{"id":"703f4ade-6000-482a-8294-960aca61ae96","shortId":"fUvsew","kind":"x402","title":"XRP liquidity data via pay-per-call x402 on Base (USDC, $0.02/request).","tagline":"XRP liquidity data via pay-per-call x402 on Base (USDC, $0.02/request).","description":"This endpoint at lowpaymentfee.com provides XRP liquidity data in the DeFi category, accessible via the x402 payment protocol. Each request costs $0.02, paid in USDC on the Base network — no API keys, no rate limits, and no subscriptions required. The endpoint accepts POST requests and returns JSON.\n\nThe provider hosts a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced uniformly at $0.02 per request. This specific endpoint (`/api/v1/defi/XRP/liquidity`) is focused on XRP liquidity information, though the exact response schema is not documented. The x402 challenge was successfully captured, confirming the endpoint is live and accepting payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.\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 response schema, and no example payloads available. The endpoint's exact output fields and data sources are unknown.","tags":[],"capabilities":["xrp-liquidity","defi-data","x402-payment","base-network","usdc-settlement","pay-per-call","json-response"],"categories":["defi","finance"],"synonyms":["XRP liquidity API","DeFi liquidity data","XRP market depth","x402 DeFi endpoint","crypto liquidity feed","XRP pool data"],"warnings":["No API documentation available — docs, pricing, and API pages all show only 'Connect wallet'","No request or response schema documented; exact output fields are unknown","This specific endpoint (/api/v1/defi/XRP/liquidity) is not listed on the provider's homepage catalog, raising questions about its status","Data source and freshness of XRP liquidity information are unspecified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/defi/XRP/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/XRP/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 (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The docs pages are empty. This is effectively a stub 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'/request':14,28 '0.02':13,27,50,101 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':138 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':141 'DeFi liquidity data' 'XRP liquidity API' 'XRP market depth' 'XRP pool data' 'accept':70,134 'access':41 'address':137 'ai/ml':91 'analyt':90 'api':59,87,152 'avail':178 'base':11,25,56,143 'base-network' 'broad':80 'call':8,22,86 'captur':127 'catalog':81 'categori':40 'challeng':124 'confirm':128 'connect':158 'cost':49 'crypto liquidity feed' 'data':3,17,36,89,186 'defi':39 'defi-data' 'detail':165 'doc':149 'document':121,144 'endpoint':30,69,106,130,180 'exact':116,182 'exampl':176 'extrem':146 'field':184 'finance/web3':93 'focus':109 'host':78 'infer':92 'inform':113 'infrastructur':95 'json':75 'json-response' 'key':60 'limit':63 'liquid':2,16,35,112 'live':132 'lowpaymentfee.com':32 'network':57 'openapi':169 'output':183 'page':153 'paid':51 'pay':6,20,84 'pay-per-cal':5,19,83 'pay-per-call' 'payload':177 'payment':45,135 'per':7,21,85,102 'post':71 'price':98,150 'prompt':160 'protocol':46 'provid':33,77 'rate':62 'render':155 'request':48,72,103 'requir':67 'respons':117,172 'return':74 'schema':118,173 'sourc':187 'span':88 'spars':147 'spec':170 'specif':105 'subscript':66 'success':126 'technic':164 'though':114 'uniform':99 'unknown':189 'usdc':12,26,53,140 'usdc-settlement' 'use':139 'util':96 'via':4,18,42 'wallet':159 'x402':9,23,44,123 'x402 DeFi endpoint' 'x402-payment' 'xrp':1,15,34,111 'xrp-liquidity'","prices":[{"id":"442fe94e-a481-4885-bf15-fdd2d8e355e6","listingId":"703f4ade-6000-482a-8294-960aca61ae96","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/XRP/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":"2026-04-18T18:38:17.057Z"}],"sources":[{"listingId":"703f4ade-6000-482a-8294-960aca61ae96","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/defi/XRP/liquidity","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:17.057Z","lastSeenAt":"2026-04-22T19:30:50.638Z"}],"details":{"listingId":"703f4ade-6000-482a-8294-960aca61ae96","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/defi/XRP/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":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/defi/XRP/liquidity"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/defi/XRP/liquidity"}],"useCases":["Querying real-time XRP liquidity metrics for DeFi applications","Integrating XRP liquidity data into trading bots or dashboards","Agent-driven DeFi research requiring per-call payment without API keys"],"bestFor":["Developers needing XRP liquidity data without subscription commitments","AI agents that can settle x402 payments on Base","Projects wanting keyless, pay-as-you-go DeFi data access"],"notFor":["Users needing detailed API documentation or guaranteed SLAs before integrating","High-frequency use cases where $0.02 per call adds up significantly","Anyone requiring non-USDC or non-Base payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:42.393Z"},"updatedAt":"2026-04-22T19:30:50.638Z"}}