{"id":"72d42b54-6982-4cf2-9a09-593489278dfb","shortId":"xEKzjV","kind":"x402","title":"ENS liquidity data via x402 micropayment on Base — $0.02 per request, no API key needed.","tagline":"ENS liquidity data via x402 micropayment on Base — $0.02 per request, no API key needed.","description":"This endpoint at lowpaymentfee.com provides ENS (Ethereum Name Service) liquidity data under the DeFi category. It is part of a broader platform offering data, analytics, AI, finance, and infrastructure APIs, all gated behind x402 micropayments on the Base network using USDC.\n\nThe endpoint accepts POST requests and returns JSON. Payment is handled via the x402 protocol: callers include an X-PAYMENT header with a signed USDC payment on Base. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02. There are no API keys, no rate limits, and no subscription commitments — each request is individually paid.\n\nDocumentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what \"ENS liquidity\" data actually contains. The endpoint is confirmed live (returns a valid 402 challenge), but the exact request body format and response structure are unknown. Users should expect to experiment or contact the provider for integration details.","tags":[],"capabilities":["x402-payment","usdc-base","defi-data","ens-liquidity","per-request-pricing","no-api-key","json-response"],"categories":["defi","finance"],"synonyms":["ENS liquidity","Ethereum Name Service liquidity","DeFi liquidity data","ENS DeFi API","x402 DeFi endpoint","Base USDC API","ENS market data"],"warnings":["No API documentation available — docs, pricing, and README pages all return only a wallet-connect prompt","No OpenAPI or JSON schema for request or response bodies","Exact contents of ENS liquidity response are unknown and must be inferred or discovered experimentally","Platform lists many diverse endpoints (AI, geocoding, finance) at identical pricing, which may indicate a generic or placeholder service"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/ENS/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/ENS/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The exact data returned and required request body are unknown, making this effectively a stub 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'000':109 '20':108 '402':186 '6':114 'Base USDC API' 'DeFi liquidity data' 'ENS DeFi API' 'ENS liquidity' 'ENS market data' 'Ethereum Name Service liquidity' 'accept':74 'actual':176 'ai':56 'amount':103 'analyt':55 'api':13,28,60,122,143 'base':8,23,68,100,110 'behind':63 'bodi':192 'broader':51 'call':106 'caller':87 'categori':45 'challeng':187 'commit':130 'confirm':181 'connect':152 'contact':205 'contain':177 'content':158 'crawl':141 'data':3,18,41,54,175 'decim':115 'defi':44 'defi-data' 'descript':170 'detail':169,210 'doc':142 'document':136 'en':1,16,36,173 'endpoint':32,73,179 'ens-liquidity' 'equal':117 'ethereum':37 'exact':190 'exampl':166 'expect':201 'experi':203 'extrem':138 'financ':57 'format':193 'gate':62 'handl':82 'header':93 'includ':88 'individu':134 'infrastructur':59 'integr':209 'json':79 'json-response' 'key':14,29,123 'limit':126 'liquid':2,17,40,174 'live':182 'lowpaymentfee.com':34 'maximum':102 'micropay':6,21,65 'name':38 'need':15,30 'network':69 'no-api-key' 'offer':53 'openapi':162 'page':147 'paid':135 'part':48 'payment':80,92,98 'per':10,25,105 'per-request-pricing' 'platform':52 'post':75 'price':144 'prompt':154 'protocol':86 'provid':35,207 'rate':125 'readm':146 'request':11,26,76,132,191 'request/response':165 'requir':104 'respons':195 'return':78,149,183 'schema':163 'servic':39 'sign':96 'spars':139 'structur':196 'subscript':129 'unit':111 'unknown':198 'usdc':71,97,113 'usdc-base' 'use':70 'user':199 'valid':185 'via':4,19,83 'wallet':153 'x':91 'x-payment':90 'x402':5,20,64,85 'x402 DeFi endpoint' 'x402-payment'","prices":[{"id":"b40b72bd-369a-4c4b-887e-352d4ad0b207","listingId":"72d42b54-6982-4cf2-9a09-593489278dfb","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/ENS/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":"2026-04-18T18:35:19.203Z"}],"sources":[{"listingId":"72d42b54-6982-4cf2-9a09-593489278dfb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/ENS/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:19.203Z","lastSeenAt":"2026-04-22T23:00:54.397Z"}],"details":{"listingId":"72d42b54-6982-4cf2-9a09-593489278dfb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/ENS/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-signed-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/ENS/liquidity"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/ENS/liquidity"}],"useCases":["Querying ENS token or protocol liquidity metrics for DeFi dashboards","Automated agents monitoring ENS liquidity pools","Integrating ENS liquidity data into trading bots or analytics pipelines"],"bestFor":["Agents needing on-demand DeFi liquidity data without API key management","Developers building ENS-related analytics tools","Micropayment-native workflows on Base network"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before integrating","High-frequency bulk data retrieval where per-request pricing may add up","Non-crypto projects with no Base USDC payment capability"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:51.061Z"},"updatedAt":"2026-04-22T23:00:54.397Z"}}