{"id":"45a74c1d-6fff-4ae0-a51a-17f557761b04","shortId":"Z2bjh7","kind":"x402","title":"Protocol risk scoring via TVL trend analysis, paid per call with USDC on Base via x402.","tagline":"Protocol risk scoring via TVL trend analysis, paid per call with USDC on Base via x402.","description":"DeFi Shield's `/api/protocol/risk` endpoint provides protocol-level risk assessment based on TVL (Total Value Locked) trend analysis. It is one of 69 paid API endpoints offered by DeFi Shield, a security intelligence platform designed for autonomous AI agents. The endpoint accepts POST requests and costs $0.50 per call, settled in USDC on Base via the x402 payment protocol.\n\nThe broader DeFi Shield platform spans 11 categories including DeFi intelligence, wallet intelligence, protocol intelligence, MEV & trading, NFT intelligence, cross-chain analysis, safety & compliance, developer security, agent-to-agent trust, data infrastructure, and real-time monitoring. Each endpoint supports free GET-based discovery (returning an LLM usage prompt) and paid POST requests requiring an x402 payment header. The platform advertises an agent card at `/.well-known/agent-card.json` and a health/discovery endpoint at `/api/health`.\n\nThe specific `/api/protocol/risk` endpoint sits within the Protocol Intelligence category alongside related endpoints for TVL decomposition, governance risk, protocol comparison, emission modeling, oracle risk, and bridge risk. No OpenAPI schema or detailed request/response documentation was found during crawling — the docs page returns 404. The endpoint returned a 402 status on POST probe, confirming it is live and expecting x402 payment, though the challenge body was empty, which limits confidence in the exact payment parameters.","tags":[],"capabilities":["protocol-risk-scoring","tvl-trend-analysis","x402-payment","usdc-on-base","defi-intelligence","agent-to-agent-api","per-request-pricing"],"categories":["defi","security"],"synonyms":["protocol risk assessment","TVL risk analysis","DeFi protocol scoring","protocol safety check","DeFi risk API","protocol TVL trend","DeFi Shield protocol risk"],"warnings":["No OpenAPI or detailed API documentation found (docs page returns 404)","x402 challenge body was empty — exact payment parameters (asset address, amount, network) not confirmed from probe","Request and response schemas are inferred, not documented","Example request body is speculative based on endpoint purpose"],"endpointUrl":"https://defi-shield-hazel.vercel.app/api/protocol/risk","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x4765092Fe75D2A42C76CEac2Cc249bB2246a527d","amount":"500000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is confirmed live (402 on POST), and the landing page provides pricing ($0.50) and a brief description. However, no OpenAPI schema, detailed docs, request/response examples, or non-empty x402 challenge body were found. The docs page returns 404. Request body shape is inferred from context, not 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'/api/health':167 '/api/protocol/risk':36,170 '0.50':80 '11':99 '402':215 '404':210 '69':56 'DeFi Shield protocol risk' 'DeFi protocol scoring' 'DeFi risk API' 'TVL risk analysis' 'accept':75 'advertis':156 'agent':72,121,123,158 'agent-to-ag':120 'agent-to-agent-api' 'ai':71 'alongsid':178 'analysi':7,23,51,115 'api':58 'assess':43 'autonom':70 'base':14,30,44,87,138 'bodi':231 'bridg':193 'broader':94 'call':10,26,82 'card':159 'categori':100,177 'chain':114 'challeng':230 'comparison':187 'complianc':117 'confid':236 'confirm':220 'cost':79 'crawl':205 'cross':113 'cross-chain':112 'data':125 'decomposit':183 'defi':33,62,95,102 'defi-intelligence' 'design':68 'detail':199 'develop':118 'discoveri':139 'doc':207 'document':201 'emiss':188 'empti':233 'endpoint':37,59,74,133,165,171,180,212 'exact':239 'expect':225 'found':203 'free':135 'get':137 'get-bas':136 'govern':184 'header':153 'health/discovery':164 'includ':101 'infrastructur':126 'intellig':66,103,105,107,111,176 'level':41 'limit':235 'live':223 'llm':142 'lock':49 'mev':108 'model':189 'monitor':131 'nft':110 'offer':60 'one':54 'openapi':196 'oracl':190 'page':208 'paid':8,24,57,146 'paramet':241 'payment':91,152,227,240 'per':9,25,81 'per-request-pricing' 'platform':67,97,155 'post':76,147,218 'probe':219 'prompt':144 'protocol':1,17,40,92,106,175,186 'protocol TVL trend' 'protocol risk assessment' 'protocol safety check' 'protocol-level':39 'protocol-risk-scoring' 'provid':38 'real':129 'real-tim':128 'relat':179 'request':77,148 'request/response':200 'requir':149 'return':140,209,213 'risk':2,18,42,185,191,194 'safeti':116 'schema':197 'score':3,19 'secur':65,119 'settl':83 'shield':34,63,96 'sit':172 'span':98 'specif':169 'status':216 'support':134 'though':228 'time':130 'total':47 'trade':109 'trend':6,22,50 'trust':124 'tvl':5,21,46,182 'tvl-trend-analysis' 'usag':143 'usdc':12,28,85 'usdc-on-base' 'valu':48 'via':4,15,20,31,88 'wallet':104 'within':173 'x402':16,32,90,151,226 'x402-payment'","prices":[{"id":"68978bfc-b7f4-489d-a3d1-c721bee3225a","listingId":"45a74c1d-6fff-4ae0-a51a-17f557761b04","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x4765092Fe75D2A42C76CEac2Cc249bB2246a527d","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x4765092Fe75D2A42C76CEac2Cc249bB2246a527d","amount":"500000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:40.968Z"}],"sources":[{"listingId":"45a74c1d-6fff-4ae0-a51a-17f557761b04","source":"x402_bazaar","sourceId":"https://defi-shield-hazel.vercel.app/api/protocol/risk","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:40.968Z","lastSeenAt":"2026-04-22T05:32:33.834Z"}],"details":{"listingId":"45a74c1d-6fff-4ae0-a51a-17f557761b04","quickStartSnippet":"# Discover endpoint details (free)\ncurl https://defi-shield-hazel.vercel.app/api/protocol/risk\n\n# Paid request (requires x402 payment header)\ncurl -X POST https://defi-shield-hazel.vercel.app/api/protocol/risk \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{\"protocol\": \"aave\"}'","exampleRequest":{"protocol":"aave"},"exampleResponse":null,"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The /api/protocol/risk endpoint provides protocol risk via TVL trend analysis and costs $0.50 per call","source_url":"https://defi-shield-hazel.vercel.app"},{"claim":"DeFi Shield offers 69 paid API endpoints selling security intelligence to autonomous AI agents, paid per request with USDC via x402 on Base","source_url":"https://defi-shield-hazel.vercel.app"},{"claim":"Every endpoint supports free GET-based discovery with llm_usage_prompt","source_url":"https://defi-shield-hazel.vercel.app"},{"claim":"Agent discovery card available at /.well-known/agent-card.json","source_url":"https://defi-shield-hazel.vercel.app"},{"claim":"The endpoint returned HTTP 402 on POST, confirming it is live","source_url":"https://defi-shield-hazel.vercel.app/api/protocol/risk"}],"useCases":["AI agents evaluating protocol safety before allocating funds","Automated portfolio managers screening DeFi protocols by risk level","Due diligence tooling that checks TVL trends for protocol health","Agent workflows comparing multiple protocols before yield farming"],"bestFor":["Autonomous AI agents needing per-call DeFi risk intelligence","Developers building automated DeFi safety pipelines","Agents that settle micropayments in USDC on Base via x402"],"notFor":["Users needing free or subscription-based risk data without per-call crypto payments","Real-time streaming risk monitoring (this is a request-response endpoint)","Non-DeFi protocol risk assessment"],"kindDetails":{},"updatedAt":"2026-04-22T02:54:46.362Z"}}