{"id":"a124ec65-c61c-4a7d-917d-f09df38e8e90","shortId":"MjzuWF","kind":"x402","title":"LINK liquidity data via x402 micropayment on Base for $0.02/request","tagline":"LINK liquidity data via x402 micropayment on Base for $0.02/request","description":"This endpoint at lowpaymentfee.com provides DeFi liquidity data for the LINK (Chainlink) token. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol on the Base network using USDC. The specific resource path `/api/v1/defi/LINK/liquidity` suggests it returns liquidity pool or market depth information for LINK, though the exact response schema is not documented.\n\nThe endpoint accepts POST requests and charges a maximum of 20,000 base units of USDC (0.02 USD) per call, consistent with the provider's flat $0.02/request pricing across all endpoints. Payment is made via the x402 exact-payment scheme to a specified wallet address on Base. No API keys or account registration are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nDocumentation is extremely sparse. The provider's landing page lists many API categories (data/analytics, AI/ML, finance/web3, infrastructure) but the `/api/v1/defi/LINK/liquidity` endpoint is not explicitly listed among them, and no detailed docs, request parameters, or response examples are available. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content.","tags":[],"capabilities":["defi-liquidity-data","link-token","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["defi","finance"],"synonyms":["LINK liquidity","Chainlink liquidity","DeFi liquidity API","LINK pool data","token liquidity endpoint","Chainlink DeFi data"],"warnings":["This specific endpoint (/api/v1/defi/LINK/liquidity) is not listed among the provider's advertised APIs on the landing page","No request parameters or response schema documented anywhere","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content","Response format and fields are entirely unknown — callers must discover behavior empirically"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/LINK/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/LINK/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 (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no documentation for this specific endpoint, no request/response schema, no examples, and the endpoint isn't even listed on the provider's landing page. Docs pages are empty beyond a wallet connect 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'/request':11,22,115 '0.02':10,21,104,114 '000':99 '20':98 'Chainlink DeFi data' 'Chainlink liquidity' 'DeFi liquidity API' 'LINK liquidity' 'LINK pool data' 'accept':90 'account':141 'across':117 'address':134 'ai/ml':173 'among':184 'api':48,138,170,199 'attach':147 'avail':196 'base':8,19,60,100,136 'base-network' 'broader':41 'call':47,107 'caller':145 'categori':171 'chainlink':34 'charg':94 'connect':208 'consist':108 'content':214 'data':3,14,30 'data/analytics':172 'defi':28 'defi-liquidity-data' 'depth':76 'detail':188 'doc':189,198 'document':87,159 'endpoint':24,89,119,179 'exact':82,127 'exact-pay':126 'exampl':194 'explicit':182 'extrem':161 'finance/web3':174 'flat':113 'header':152 'inform':77 'infrastructur':175 'key':139 'land':166 'link':1,12,33,79 'link-token' 'liquid':2,13,29,72 'list':168,183 'lowpaymentfee.com':26,51 'made':122 'mani':169 'market':75 'maximum':96 'micropay':6,17 'network':61 'no-api-key' 'offer':49 'page':167,203 'paramet':191 'part':38 'path':67 'pay':45 'pay-per-cal':44 'pay-per-request' 'payment':120,128,151,157 'per':46,106 'pool':73 'post':91 'price':116,200 'prompt':210 'proof':158 'protocol':57 'provid':27,111,164 'readm':202 'registr':142 'render':205 'request':92,190 'requir':144 'resourc':66 'respons':83,193 'return':71 'schema':84 'scheme':129 'settl':53 'simpli':146 'spars':162 'specif':65 'specifi':132 'substant':213 'suggest':69 'suit':42 'though':80 'token':35 'token liquidity endpoint' 'unit':101 'usd':105 'usdc':63,103 'usdc-settlement' 'use':62 'valid':155 'via':4,15,54,123 'wallet':133,209 'x':150 'x-payment':149 'x402':5,16,56,125,156 'x402-payment'","prices":[{"id":"bf32ecc1-7de8-43bd-92bc-5b6a969339f8","listingId":"a124ec65-c61c-4a7d-917d-f09df38e8e90","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/LINK/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":"2026-04-18T18:35:06.662Z"}],"sources":[{"listingId":"a124ec65-c61c-4a7d-917d-f09df38e8e90","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/LINK/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:06.662Z","lastSeenAt":"2026-04-22T23:00:53.740Z"}],"details":{"listingId":"a124ec65-c61c-4a7d-917d-f09df38e8e90","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/LINK/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 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/LINK/liquidity"},{"claim":"The provider advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is used for payment on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/LINK/liquidity"}],"useCases":["Querying current liquidity depth for LINK across DeFi protocols","Monitoring LINK liquidity conditions for trading bots","Integrating LINK liquidity data into portfolio dashboards"],"bestFor":["Agents needing on-demand LINK liquidity snapshots without API key signup","Micropayment-based DeFi data consumption on Base","Automated trading systems that need per-call billing with no commitments"],"notFor":["Users needing comprehensive multi-token liquidity analytics with documented schemas","High-frequency use cases where $0.02/request adds up significantly","Anyone requiring detailed API documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:51.701Z"},"updatedAt":"2026-04-22T23:00:53.740Z"}}