{"slug":"x402-donnyautomation-com-v4hooks-d447a6","title":"Uniswap v4 hook capability scan on Base mainnet","host":"x402.donnyautomation.com","method":"GET","resource":"https://x402.donnyautomation.com/v4hooks","category":"other","description":"Uniswap v4 hook capability scan on Base mainnet. Decodes all 14 permission bits from the hook address per v4-core Hooks.sol, flags swap custody, fee-taking and EIP-1967 upgradeability, and verifies source by Basescan/Sourcify/Blockscout consensus. Returns custodyClass PASSIVE|FLOW_CONTROL|FEE_TAKING","price_listed":0.01,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":3,"reported_payers_30d":2,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"address":"0x000052423c1dB6B7ff8641b85A7eEfc7B2791888"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"address":{"description":"Uniswap v4 hook contract address on Base mainnet (0x + 40 hex chars).","type":"string"}},"required":["address"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Uniswap v4 hook capability scan on Base mainnet. Decodes all 14 permission bits from the hook address per v4-core Hooks.sol, flags swap custody, fee-taking and EIP-1967 upgradeability, and verifies source by Basescan/Sourcify/Blockscout consensus. Returns custodyClass PASSIVE|FLOW_CONTROL|FEE_TAKING|SWAP_CUSTODY|OPAQUE, flags[], riskFlags[] and verificationState. Requires ?address=0x + 40 hex. Errors: 400 invalid_address, 502 analysis_failed. Capability analysis - it never outputs SAFE.","last_updated":"2026-09-17T03:33:54.089Z","schemes":["exact"]}