# Arbitrum Proxy Implementation Lookup

> Arbitrum Proxy Implementation Lookup is a paid API for AI agents from agent-data-tools.revmesh2074.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-24).

Detects and identifies the proxy pattern and underlying implementation contract behind any proxy contract on Arbitrum One by reading EIP-1967, EIP-1822, EIP-1167, and OpenZeppelin proxy storage slots.

## Facts

- Endpoint: GET https://agent-data-tools.revmesh2074.workers.dev/arb/proxy?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-24
- Activations on Zero: 0
- Provider: agent-data-tools.revmesh2074.workers.dev
- Website: https://agent-data-tools.revmesh2074.workers.dev
- Canonical page: https://www.zero.xyz/c/agent-data-tools-revmesh2074-workers-dev-arbitrum-proxy-2edfa9b4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qedu5v-lnP-Eg1FQqgAMo

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 agent-data-tools-revmesh2074-workers-dev-arbitrum-proxy-2edfa9b4
```

Example prompt: Can you check if 0x912CE59144191C1204E64559FE8253a0e49E6548 on Arbitrum One is a proxy contract, and if so, what's the actual implementation address behind it?

## When to prefer this

Use this endpoint when you specifically need to resolve proxy contract relationships on Arbitrum One before trusting, auditing, or ABI-decoding a contract. Prefer this over generic Ethereum proxy tools when the target is on Arbitrum One (chainId 42161). For a full security risk verdict, pair with or prefer contract_risk; for other chains use the matching Optimism or Polygon proxy endpoints from the same provider.

## Known failure modes

- 400 Bad Request if the address is malformed or not a valid 0x hex address (not charged)
- 404 Not Found if the address has no deployed contract code on Arbitrum One (not charged)
- May return isProxy: false with no implementation if the contract exists but is not a proxy
- Beacon or admin fields may be null if not applicable to the detected proxy kind

## How this service works

Find the implementation behind a proxy contract on Arbitrum One: reads the EIP-1967 implementation, beacon and admin slots, EIP-1822 (UUPS), the older OpenZeppelin layout and EIP-1167 minimal-proxy bytecode, and names the kind found. Use before trusting or decoding a contract whose code can be swapped by its admin; for a fuller risk verdict use contract_risk. A malformed address is 400; an address without code is 404, both uncharged.

## Output

Returns a JSON object with: isProxy (boolean indicating if proxy was detected), kind (string naming the proxy pattern, e.g. 'EIP-1967', 'UUPS', 'Minimal Proxy'), implementation (address of the logic contract), admin (address of the proxy admin if applicable), beacon (beacon address if applicable), upgradeable (boolean), chain ('arbitrum-one'), and chainId (42161).

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "address"
 ],
 "properties": {
  "address": {
   "type": "string",
   "description": "0x contract address"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "kind": {
   "type": "string"
  },
  "admin": {
   "type": "string"
  },
  "chain": {
   "type": "string"
  },
  "beacon": {},
  "address": {
   "type": "string"
  },
  "chainId": {
   "type": "number"
  },
  "isProxy": {
   "type": "boolean"
  },
  "upgradeable": {
   "type": "boolean"
  },
  "implementation": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agent-data-tools-revmesh2074-workers-dev-arbitrum-proxy-2edfa9b4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agent-data-tools.revmesh2074.workers.dev](https://www.zero.xyz/host/agent-data-tools.revmesh2074.workers.dev/llms.txt)