{"id":"7cb78721-cfea-4b8b-9800-cc440b3355b1","shortId":"NWKrsx","kind":"x402","title":"Pay-per-use DeFi intelligence API: swaps, technical analysis, yield, audits, and whale tracking via x402 micropayments.","tagline":"Pay-per-use DeFi intelligence API: swaps, technical analysis, yield, audits, and whale tracking via x402 micropayments.","description":"Silverback is a suite of 11 DeFi intelligence and execution endpoints accessible via the x402 micropayment protocol. It covers swap routing and execution (Base via Permit2, Solana via Jupiter), technical analysis with indicators like RSI/MACD/Bollinger Bands, DeFi yield opportunity scanning, cross-DEX arbitrage detection, token security audits (honeypot/tax/ownership checks), whale transaction tracking, wallet portfolio lookups, liquidity pool analysis, swap quoting, and token holder analytics. Payments are settled in USDC on Base, Solana, or SKALE, with an optional 15% discount when paying with the $BACK token via Permit2 on Base.\n\nPricing is tiered by endpoint complexity: execution endpoints (swap) cost $0.05 per call, heavy analysis endpoints (technical-analysis, defi-yield, arbitrage-scanner) cost $0.03, intelligence endpoints (token-audit, whale-moves, wallet-portfolio) cost $0.02, and lighter analysis endpoints (pool-analysis, swap-quote, jupiter-quote, holder-analytics) cost $0.01. All responses return JSON with a `success` boolean field. Token identifiers use CoinGecko IDs for market data or 0x contract addresses for on-chain queries; chain defaults to Base (chain ID 8453) unless specified.\n\nNote: The specific endpoint probed (`/api/v1/agent-discover`) returned 404, and the OpenAPI spec lists the canonical server as `https://x402.silverbackdefi.app` rather than the Render deployment URL. The full OpenAPI 3.1 schema with request/response definitions is available, and the landing page at the Render origin is live (HTTP 200). Agents should target the canonical server URL for production calls.","tags":[],"capabilities":["token-swap","technical-analysis","defi-yield-scanning","arbitrage-detection","token-security-audit","whale-tracking","wallet-portfolio","liquidity-pool-analysis","swap-quote","jupiter-dex-quote","holder-analytics","x402-micropayments","permit2-signing","multi-chain"],"categories":["defi","crypto","finance"],"synonyms":["DeFi API","crypto intelligence","swap routing","yield farming API","token audit","whale tracker","liquidity analysis","arbitrage scanner","x402 DeFi","agent economy API"],"warnings":["The probed endpoint /api/v1/agent-discover returned 404 on both GET and POST — it is not listed in the OpenAPI spec and may not exist.","The OpenAPI canonical server is https://x402.silverbackdefi.app, different from the probed Render URL; liveness of the canonical server was not verified.","The /docs path returns 'Cannot GET /docs' — external documentation link is broken.","No example response bodies are provided in the OpenAPI spec or crawl data."],"endpointUrl":"https://silverback-x402.onrender.com/api/v1/agent-discover","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xD34411a70EffbDd000c529bbF572082ffDcF1794","amount":"10000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"8wLKe8H59eni5DmERU27GiRHGnN9fogRoq9yNqyKKNJA"},"payTo":"4HVvnhyXTkMnPbMBo9r3kfvYhzW4JSbLGdXg9SkUcVSe","amount":"10000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300},{"asset":"0x85889c8c714505E0c94b30fcfcF64fE3Ac8FCb20","extra":{"name":"USD Coin","version":"1"},"payTo":"0xD34411a70EffbDd000c529bbF572082ffDcF1794","amount":"10000","scheme":"exact","network":"eip155:1187947933","maxTimeoutSeconds":300},{"asset":"USDC","extra":{"symbol":"USDC","nodeUrl":"https://api.keeta.com","decimals":6,"serverAddress":"keeta_aabwgiqyij4scwktdoczzvhpi33btieeses5sezeqzqmpi5ik76ttyegwuvfsai","permissionSetupUrl":"/api/v1/keeta/setup-permission"},"payTo":"keeta_aabaolle2k3hceayy4vkyw7smgl35o5wbqeebt2fibyx5sxxodneqb2rmwqkjci","amount":"10000","scheme":"keeta-usdc","network":"keeta:main","expiresAt":1771370260706,"paymentId":"318e782e-8977-4642-bfd5-8d6a407dc16f","amountHuman":"0.010000","description":"Find registered agents matching criteria (reputation threshold, tags, etc.)","tokenAddress":"keeta_amnkge74xitii5dsobstldatv3irmyimujfjotftx7plaaaseam4bntb7wnna","maxTimeoutSeconds":300,"requiresPermission":true}]},"qualityScore":"0.600","qualityRationale":"Full OpenAPI 3.1 schema with 11 endpoints, clear pricing tiers, and detailed request schemas are provided. However, the probed endpoint (/api/v1/agent-discover) returned 404 rather than the expected 402 challenge, no example responses are available, and the external docs link is broken (Cannot GET /docs). The canonical server URL differs from the probed URL, so liveness of the canonical server is 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'0.01':184 '0.02':166 '0.03':153 '0.05':137 '0x':203 '11':42 '15':115 '200':265 '3.1':247 '404':227 '8453':217 'DeFi API' 'access':48 'address':205 'agent':266 'agent economy API' 'analysi':10,28,67,95,141,145,169,173 'analyt':101,182 'api':7,25 'arbitrag':80,150 'arbitrage scanner' 'arbitrage-detection' 'arbitrage-scann':149 'audit':12,30,84,158 'avail':253 'back':121 'band':72 'base':60,108,126,214 'boolean':192 'call':139,275 'canon':234,270 'chain':209,211,215 'check':86 'coingecko':197 'complex':132 'contract':204 'cost':136,152,165,183 'cover':55 'cross':78 'cross-dex':77 'crypto intelligence' 'data':201 'default':212 'defi':5,23,43,73,147 'defi-yield':146 'defi-yield-scanning' 'definit':251 'deploy':242 'detect':81 'dex':79 'discount':116 'endpoint':47,131,134,142,155,170,223 'execut':46,59,133 'field':193 'full':245 'heavi':140 'holder':100,181 'holder-analyt':180 'holder-analytics' 'honeypot/tax/ownership':85 'http':264 'id':198,216 'identifi':195 'indic':69 'intellig':6,24,44,154 'json':188 'jupit':65,178 'jupiter-dex-quote' 'jupiter-quot':177 'land':256 'lighter':168 'like':70 'liquid':93 'liquidity analysis' 'liquidity-pool-analysis' 'list':232 'live':263 'lookup':92 'market':200 'micropay':18,36,52 'move':161 'multi-chain' 'note':220 'on-chain':207 'openapi':230,246 'opportun':75 'option':114 'origin':261 'page':257 'pay':2,20,118 'pay-per-us':1,19 'payment':102 'per':3,21,138 'permit2':62,124 'permit2-signing' 'pool':94,172 'pool-analysi':171 'portfolio':91,164 'price':127 'probe':224 'product':274 'protocol':53 'queri':210 'quot':97,176,179 'rather':238 'render':241,260 'request/response':250 'respons':186 'return':187,226 'rout':57 'rsi/macd/bollinger':71 'scan':76 'scanner':151 'schema':248 'secur':83 'server':235,271 'settl':104 'silverback':37 'skale':111 'solana':63,109 'spec':231 'specif':222 'specifi':219 'success':191 'suit':40 'swap':8,26,56,96,135,175 'swap routing' 'swap-quot':174 'swap-quote' 'target':268 'technic':9,27,66,144 'technical-analysi':143 'technical-analysis' 'tier':129 'token':82,99,122,157,194 'token audit' 'token-audit':156 'token-security-audit' 'token-swap' 'track':15,33,89 'transact':88 'unless':218 'url':243,272 'usdc':106 'use':4,22,196 'via':16,34,49,61,64,123 'wallet':90,163 'wallet-portfolio':162 'whale':14,32,87,160 'whale tracker' 'whale-mov':159 'whale-tracking' 'x402':17,35,51 'x402 DeFi' 'x402-micropayments' 'x402.silverbackdefi.app':237 'yield':11,29,74,148 'yield farming API'","prices":[{"id":"bdc04d20-cd49-4039-b1ac-8063d0476638","listingId":"7cb78721-cfea-4b8b-9800-cc440b3355b1","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0xD34411a70EffbDd000c529bbF572082ffDcF1794","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xD34411a70EffbDd000c529bbF572082ffDcF1794","amount":"10000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"8wLKe8H59eni5DmERU27GiRHGnN9fogRoq9yNqyKKNJA"},"payTo":"4HVvnhyXTkMnPbMBo9r3kfvYhzW4JSbLGdXg9SkUcVSe","amount":"10000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300},{"asset":"0x85889c8c714505E0c94b30fcfcF64fE3Ac8FCb20","extra":{"name":"USD Coin","version":"1"},"payTo":"0xD34411a70EffbDd000c529bbF572082ffDcF1794","amount":"10000","scheme":"exact","network":"eip155:1187947933","maxTimeoutSeconds":300},{"asset":"USDC","extra":{"symbol":"USDC","nodeUrl":"https://api.keeta.com","decimals":6,"serverAddress":"keeta_aabwgiqyij4scwktdoczzvhpi33btieeses5sezeqzqmpi5ik76ttyegwuvfsai","permissionSetupUrl":"/api/v1/keeta/setup-permission"},"payTo":"keeta_aabaolle2k3hceayy4vkyw7smgl35o5wbqeebt2fibyx5sxxodneqb2rmwqkjci","amount":"10000","scheme":"keeta-usdc","network":"keeta:main","expiresAt":1771370260706,"paymentId":"318e782e-8977-4642-bfd5-8d6a407dc16f","amountHuman":"0.010000","description":"Find registered agents matching criteria (reputation threshold, tags, etc.)","tokenAddress":"keeta_amnkge74xitii5dsobstldatv3irmyimujfjotftx7plaaaseam4bntb7wnna","maxTimeoutSeconds":300,"requiresPermission":true}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:34.290Z"}],"sources":[{"listingId":"7cb78721-cfea-4b8b-9800-cc440b3355b1","source":"x402_bazaar","sourceId":"https://silverback-x402.onrender.com/api/v1/agent-discover","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:34.290Z","lastSeenAt":"2026-04-22T04:02:49.666Z"}],"details":{"listingId":"7cb78721-cfea-4b8b-9800-cc440b3355b1","quickStartSnippet":"# Get a swap quote on Base (x402 payment required)\ncurl -X POST https://x402.silverbackdefi.app/api/v1/swap-quote \\\n  -H 'Content-Type: application/json' \\\n  -d '{\"tokenIn\": \"WETH\", \"tokenOut\": \"USDC\", \"amountIn\": \"1.0\"}'","exampleRequest":{"tokenIn":"WETH","amountIn":"1.0","tokenOut":"USDC"},"exampleResponse":null,"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Silverback provides 11 pay-per-use endpoints via x402 micropayments with USDC on Base, Solana, and SKALE","source_url":"https://silverback-x402.onrender.com"},{"claim":"Pricing tiers: Execution $0.05, Heavy analysis $0.03, Intelligence $0.02, Analysis $0.01","source_url":"https://silverback-x402.onrender.com"},{"claim":"$BACK token payments offer a 15% discount via Permit2 on Base","source_url":"https://silverback-x402.onrender.com"},{"claim":"Canonical server URL is https://x402.silverbackdefi.app per OpenAPI spec","source_url":"https://silverback-x402.onrender.com"},{"claim":"The /api/v1/agent-discover endpoint returned 404 on POST and GET","source_url":"https://silverback-x402.onrender.com/api/v1/agent-discover"}],"useCases":["Autonomous trading agents that need swap execution and quoting on Base or Solana","Portfolio monitoring bots that track wallet holdings and whale movements","Risk assessment pipelines that audit token contracts before investing","Yield optimization agents scanning DeFi protocols for risk-adjusted returns","Market analysis tools computing technical indicators for crypto tokens"],"bestFor":["AI agents needing pay-per-call DeFi data without subscriptions","On-chain trading bots on Base and Solana","Automated token security screening before trades","Cross-DEX arbitrage opportunity detection"],"notFor":["High-frequency trading requiring sub-second latency (hosted on Render)","Non-crypto or traditional finance data needs","Free-tier or subscription-only billing models"],"kindDetails":{},"updatedAt":"2026-04-22T01:08:26.268Z"}}