{"id":"0200f9ae-7592-404b-a074-99c2dd38199f","shortId":"FPX6BW","kind":"x402","title":"Risk-adjusted DeFi yield intelligence with portfolio allocation recommendations via x402 micropayments.","tagline":"Risk-adjusted DeFi yield intelligence with portfolio allocation recommendations via x402 micropayments.","description":"The Silverback DeFi Yield endpoint provides on-demand DeFi yield opportunity analysis through the x402 micropayment protocol. For $0.03 per call (paid in USDC on Base, Solana, or SKALE), it returns risk-adjusted yield data including APR figures, risk scores, and suggested portfolio allocation. You can filter by token (symbol or contract address) and specify a risk tolerance level (low, medium, or high).\n\nThis endpoint is part of the broader Silverback x402 API, which offers 11 pay-per-use DeFi intelligence and execution endpoints. The defi-yield endpoint accepts POST requests with a JSON body. No required parameters are enforced — you can call it with an empty body for general yield opportunities, or pass a specific token and risk tolerance to narrow results. All responses include a `success` boolean field.\n\nPayment is handled via the x402 protocol: an initial request returns a 402 Payment Required response with payment options. You sign a USDC authorization, attach the payment proof header, and resend the request to receive the JSON response. The endpoint supports USDC on Base (chain 8453), Solana, and SKALE Base Hub (zero gas). A 15% discount is available when paying with the $BACK token via Permit2 on Base.","tags":[],"capabilities":["defi-yield-analysis","risk-adjusted-returns","portfolio-allocation","x402-micropayments","usdc-payment","multi-chain-settlement","pay-per-use"],"categories":["defi","finance"],"synonyms":["yield farming","DeFi APR","yield optimization","yield aggregator","DeFi returns","liquidity mining","yield intelligence","staking yields"],"warnings":["The docs link (https://docs.silverbackdefi.app/) was not crawled and the /docs path on the API server returns 404.","No example response body is available — response schema is described only as a summary string.","The 402 challenge object captured in the probe is empty, so exact payment parameters (token address, amount in base units) could not be independently verified from the probe alone."],"endpointUrl":"https://x402.silverbackdefi.app/api/v1/defi-yield","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0xD34411a70EffbDd000c529bbF572082ffDcF1794","amount":"30000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"8wLKe8H59eni5DmERU27GiRHGnN9fogRoq9yNqyKKNJA"},"payTo":"4HVvnhyXTkMnPbMBo9r3kfvYhzW4JSbLGdXg9SkUcVSe","amount":"30000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300},{"asset":"0x85889c8c714505E0c94b30fcfcF64fE3Ac8FCb20","extra":{"name":"USD Coin","version":"1"},"payTo":"0xD34411a70EffbDd000c529bbF572082ffDcF1794","amount":"30000","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":"30000","scheme":"keeta-usdc","network":"keeta:main","expiresAt":1771370261744,"paymentId":"003cb443-17bd-472f-b591-ca22d136bf98","amountHuman":"0.030000","description":"DeFi yield opportunities on Base chain","tokenAddress":"keeta_amnkge74xitii5dsobstldatv3irmyimujfjotftx7plaaaseam4bntb7wnna","maxTimeoutSeconds":300,"requiresPermission":true}]},"qualityScore":"0.720","qualityRationale":"Full OpenAPI schema with clear endpoint description, pricing, and request parameters. The endpoint is live (402 challenge captured). However, the 402 challenge body is empty (no payment details in the probe), no example response is available, and the docs link returns a 404. Pricing and behavior are well-documented in the OpenAPI guidance 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'post':120 'proof':188 'protocol':44,167 'provid':32 'receiv':195 'recommend':10,23 'request':121,170,193 'requir':127,175 'resend':191 'respons':155,176,198 'result':153 'return':58,171 'risk':2,15,60,67,85,149 'risk-adjust':1,14,59 'risk-adjusted-returns' 'score':68 'sign':181 'silverback':28,99 'skale':56,209 'solana':54,207 'specif':146 'specifi':83 'staking yields' 'success':158 'suggest':70 'support':201 'symbol':78 'token':77,147,224 'toler':86,150 'usdc':51,183,202 'usdc-payment' 'use':108 'via':11,24,164,225 'x402':12,25,42,100,166 'x402-micropayments' 'yield':5,18,30,37,62,117,141 'yield aggregator' 'yield farming' 'yield intelligence' 'yield optimization' 'zero':212","prices":[{"id":"48228159-6448-48f8-94ae-87ac76bd610d","listingId":"0200f9ae-7592-404b-a074-99c2dd38199f","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":"30000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"8wLKe8H59eni5DmERU27GiRHGnN9fogRoq9yNqyKKNJA"},"payTo":"4HVvnhyXTkMnPbMBo9r3kfvYhzW4JSbLGdXg9SkUcVSe","amount":"30000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300},{"asset":"0x85889c8c714505E0c94b30fcfcF64fE3Ac8FCb20","extra":{"name":"USD Coin","version":"1"},"payTo":"0xD34411a70EffbDd000c529bbF572082ffDcF1794","amount":"30000","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":"30000","scheme":"keeta-usdc","network":"keeta:main","expiresAt":1771370261744,"paymentId":"003cb443-17bd-472f-b591-ca22d136bf98","amountHuman":"0.030000","description":"DeFi yield opportunities on Base chain","tokenAddress":"keeta_amnkge74xitii5dsobstldatv3irmyimujfjotftx7plaaaseam4bntb7wnna","maxTimeoutSeconds":300,"requiresPermission":true}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:33.977Z"}],"sources":[{"listingId":"0200f9ae-7592-404b-a074-99c2dd38199f","source":"x402_bazaar","sourceId":"https://x402.silverbackdefi.app/api/v1/defi-yield","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:33.977Z","lastSeenAt":"2026-04-22T04:02:49.237Z"}],"details":{"listingId":"0200f9ae-7592-404b-a074-99c2dd38199f","quickStartSnippet":"curl -X POST https://x402.silverbackdefi.app/api/v1/defi-yield \\\n  -H \"Content-Type: application/json\" \\\n  -d '{\"token\": \"USDC\", \"riskTolerance\": \"medium\"}'","exampleRequest":{"token":"USDC","riskTolerance":"medium"},"exampleResponse":null,"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"DeFi yield endpoint costs $0.03 per call (heavy analysis tier)","source_url":"https://x402.silverbackdefi.app"},{"claim":"Supports USDC on Base, Solana, and SKALE; $BACK token with 15% discount","source_url":"https://x402.silverbackdefi.app"},{"claim":"11 pay-per-use endpoints via x402 micropayments","source_url":"https://x402.silverbackdefi.app"},{"claim":"Endpoint accepts token (symbol or address) and riskTolerance (low/medium/high) parameters","source_url":"https://x402.silverbackdefi.app"},{"claim":"Returns yield opportunities with APR, risk scores, and allocation recommendations","source_url":"https://x402.silverbackdefi.app"}],"useCases":["AI agents autonomously scanning for the best risk-adjusted DeFi yield opportunities","Portfolio managers comparing yield options across protocols filtered by risk tolerance","Automated strategies that query yield data before allocating capital to DeFi positions","Dashboards displaying real-time yield opportunities with risk scores"],"bestFor":["Autonomous DeFi agents needing pay-per-call yield intelligence","Developers building yield aggregation tools on Base, Solana, or SKALE","Risk-aware portfolio allocation across DeFi protocols"],"notFor":["Users who need free or subscription-based unlimited yield data","Direct yield farming execution (this endpoint returns data, not transactions)","Non-crypto or traditional finance yield analysis"],"kindDetails":{},"updatedAt":"2026-04-22T01:09:37.552Z"}}