{"id":"9067f84b-6e9f-464c-ab75-c7366567aa23","shortId":"9JNdZU","kind":"x402","title":"DeFi liquidity data for FIL via x402 micropayment on Base, $0.02/request.","tagline":"DeFi liquidity data for FIL via x402 micropayment on Base, $0.02/request.","description":"This endpoint at lowpaymentfee.com provides DeFi liquidity data for Filecoin (FIL) via the x402 payment protocol. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints on the platform share a uniform pricing model of $0.02 per request, settled in USDC on the Base network with no API keys, rate limits, or upfront commitments required.\n\nThe specific endpoint `/api/v1/defi/FIL/liquidity` accepts POST requests and returns JSON. The x402 challenge confirms it is live, advertising a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme to the provider's wallet. The timeout for payment settlement is 300 seconds.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The endpoint name suggests it returns liquidity pool or liquidity metric data for FIL in a DeFi context, but the exact response format and accepted request parameters are unknown.","tags":[],"capabilities":["defi-liquidity-data","filecoin","x402-micropayment","usdc-base","pay-per-request","json-api"],"categories":["defi","finance"],"synonyms":["FIL liquidity","Filecoin DeFi","DeFi liquidity API","FIL pool data","crypto liquidity endpoint","Filecoin liquidity pools"],"warnings":["No API documentation available — docs, pricing, and API pages all render only 'Connect wallet'","No OpenAPI or JSON schema for request or response bodies","This specific endpoint (/api/v1/defi/FIL/liquidity) is not listed on the provider's homepage; it may be undocumented or experimental","Response format and accepted request parameters are completely unknown"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/FIL/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/FIL/liquidity","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The endpoint's actual behavior and output format are entirely unknown, making this effectively a stub 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'/request':12,24 '0.02':11,23,79,132 '000':121 '0x8335':126 '20':120 '2913':127 '300':157 '6':136 'DeFi liquidity API' 'FIL liquidity' 'FIL pool data' 'Filecoin DeFi' 'Filecoin liquidity pools' 'accept':103,222 'advertis':116 'ai/ml':62 'analyt':61 'api':53,91,167 'avail':193 'base':10,22,87,122,129 'broader':46 'call':52 'challeng':111 'commit':97 'confirm':112 'connect':173 'context':215 'crawl':196 'crypto liquidity endpoint' 'data':3,15,32,60,209 'decim':137 'defi':1,13,30,214 'defi-liquidity-data' 'detail':180 'doc':164 'document':159 'endpoint':26,69,101,199 'equal':131 'exact':144,218 'exampl':192 'extrem':161 'fil':5,17,35,211 'filecoin':34 'finance/web3':64 'format':220 'given':133 'infer':63 'infrastructur':66 'json':108 'json-api' 'key':92 'limit':94 'liquid':2,14,31,204,207 'live':115 'lowpaymentfee.com':28 'made':140 'materi':197 'maxamountrequir':118 'metric':208 'micropay':8,20 'model':77 'name':200 'network':88 'offer':54 'openapi':184 'page':168 'paramet':224 'part':43 'pay':50 'pay-per-cal':49 'pay-per-request' 'payment':39,138,154 'per':51,80 'platform':72 'pool':205 'post':104 'price':76,165 'prompt':175 'protocol':40 'provid':29,58,148 'rate':93 'render':170 'request':81,105,223 'request/response':187 'requir':98 'respons':219 'return':107,203 'schema':188 'scheme':145 'second':158 'settl':82 'settlement':155 'share':73 'span':59 'spars':162 'spec':185 'specif':100 'suggest':201 'suit':47 'technic':179 'timeout':152 'uniform':75 'unit':123 'unknown':226 'upfront':96 'usag':191 'usdc':84,125,134 'usdc-base' 'util':67 'via':6,18,36,141 'wallet':150,174 'x402':7,19,38,110,143 'x402-micropayment'","prices":[{"id":"4122e3a5-ba05-4f11-9f79-b3ea8def0d52","listingId":"9067f84b-6e9f-464c-ab75-c7366567aa23","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/FIL/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":"2026-04-18T18:32:33.935Z"}],"sources":[{"listingId":"9067f84b-6e9f-464c-ab75-c7366567aa23","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/FIL/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:33.935Z","lastSeenAt":"2026-04-23T02:30:36.150Z"}],"details":{"listingId":"9067f84b-6e9f-464c-ab75-c7366567aa23","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/FIL/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 advertising 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/defi/FIL/liquidity"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/FIL/liquidity"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying current DeFi liquidity metrics for Filecoin (FIL)","Integrating FIL liquidity data into trading bots or dashboards","Agent-driven DeFi research requiring per-call payment without API keys"],"bestFor":["AI agents needing on-demand FIL DeFi liquidity data without signup","Developers prototyping DeFi dashboards who want instant access","Low-volume consumers who prefer pay-per-call over subscriptions"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users needing detailed API documentation or guaranteed response schemas before integration","Consumers who need liquidity data for tokens other than FIL from this specific endpoint"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:59.306Z"},"updatedAt":"2026-04-23T02:30:36.150Z"}}