{"id":"49ab1615-1675-4853-ac08-4e91f6f4cb7d","shortId":"X774KA","kind":"x402","title":"BAL liquidity data via x402 micropayment on Base network for $0.02/request","tagline":"BAL liquidity data via x402 micropayment on Base network for $0.02/request","description":"This endpoint at lowpaymentfee.com provides DeFi liquidity data for the BAL (Balancer) token. It is part of a broader suite of pay-per-request APIs offered by lowpaymentfee.com, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The endpoint is accessed via HTTP POST and is gated by the x402 payment protocol, settling in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and requires a maximum payment of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per request. No API keys or rate limits are advertised — access is granted purely through per-call micropayment. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.\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 fields the BAL liquidity endpoint accepts or returns. The endpoint path suggests it returns liquidity-related data for the Balancer (BAL) DeFi protocol, but the exact input parameters and response shape are unknown.","tags":[],"capabilities":["defi-liquidity-data","bal-balancer","x402-micropayment","usdc-payment","base-network","pay-per-request","no-api-key"],"categories":["defi","finance"],"synonyms":["Balancer liquidity","BAL liquidity pool","DeFi liquidity API","Balancer protocol data","BAL token liquidity","crypto liquidity endpoint"],"warnings":["No OpenAPI schema or endpoint documentation available","Request body parameters and response shape are completely unknown","Docs, API, pricing, and README pages all render only a 'Connect wallet' prompt with no useful content","Endpoint functionality (what BAL liquidity data is returned) is inferred solely from the URL path"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/BAL/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/BAL/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no description of what the endpoint actually returns. The listing is effectively a stub with only the payment challenge as evidence of 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'0.02':11,23,105 '000':100 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':137 '20':99 '300':142 '6':110 'BAL liquidity pool' 'BAL token liquidity' 'Balancer liquidity' 'Balancer protocol data' 'DeFi liquidity API' 'accept':186 'access':66,122 'address':136 'advertis':121 'ai/ml':57 'analyt':56 'api':50,115,151 'bal':1,13,35,183,202 'bal-balancer' 'balanc':36,201 'base':8,20,83,101 'base-network' 'broader':43 'call':129 'challeng':87 'confirm':88 'connect':160 'content':166 'crawl':149 'crypto liquidity endpoint' 'data':3,15,32,55,198 'decim':111 'defi':30,203 'defi-liquidity-data' 'descript':178 'detail':177 'doc':150 'document':144 'endpoint':26,64,90,185,190 'exact':207 'exampl':174 'extrem':146 'field':181 'finance/web3':59 'gate':72 'grant':124 'http':68 'infer':58 'infrastructur':61 'input':208 'key':116 'limit':119 'liquid':2,14,31,184,196 'liquidity-rel':195 'live':92 'lowpaymentfee.com':28,53 'maximum':96 'micropay':6,18,130 'network':9,21,84 'no-api-key' 'offer':51 'openapi':170 'page':155 'paramet':209 'part':40 'path':191 'pay':47 'pay-per-request':46 'payment':76,97,132 'per':48,112,128 'per-cal':127 'post':69 'price':152 'prompt':162 'protocol':77,204 'provid':29 'pure':125 'rate':118 'readm':154 'relat':197 'request':49,113 'request/response':173 'requir':94 'respons':211 'return':157,188,194 'schema':171 'second':143 'sent':134 'settl':78 'shape':212 'sinc':107 'span':54 'spars':147 'suggest':192 'suit':44 'timeout':140 'token':37 'unit':102 'unknown':214 'usd':106 'usdc':80,104,108 'usdc-payment' 'use':109 'util':62 'via':4,16,67 'wallet':161 'x402':5,17,75,86 'x402-micropayment'","prices":[{"id":"69e5d76c-fee7-4b1c-9255-077b1295d6c0","listingId":"49ab1615-1675-4853-ac08-4e91f6f4cb7d","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/BAL/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":"2026-04-18T18:33:54.433Z"}],"sources":[{"listingId":"49ab1615-1675-4853-ac08-4e91f6f4cb7d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/BAL/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:33:54.433Z","lastSeenAt":"2026-04-23T00:30:59.943Z"}],"details":{"listingId":"49ab1615-1675-4853-ac08-4e91f6f4cb7d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/BAL/liquidity \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/BAL/liquidity"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/BAL/liquidity"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The endpoint is categorized under Finance & Web3 on the provider's landing page","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying current liquidity metrics for Balancer (BAL) pools","Building DeFi dashboards that display BAL liquidity depth","Automated trading bots that need real-time BAL liquidity data","Portfolio analytics tools integrating multi-protocol liquidity info"],"bestFor":["Agents or bots needing on-demand BAL liquidity data without API key management","Developers prototyping DeFi tools who want instant pay-per-call access","Low-volume consumers who prefer micropayments over subscription plans"],"notFor":["Users needing comprehensive DeFi analytics across many protocols in a single call","Anyone requiring detailed documentation or guaranteed SLAs before integration","High-volume consumers where per-request pricing may add up compared to flat-rate alternatives"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T09:31:10.997Z"},"updatedAt":"2026-04-23T00:30:59.943Z"}}