{"id":"42fd7ec4-2a05-4dd4-a1ec-9f947c9efa38","shortId":"Wa3X2D","kind":"x402","title":"MINA liquidity data via x402 micropayment on Base — $0.02 per request, no API key needed.","tagline":"MINA liquidity data via x402 micropayment on Base — $0.02 per request, no API key needed.","description":"This endpoint at lowpaymentfee.com provides DeFi liquidity data for the MINA token. It is part of a broader platform offering data analytics, AI/ML inference, finance/Web3, and infrastructure APIs, all gated behind the x402 payment protocol on the Base network. Each request costs $0.02 in USDC (the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC, which has 6 decimals, equaling $0.02).\n\nThe endpoint accepts POST requests and returns JSON. No API key or account registration is required — callers pay per request by attaching an X-PAYMENT header with a valid x402 payment proof. The platform advertises no rate limits and instant access. Payment settles on the Base L2 network using the USDC contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.\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 description of what fields the liquidity endpoint accepts or returns. The endpoint is confirmed live (returns a proper 402 challenge), but the actual data shape and coverage for MINA liquidity are unknown.","tags":[],"capabilities":["defi-liquidity-data","mina-token","x402-micropayment","base-network","usdc-settlement","per-request-pricing","no-api-key"],"categories":["defi","finance"],"synonyms":["MINA liquidity","MINA DeFi","MINA pool data","crypto liquidity API","DeFi data API","MINA market data","x402 DeFi endpoint"],"warnings":["No API documentation available — all doc pages return only a 'Connect wallet' prompt","No request or response schema provided; data shape for MINA liquidity is unknown","Platform appears to be a generic multi-category API storefront; quality and reliability of DeFi data source is unverified","No SLA, rate limit, or uptime guarantees documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/MINA/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/MINA/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 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 returned only 'Connect wallet' with no useful content. The actual data returned by this endpoint is entirely 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'000':84 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':149 '20':83 '402':201 '6':91 'DeFi data API' 'MINA DeFi' 'MINA liquidity' 'MINA market data' 'MINA pool data' 'accept':97,190 'access':136 'account':107 'actual':205 'advertis':79,130 'ai/ml':53 'analyt':52 'api':13,28,58,104,157 'attach':116 'base':8,23,68,85,141 'base-network' 'behind':61 'broader':48 'caller':111 'challeng':78,202 'confirm':196 'connect':166 'content':172 'contract':147 'cost':72 'coverag':209 'crawl':155 'crypto liquidity API' 'data':3,18,38,51,206 'decim':92 'defi':36 'defi-liquidity-data' 'descript':183 'doc':156 'document':150 'endpoint':32,96,189,194 'equal':93 'exampl':180 'extrem':152 'field':186 'finance/web3':55 'gate':60 'header':121 'infer':54 'infrastructur':57 'instant':135 'json':102 'key':14,29,105 'l2':142 'limit':133 'liquid':2,17,37,188,212 'live':197 'lowpaymentfee.com':34 'maxamountrequir':81 'micropay':6,21 'mina':1,16,41,211 'mina-token' 'need':15,30 'network':69,143 'no-api-key' 'offer':50 'openapi':176 'page':161 'part':45 'pay':112 'payment':64,120,126,137 'per':10,25,113 'per-request-pricing' 'platform':49,129 'post':98 'price':158 'prompt':168 'proof':127 'proper':200 'protocol':65 'provid':35 'rate':132 'readm':160 'registr':108 'request':11,26,71,99,114 'request/response':179 'requir':110 'return':101,163,192,198 'schema':177 'settl':138 'shape':207 'spars':153 'token':42 'unit':86 'unknown':214 'usdc':75,88,146 'usdc-settlement' 'use':144 'valid':124 'via':4,19 'wallet':167 'x':119 'x-payment':118 'x402':5,20,63,77,125 'x402 DeFi endpoint' 'x402-micropayment'","prices":[{"id":"ffdb4401-7c81-49d9-9487-ca6f03a43315","listingId":"42fd7ec4-2a05-4dd4-a1ec-9f947c9efa38","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/MINA/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":"2026-04-18T18:38:07.971Z"}],"sources":[{"listingId":"42fd7ec4-2a05-4dd4-a1ec-9f947c9efa38","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/MINA/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:07.971Z","lastSeenAt":"2026-04-22T19:30:50.018Z"}],"details":{"listingId":"42fd7ec4-2a05-4dd4-a1ec-9f947c9efa38","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/MINA/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 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/MINA/liquidity"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/MINA/liquidity"},{"claim":"Documentation, API, pricing, and README pages all show only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying current liquidity pool data for the MINA token","Building DeFi dashboards that include MINA liquidity metrics","Automated trading bots needing MINA liquidity depth information","Research and analytics on MINA DeFi ecosystem"],"bestFor":["Agents or bots that need on-demand MINA liquidity data without managing API keys","Developers prototyping DeFi tools who want pay-per-call pricing","Low-volume consumers who don't want subscription commitments"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users needing detailed API documentation or guaranteed schema stability","Anyone who cannot pay with USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:42.857Z"},"updatedAt":"2026-04-22T19:30:50.018Z"}}