof to receive a JSON response.\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 market data, and utility services, all priced at $0.02 per request. The specific `/api/v1/defi/LTC/liquidity` route is not listed on the site's landing page catalog, but it follows the same x402 scheme and pricing pattern as the advertised endpoints.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no example payloads available. The endpoint is confirmed live (returns a proper 402 challenge with x402 Version 1), but without documentation it is unclear exactly what fields the liquidity response contains or what POST body parameters (if any) are accepted.","tags":[],"capabilities":["defi-liquidity-data","litecoin","x402-payment","usdc-base","pay-per-request","json-api"],"categories":["defi","finance"],"synonyms":["LTC liquidity","Litecoin DeFi","DeFi liquidity API","crypto liquidity data","LTC pool data","Litecoin liquidity endpoint"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no technical content.","No OpenAPI or request/response schema provided; response format is unknown.","This specific endpoint (/api/v1/defi/LTC/liquidity) is not listed on the provider's landing page catalog of available APIs.","Cannot verify what data is actually returned without making a paid request."],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/LTC/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/LTC/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, confirming it exists and accepts payments. However, there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific /defi/LTC/liquidity route is not even listed on the provider's own landing page catalog. This is effectively a stub 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'0.02':45,114 '1':193 '402':188 'DeFi liquidity API' 'LTC liquidity' 'LTC pool data' 'Litecoin DeFi' 'Litecoin liquidity endpoint' 'accept':215 'advertis':143 'ai/ml':103 'analyt':102 'api':53,99,153 'avail':179 'base':12,25,50 'bodi':210 'broader':88 'call':98 'caller':63 'catalog':130 'challeng':189 'confirm':183 'connect':159 'contain':206 'cost':44 'crypto liquidity data' 'data':4,17,36,101,107 'defi':2,15,34 'defi-liquidity-data' 'detail':166 'doc':150 'document':145,196 'dozen':93 'endpoint':28,83,144,181 'exact':200 'exampl':177 'extrem':147 'field':202 'finance/web3':105 'follow':133 'header':70 'includ':65 'infer':104 'json':80 'json-api' 'key':54 'land':128 'limit':57 'liquid':3,16,35,204 'list':123 'litecoin':1,14,32 'live':184 'lowpaymentfee.com':30,90 'ltc':33 'market':106 'network':51 'offer':92 'openapi':170 'page':129,154 'paramet':211 'part':85 'pattern':140 'pay':7,20,96 'pay-per-cal':95 'pay-per-request':6,19 'payload':178 'payment':40,69,75 'per':8,21,97,115 'platform':89 'post':209 'price':112,139,151 'prompt':161 'proof':76 'proper':187 'protocol':41 'provid':31 'rate':56 'receiv':78 'render':156 'request':9,22,43,116 'request/response':173 'requir':61 'respons':81,205 'return':185 'rout':120 'schema':174 'scheme':137 'servic':110 'simpli':64 'site':126 'span':100 'spars':148 'spec':171 'specif':118 'subscript':60 'technic':165 'unclear':199 'usdc':13,26,47 'usdc-base' 'util':109 'valid':73 'version':192 'via':5,18 'wallet':160 'without':195 'x':68 'x-payment':67 'x402':10,23,39,74,136,191 'x402-payment'","prices":[{"id":"a2c55f3e-8592-4416-ba50-31f8f839eb29","listingId":"b18061f8-55de-42ea-8862-6c110aefab86","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/LTC/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":"2026-04-18T18:37:38.498Z"}],"sources":[{"listingId":"b18061f8-55de-42ea-8862-6c110aefab86","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/LTC/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:38.498Z","lastSeenAt":"2026-04-22T20:00:36.362Z"}],"details":{"listingId":"b18061f8-55de-42ea-8862-6c110aefab86","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/LTC/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 Version 1 challenge with maxAmountRequired of 20000 base units (USDC on Base, i.e. $0.02)","source_url":"https://lowpaymentfee.com/api/v1/defi/LTC/liquidity"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The payment asset is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/LTC/liquidity"},{"claim":"Docs, pricing, and API pages render only a 'Connect wallet' prompt with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying current DeFi liquidity metrics for Litecoin","Monitoring LTC liquidity pools across DeFi protocols","Building dashboards that track Litecoin DeFi activity","Automated trading bots needing LTC liquidity snapshots"],"bestFor":["Developers needing on-demand LTC DeFi liquidity data without API key management","Agents or bots that can pay per call via x402 on Base","Projects already using USDC on Base that want frictionless API access"],"notFor":["Users who need detailed API documentation or guaranteed response schemas before integrating","High-frequency use cases where $0.02 per request adds up significantly","Anyone needing historical or batch liquidity data (no evidence of batch support)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:44.374Z"},"updatedAt":"2026-04-22T20:00:36.362Z"}}