Base proxy implementation

$0.01 per call · failed calls are never charged · no account or API key needed

Find the implementation behind a proxy contract on Base: 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.

Run it free (25 free calls) Buy credits by card (from $5) Example result (JSON)

Try it with your own inputs

0x contract address

Uses one of your 25 free calls. Nothing is charged, and a call that fails is not counted.

Inputs

NameTypeDescription
address (required)string0x contract address

Request

Over HTTP, with a card key from /credits:

curl -H "Authorization: Bearer adt_…" "https://agent-data-tools.revmesh2074.workers.dev/base/proxy?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"

Or one of your 25 free calls, no key:

curl "https://agent-data-tools.revmesh2074.workers.dev/base/proxy?address=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&trial=1"

Without a key, the same URL answers 402 Payment Required with x402 and MPP terms, so an agent with a wallet pays per call in USDC (Base, Polygon, Arbitrum or Solana over x402; Base or Tempo over MPP) and retries.

Example result

{
  "chain": "Base",
  "chainId": 8453,
  "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "isProxy": true,
  "kind": "openzeppelin-legacy",
  "implementation": "0x2ce6311ddae708829bc0784c967b7d77d19fd779",
  "admin": "0x…",
  "beacon": null,
  "upgradeable": true
}

From an AI agent (MCP)

Add the MCP server to Claude, Cursor or any MCP client. This tool is base_proxy, and the first 25 successful calls are free:

https://agent-data-tools.revmesh2074.workers.dev/mcp

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