{ "openapi": "3.1.1", "info": { "title": "Smart Contract Upgrade Explorer API", "version": "1.0.0", "summary": "Is this smart contract upgradeable, who controls upgrades, and what changed?", "description": "Every endpoint performs the same calculation as the human page and returns inputs, result, units, assumptions, sources, warnings and computedAt. MCP endpoint: /mcp." }, "servers": [ { "url": "https://contractupgradeexplorer.usefulweb.site" } ], "paths": { "/api/v1/calculate": { "post": { "operationId": "calculate", "summary": "Is this smart contract upgradeable, who controls upgrades, and what changed?", "description": "Reads a contract straight from the chain and identifies its proxy pattern (EIP-1967 transparent, UUPS, beacon, EIP-1167 clone, Safe proxy, legacy ZeppelinOS, EIP-7702 delegated account), the current implementation, who controls upgrades (single key, Safe multisig with threshold, timelock with delay, ProxyAdmin and its owner), the Upgraded/AdminChanged event history, and whether the code is verified on Sourcify. Paste raw bytecode for an offline scan.\n\nMethodology:\n- Storage slots read with eth_getStorageAt: EIP-1967 implementation/admin/beacon (keccak256(\"eip1967.proxy.*\") − 1), EIP-1822 PROXIABLE, the legacy ZeppelinOS implementation/admin slots (keccak256(\"org.zeppelinos.proxy.*\")), and slot 0 for Safe proxies.\n- Bytecode scan (PUSH data skipped): EIP-1167 clone pattern, EIP-7702 delegation designator (0xef0100…), DELEGATECALL/SELFDESTRUCT opcodes, dispatcher selectors (PUSH4 followed by EQ) and EIP-1967 slot constants.\n- Classification: beacon slot set → beacon proxy; admin slot set → transparent; implementation slot set and implementation exposes proxiableUUID() → UUPS; Safe proxy if slot 0 holds a contract and masterCopy() is dispatched.\n- Controller: EOA (single key), Safe (getThreshold/getOwners), TimelockController (getMinDelay), or ProxyAdmin (owner() is analysed one level deep).\n- History: Upgraded / AdminChanged / BeaconUpgraded logs of the proxy via eth_getLogs; public nodes may limit the range, which is reported.", "tags": [ "web3" ], "x-mcp-tool": "contract_upgrade_explorer", "requestBody": { "required": true, "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ContractUpgradeExplorerInput" }, "examples": { "example1": { "summary": "EIP-1167 minimal proxy clone (offline)", "value": { "mode": "bytecode", "chain": "ethereum", "bytecode": "0x363d3d373d3d3d363d73bebebebebebebebebebebebebebebebebebebebe5af43d82803e903d91602b57fd5bf3" } }, "example2": { "summary": "Dispatcher with upgradeTo (offline)", "value": { "mode": "bytecode", "chain": "ethereum", "bytecode": "0x608060405260043610633659cfe61461005757634f1ef28614610060577f360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc54f4" } } } } } }, "responses": { "200": { "description": "Calculation result envelope.", "content": { "application/json": { "schema": { "$ref": "#/components/schemas/ContractUpgradeExplorerResult" } } } }, "400": { "description": "Malformed JSON body.", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "422": { "description": "Invalid input (see errors[]).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } }, "429": { "description": "Rate limit exceeded (see Retry-After).", "content": { "application/problem+json": { "schema": { "$ref": "#/components/schemas/Problem" } } } } } } }, "/api/v1/tool": { "get": { "operationId": "getToolDefinition", "summary": "Inputs, output schema and examples for this tool", "responses": { "200": { "description": "Tool definition.", "content": { "application/json": { "schema": { "type": "object" } } } } } } } }, "components": { "schemas": { "Problem": { "type": "object", "description": "RFC 9457 problem details. 422 responses include per-field `errors`.", "required": [ "type", "title", "status", "detail" ], "properties": { "type": { "type": "string" }, "title": { "type": "string" }, "status": { "type": "integer" }, "detail": { "type": "string" }, "code": { "type": "string" }, "errors": { "type": "array", "items": { "type": "object", "required": [ "field", "message" ], "properties": { "field": { "type": "string" }, "message": { "type": "string" } } } } } }, "ContractUpgradeExplorerInput": { "type": "object", "additionalProperties": false, "properties": { "mode": { "title": "What do you have?", "type": "string", "enum": [ "lookup", "bytecode" ], "default": "lookup" }, "chain": { "title": "Chain", "type": "string", "enum": [ "ethereum", "base", "arbitrum", "optimism", "polygon", "avalanche", "bsc" ], "default": "ethereum" }, "address": { "title": "Contract address", "type": "string", "maxLength": 42 }, "bytecode": { "title": "Runtime bytecode", "type": "string", "maxLength": 100000 } }, "required": [] }, "ContractUpgradeExplorerResult": { "type": "object", "additionalProperties": false, "required": [ "schemaVersion", "tool", "computedAt", "inputs", "summary", "result", "units", "assumptions", "sources", "warnings", "presentation", "links" ], "properties": { "schemaVersion": { "type": "string", "const": "1.0" }, "tool": { "type": "object", "additionalProperties": false, "required": [ "id", "name", "version" ], "properties": { "id": { "type": "string" }, "name": { "type": "string" }, "version": { "type": "string" } } }, "computedAt": { "type": "string", "format": "date-time" }, "inputs": { "type": "object", "description": "Normalised inputs actually used, including applied defaults." }, "summary": { "type": "string" }, "result": { "type": "object", "additionalProperties": false, "required": [ "mode", "chain", "address", "proxyType", "upgradeable", "implementation", "beacon", "admin", "history", "verification", "bytecode", "findings", "graph" ], "properties": { "mode": { "type": "string", "enum": [ "lookup", "bytecode" ] }, "chain": { "type": "string" }, "address": { "type": [ "string", "null" ] }, "proxyType": { "type": "string", "enum": [ "eip1967-transparent", "eip1967-uups", "eip1967-beacon", "eip1167-minimal-proxy", "safe-proxy", "legacy-zeppelinos", "eip7702-delegated-eoa", "eoa", "not-a-proxy", "unknown-delegatecall" ] }, "upgradeable": { "type": "string", "enum": [ "yes", "no", "unknown" ] }, "implementation": { "type": [ "string", "null" ] }, "beacon": { "type": [ "string", "null" ] }, "admin": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "address", "kind", "safe", "timelockDelaySeconds", "owner" ], "properties": { "address": { "type": "string" }, "kind": { "type": "string" }, "owner": { "type": [ "string", "null" ] }, "timelockDelaySeconds": { "type": [ "integer", "null" ] }, "safe": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "threshold", "owners" ], "properties": { "threshold": { "type": "integer" }, "owners": { "type": "array", "items": { "type": "string" } } } } } }, "history": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "events", "complete", "range" ], "properties": { "complete": { "type": "boolean" }, "range": { "type": "string" }, "events": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "kind", "blockNumber", "txHash", "value", "timestamp" ], "properties": { "kind": { "type": "string" }, "blockNumber": { "type": "integer" }, "txHash": { "type": "string" }, "value": { "type": "string" }, "timestamp": { "type": [ "string", "null" ] } } } } } }, "verification": { "type": "object", "additionalProperties": false, "required": [ "proxy", "implementation" ], "properties": { "proxy": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "name", "match" ], "properties": { "name": { "type": [ "string", "null" ] }, "match": { "type": [ "string", "null" ] } } }, "implementation": { "type": [ "object", "null" ], "additionalProperties": false, "required": [ "name", "match" ], "properties": { "name": { "type": [ "string", "null" ] }, "match": { "type": [ "string", "null" ] } } } } }, "bytecode": { "type": "object", "additionalProperties": false, "required": [ "size", "minimalProxyTarget", "eip7702Delegate", "hasDelegatecall", "hasSelfdestruct", "selectors", "upgradeFunctions", "referencesSlots" ], "properties": { "size": { "type": "integer" }, "minimalProxyTarget": { "type": [ "string", "null" ] }, "eip7702Delegate": { "type": [ "string", "null" ] }, "hasDelegatecall": { "type": "boolean" }, "hasSelfdestruct": { "type": "boolean" }, "selectors": { "type": "array", "items": { "type": "string" } }, "upgradeFunctions": { "type": "array", "items": { "type": "string" } }, "referencesSlots": { "type": "array", "items": { "type": "string" } } } }, "findings": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "severity", "finding" ], "properties": { "severity": { "type": "string", "enum": [ "high", "medium", "low", "info" ] }, "finding": { "type": "string" } } } }, "graph": { "type": "object", "additionalProperties": false, "required": [ "nodes", "edges" ], "properties": { "nodes": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "id", "kind", "label" ], "properties": { "id": { "type": "string" }, "kind": { "type": "string" }, "label": { "type": "string" } } } }, "edges": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "from", "to", "relation" ], "properties": { "from": { "type": "string" }, "to": { "type": "string" }, "relation": { "type": "string" } } } } } } } }, "units": { "type": "object", "additionalProperties": { "type": "string" } }, "assumptions": { "type": "array", "items": { "type": "string" } }, "sources": { "type": "array", "items": { "type": "object", "additionalProperties": false, "required": [ "title" ], "properties": { "title": { "type": "string" }, "url": { "type": "string" }, "publisher": { "type": "string" }, "retrievedAt": { "type": "string" }, "note": { "type": "string" } } } }, "warnings": { "type": "array", "items": { "type": "string" } }, "presentation": { "type": "array", "items": { "type": "object" }, "description": "Display blocks used by the human page (same data)." }, "links": { "type": "object", "additionalProperties": false, "required": [ "human", "api", "openapi", "methodology" ], "properties": { "human": { "type": "string", "format": "uri" }, "api": { "type": "string", "format": "uri" }, "openapi": { "type": "string", "format": "uri" }, "methodology": { "type": "string", "format": "uri" } } } } } } } }