{"id":"d124f6d2-f9b6-4219-8bf5-283930fcd37a","shortId":"g5nFxv","kind":"x402","title":"DeFi liquidity data for ANKR via x402 micropayment on Base, $0.02 per request.","tagline":"DeFi liquidity data for ANKR via x402 micropayment on Base, $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides DeFi liquidity data for the ANKR 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 (20,000 base units of USDC on Base, which has 6 decimals). No API keys or rate limits are required — callers simply attach an x402 payment header to each POST request.\n\nThe specific endpoint `/api/v1/defi/ANKR/liquidity` is not listed on the site's main landing page among the showcased APIs, but it follows the same URL pattern and returns a valid x402 402 challenge with identical pricing and payment parameters. The response MIME type is `application/json`. No detailed documentation, request schema, or response schema was found in the crawled pages — the docs, pricing, and README pages all rendered only a \"Connect wallet\" prompt with no further content.\n\nBecause no OpenAPI spec, request/response schemas, or usage examples are available, the exact fields accepted or returned by this endpoint are unknown. The platform advertises simple per-request pricing at $0.02 with no minimums, no commitments, and no API keys. Payment settles in USDC on the Base L2 network to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.","tags":[],"capabilities":["defi-liquidity-data","ankr-token","x402-payment","base-network","usdc-settlement","per-request-pricing","no-api-key"],"categories":["defi","finance"],"synonyms":["ANKR liquidity","DeFi liquidity API","ANKR DeFi data","token liquidity endpoint","crypto liquidity","ANKR pool data","Web3 liquidity API"],"warnings":["No API documentation, request schema, or response schema found — all doc pages show only 'Connect wallet'","This specific endpoint (/api/v1/defi/ANKR/liquidity) is not listed among the site's advertised APIs","Exact response format and fields are unknown — integrate with caution","No OpenAPI or ai-plugin manifest available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/ANKR/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/ANKR/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, no OpenAPI spec, request/response schema, documentation, or usage examples are available. The specific /defi/ANKR/liquidity path is not even listed on the site's landing page, and all doc pages render only a wallet-connect prompt. This is effectively a stub 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'0.02':11,24,69,209 '000':73 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':230 '20':72 '402':133 '6':82 'ANKR DeFi data' 'ANKR liquidity' 'ANKR pool data' 'DeFi liquidity API' 'Web3 liquidity API' 'accept':192 'address':229 'advertis':202 'ai/ml':49 'among':117 'analyt':48 'ankr':5,18,37 'ankr-token' 'api':54,85,120,217 'application/json':146 'attach':94 'avail':188 'base':10,23,64,74,79,225 'base-network' 'behind':57 'broader':44 'caller':92 'challeng':134 'commit':214 'connect':171 'content':177 'cost':68 'crawl':159 'crypto liquidity' 'data':3,16,34,47 'decim':83 'defi':1,14,32 'defi-liquidity-data' 'detail':148 'doc':162 'document':149 'endpoint':28,105,197 'exact':190 'exampl':186 'field':191 'finance/web3':51 'follow':123 'found':156 'gate':56 'header':98 'ident':136 'infer':50 'infrastructur':53 'key':86,218 'l2':226 'land':115 'limit':89 'liquid':2,15,33 'list':109 'lowpaymentfee.com':30 'main':114 'micropay':8,21 'mime':143 'minimum':212 'network':65,227 'no-api-key' 'offer':46 'openapi':180 'page':116,160,166 'paramet':140 'part':41 'pattern':127 'payment':60,97,139,219 'per':12,25,205 'per-request':204 'per-request-pricing' 'platform':45,201 'post':101 'price':137,163,207 'prompt':173 'protocol':61 'provid':31 'rate':88 'readm':165 'render':168 'request':13,26,67,102,150,206 'request/response':182 'requir':91 'respons':142,153 'return':129,194 'schema':151,154,183 'settl':220 'showcas':119 'simpl':203 'simpli':93 'site':112 'spec':181 'specif':104 'token':38 'token liquidity endpoint' 'type':144 'unit':75 'unknown':199 'url':126 'usag':185 'usdc':71,77,222 'usdc-settlement' 'valid':131 'via':6,19 'wallet':172 'x402':7,20,59,96,132 'x402-payment'","prices":[{"id":"1c060234-073c-4e05-8e54-bad7062f154a","listingId":"d124f6d2-f9b6-4219-8bf5-283930fcd37a","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/ANKR/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":"2026-04-18T18:34:36.585Z"}],"sources":[{"listingId":"d124f6d2-f9b6-4219-8bf5-283930fcd37a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/ANKR/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:34:36.585Z","lastSeenAt":"2026-04-22T23:00:50.169Z"}],"details":{"listingId":"d124f6d2-f9b6-4219-8bf5-283930fcd37a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/ANKR/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_header>\"","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/ANKR/liquidity"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"Payment asset is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/ANKR/liquidity"}],"useCases":["Querying current liquidity metrics for the ANKR token across DeFi protocols","Building dashboards that display ANKR liquidity depth in real time","Automated trading bots that need liquidity data before executing swaps","Portfolio analytics tools monitoring DeFi liquidity conditions"],"bestFor":["Agents or bots needing on-demand ANKR liquidity data without API key management","Developers prototyping DeFi tools who want instant pay-per-call access","Low-volume consumers who prefer micropayments over monthly subscriptions"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before integrating","High-frequency trading systems where $0.02 per call adds up significantly","Non-ANKR or multi-token liquidity queries (endpoint is ANKR-specific)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T17:20:12.502Z"},"updatedAt":"2026-04-22T23:00:50.169Z"}}