# Mint Intel: Base Proxy Contract Detection

> Mint Intel: Base Proxy Contract Detection is a paid API for AI agents from mintintel.35-171-220-195.sslip.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-31).

Detects upgradeable proxy patterns on Base chain and returns the implementation, admin, and beacon addresses behind a given proxy contract address.

## Facts

- Endpoint: GET https://mintintel.35-171-220-195.sslip.io/v1/base/proxy/:address?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mint-intel-base-proxy-contract-detection-8401626d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7mUgEWmYiEwHuByN-YKNi

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mint-intel-base-proxy-contract-detection-8401626d
```

Example prompt: Check if the Base contract at 0x4200000000000000000000000000000000000010 is a proxy and tell me what implementation address is behind it.

## When to prefer this

Use this endpoint when you need to determine whether a Base chain contract is a proxy and resolve its underlying implementation, admin, or beacon address. It covers all major proxy standards (EIP-1967, UUPS, beacon, EIP-1167, EIP-1822, Safe, EIP-7702, legacy OpenZeppelin) in a single call. Prefer this over raw eth_getStorageAt calls when you want a high-level answer without manually computing storage slots for each proxy standard.

## Known failure modes

- Address is not a contract (EOA) — returns isProxy: false with no implementation data
- Invalid or malformed address format — returns 400 error
- Contract exists but uses no recognized proxy pattern — returns isProxy: false
- RPC node unavailable or Base network issues — returns 5xx error
- Address has no storage at known proxy slots — treated as non-proxy

## How this service works

Detect upgradeable proxies on Base via eth_getStorageAt - EIP-1967 (transparent, UUPS, beacon), legacy OpenZeppelin (zos), EIP-1822, Safe, EIP-1167 clones and EIP-7702 delegation - and return the implementation, admin and beacon addresses behind the proxy.

## Output

Returns the contract address queried, a boolean indicating whether it is a proxy, the detected proxy standard (e.g. EIP-1967 transparent, UUPS, beacon, EIP-1167, EIP-1822, Safe, EIP-7702, OpenZeppelin zos), and the resolved implementation address, admin address, and/or beacon address as applicable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "pathParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "0x-prefixed 20-byte EVM address"
      }
     },
     "additionalProperties": false
    },
    "queryParams": {
     "type": "object",
     "properties": {},
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "address",
      "isProxy"
     ],
     "properties": {
      "address": {
       "type": "string"
      },
      "isProxy": {
       "type": "boolean"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mint-intel-base-proxy-contract-detection-8401626d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mintintel.35-171-220-195.sslip.io](https://www.zero.xyz/host/mintintel.35-171-220-195.sslip.io/llms.txt)