{"slug":"chain-openverbs-com-v1-proxy-dca521","title":"Detect whether a contract is an upgradeable proxy and resolve its implementation","host":"chain.openverbs.com","method":"POST","resource":"https://chain.openverbs.com/v1/proxy","category":"market","description":"Detect whether a contract is an upgradeable proxy and resolve its implementation: reads the standard EIP-1967 implementation/admin/beacon slots, EIP-1822 (UUPS), the OpenZeppelin legacy slot, and EIP-1167 minimal-proxy bytecode. Returns the proxy type, implementation, admin and beacon addresses when","price_listed":0.004,"price_asked":0.004,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":466,"reported_calls_30d":2,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"additionalProperties":false,"properties":{"address":{"description":"Contract address to inspect.","pattern":"^0x[0-9a-fA-F]{40}$","type":"string"},"chain":{"description":"EVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default \"ethereum\".","enum":["ethereum","base","arbitrum","optimism","polygon"],"type":"string"}},"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-09-24","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.004,"price_match":true,"latency_ms":466,"error":null}],"description_full":"Detect whether a contract is an upgradeable proxy and resolve its implementation: reads the standard EIP-1967 implementation/admin/beacon slots, EIP-1822 (UUPS), the OpenZeppelin legacy slot, and EIP-1167 minimal-proxy bytecode. Returns the proxy type, implementation, admin and beacon addresses when present. Reads live on-chain data with automatic endpoint fallback.","last_updated":"2026-09-20T08:38:34.043Z","schemes":["exact"]}