Tool detail

Oblique Markets

Detects whether a contract is an upgradeable proxy (EIP-1967, beacon, UUPS, minimal, legacy, Safe, or none) and returns its implementation, admin, and beacon addresses.

Categories: Onchain data

Use when

check whether a contract address is an upgradeable proxy and find its implementation
read specific raw storage slots on a known proxy contract

Not for

not a general contract-storage reader - proxy detection plus up to 4 extra slots only
not for arbitrary chains - base, ethereum, optimism, arbitrum, or polygon only

Inputs

GET query: address (0x contract address, required); chain (enum name or id, optional, default base), block (string, optional, default latest), slots (up to 4 items, optional).

Admitted input schema

{
  "type": "object",
  "properties": {
    "address": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "Contract address to inspect, 0x plus 40 hex characters (any case)."
    },
    "block": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "description": "'latest' (default) or a decimal block number; explicit blocks are immutable and cached longer."
    },
    "chain": {
      "type": "string",
      "minLength": 0,
      "maxLength": 4096,
      "enum": [
        "base",
        "ethereum",
        "optimism",
        "arbitrum",
        "polygon",
        "8453",
        "1",
        "10",
        "42161",
        "137"
      ],
      "description": "Chain name (base, ethereum, optimism, arbitrum, polygon) or chain id (8453, 1, 10, 42161, 137). Default base."
    },
    "slots": {
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 0,
        "maxLength": 4096
      },
      "minItems": 0,
      "maxItems": 100,
      "description": "Up to 4 extra raw storage slots to read and decode: each a 0x bytes32 or a decimal slot number. GET accepts a comma-separated list."
    }
  },
  "required": [
    "address"
  ],
  "additionalProperties": false
}

Endpoint

Method: GET
URL: https://api.oblique.markets/api/v1/paid/proxy-implementation

Payment

Protocol: x402
Listed price: 0.003 USDC per call on Base
Payment method: exact
Network: eip155:8453
Asset: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Listed terms are catalog metadata. The caller supplies inputs and calls the tool outside Onelayer. If payment is required, the caller uses a compatible wallet to pay.

Source

Directory: Coinbase x402 Bazaar
Record: GET https://api.oblique.markets/api/v1/paid/proxy-implementation
Retrieved: 2026-09-30T20:37:07.382Z
Catalog file SHA-256: 6837ccddf886f0007cf3727ea9d27faaa5047b51b4f425345c554ce1c271a524
Catalog built: 2026-09-30T22:31:58.034Z