{"id":"971a69ce-96f8-4e1b-85ce-ec35dc8abca5","shortId":"gDhLdQ","kind":"x402","title":"ATOM liquidity data via x402 micropayment on Base — $0.02 per request, no API key needed.","tagline":"ATOM 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 ATOM (Cosmos) via a pay-per-call x402 protocol. Each request costs $0.02 (20,000 base units of USDC on the Base network, where USDC has 6 decimals). No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header with each POST request.\n\nThe endpoint is part of a broader platform offering dozens of APIs across data analytics, AI/ML inference, finance/Web3, and infrastructure categories, all priced uniformly at $0.02 per request. This specific route (`/api/v1/defi/ATOM/liquidity`) falls under the Finance & Web3 category and presumably returns JSON data about ATOM liquidity pools or metrics, though the exact response schema is not documented.\n\nPayment settles on the Base L2 network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge specifies a 300-second payment timeout and uses the \"exact\" payment scheme. The endpoint is live and returns a proper 402 challenge when called without payment.","tags":[],"capabilities":["x402-payment","defi-liquidity-data","atom-cosmos","usdc-base-settlement","pay-per-request","no-api-key","json-response"],"categories":["defi","finance","crypto"],"synonyms":["ATOM liquidity","Cosmos liquidity data","DeFi liquidity API","ATOM pool data","crypto liquidity endpoint","Cosmos DeFi data"],"warnings":["No response schema or example response documented — actual output format is unknown","Documentation pages (/docs, /pricing, /README) returned no meaningful content","The endpoint description is generic ('Premium API Access') and does not describe the ATOM liquidity data specifically","Cannot verify what liquidity data (pools, depth, volume, etc.) is actually returned"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/ATOM/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/ATOM/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI schema, no documented response format, no examples, and the crawled docs/pricing/README pages are all blank beyond a 'Connect wallet' prompt. The actual data returned by this endpoint is 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'0.02':9,24,53,114 '000':55 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':156 '20':54 '300':162 '402':180 '6':67 'ATOM liquidity' 'ATOM pool data' 'Cosmos DeFi data' 'Cosmos liquidity data' 'DeFi liquidity API' 'account':72 'across':101 'ai/ml':104 'analyt':103 'api':13,28,70,100 'atom':1,16,40,133 'atom-cosmos' 'attach':80 'base':8,23,56,62,150 'broader':95 'call':47,183 'caller':78 'categori':109,126 'challeng':159,181 'contract':155 'cosmos':41 'cost':52 'crypto liquidity endpoint' 'data':3,18,38,102,131 'decim':68 'defi':36 'defi-liquidity-data' 'document':145 'dozen':98 'endpoint':32,90,173 'exact':140,169 'fall':121 'financ':124 'finance/web3':106 'header':84 'infer':105 'infrastructur':108 'json':130 'json-response' 'key':14,29,71 'l2':151 'limit':75 'liquid':2,17,37,134 'live':175 'lowpaymentfee.com':34 'metric':137 'micropay':6,21 'need':15,30 'network':63,152 'no-api-key' 'offer':97 'part':92 'pay':45 'pay-per-cal':44 'pay-per-request' 'payment':83,146,164,170,185 'per':10,25,46,115 'platform':96 'pool':135 'post':87 'presum':128 'price':111 'proper':179 'protocol':49 'provid':35 'rate':74 'request':11,26,51,88,116 'requir':77 'respons':141 'return':129,177 'rout':119 'schema':142 'scheme':171 'second':163 'settl':147 'simpli':79 'specif':118 'specifi':160 'though':138 'timeout':165 'uniform':112 'unit':57 'usdc':59,65,154 'usdc-base-settlement' 'use':153,167 'via':4,19,42 'web3':125 'without':184 'x402':5,20,48,82,158 'x402-payment'","prices":[{"id":"1e5fc3dc-6d0e-41e1-9ffb-45aa14eba6b3","listingId":"971a69ce-96f8-4e1b-85ce-ec35dc8abca5","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/ATOM/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":"2026-04-18T18:36:57.721Z"}],"sources":[{"listingId":"971a69ce-96f8-4e1b-85ce-ec35dc8abca5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/ATOM/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:57.721Z","lastSeenAt":"2026-04-22T21:30:31.103Z"}],"details":{"listingId":"971a69ce-96f8-4e1b-85ce-ec35dc8abca5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/ATOM/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\"","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/defi/ATOM/liquidity","method":"POST","headers":{"X-PAYMENT":"<x402_payment_token>","Content-Type":"application/json"}},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge advertising USDC on Base at 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/defi/ATOM/liquidity"},{"claim":"Platform pricing is $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 contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/ATOM/liquidity"}],"useCases":["Querying real-time ATOM liquidity pool data for trading bots","Monitoring Cosmos ecosystem DeFi liquidity for portfolio dashboards","Feeding ATOM liquidity metrics into automated DeFi strategies","Comparing ATOM liquidity across protocols for research"],"bestFor":["Agents or bots needing on-demand ATOM liquidity data without signup","Developers prototyping DeFi dashboards who want instant API access","Micropayment-native workflows that settle on Base L2"],"notFor":["Users needing free or bulk-discounted high-volume data feeds","Anyone requiring detailed response schema documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:46.307Z"},"updatedAt":"2026-04-22T21:30:31.103Z"}}