{
  "x402Version": 2,
  "id": 536,
  "slug": "536",
  "resource": "https://api.oblique.markets/api/v1/paid/proxy-implementation",
  "description": "Use when an agent asks if a contract is an upgradeable proxy and where its code is. Returns the standard (EIP-1967, beacon, UUPS, minimal, legacy, Safe, none), implementation, admin, beacon, slots and block read on Base, Ethereum, Optimism, Arbitrum or Polygon; 4 extra slots decoded. $0.003.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x970007590aCC5C938cd51345B17AF51B1B40D3Ab",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "3000",
      "maxTimeoutSeconds": 60
    },
    {
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "GYyTRmt317JafPHXPnM54Fsvsma5GnS9wm6qGMqaykdS",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "amount": "3000",
      "maxTimeoutSeconds": 60
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
          },
          "type": "http"
        },
        "output": {
          "example": {
            "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "admin": null,
            "beacon": null,
            "block_number": 40203311,
            "block_tag": "latest",
            "chain": "base",
            "chain_id": 8453,
            "extra_slots": [
              {
                "as_address": null,
                "as_bool": false,
                "as_uint256": "0",
                "raw": "0x0000000000000000000000000000000000000000000000000000000000000000",
                "slot": "0x0000000000000000000000000000000000000000000000000000000000000000"
              }
            ],
            "freshness": {
              "cache": "miss",
              "cache_age_seconds": 0,
              "served_at": "2026-09-12T01:30:00.120Z",
              "ttl_seconds": 30
            },
            "implementation": "0x2Ce6311ddAE708829bc0784C967b7d77D19FD779",
            "implementation_has_code": true,
            "implementation_name": "FiatTokenV2_2",
            "is_contract": true,
            "is_proxy": true,
            "proxy_name": "FiatTokenProxy",
            "read_at": "2026-09-12T01:30:00.000Z",
            "receipt": {
              "payer": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
              "payment_network": "eip155:8453",
              "sku": "proxy-implementation"
            },
            "rpc": {
              "calls": 9,
              "endpoint_class": "public",
              "hosts": [
                "mainnet.base.org"
              ]
            },
            "slots_read": [
              {
                "label": "eip1967.implementation",
                "raw": "0x0000000000000000000000000000000000000000000000000000000000000000",
                "slot": "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"
              },
              {
                "label": "eip1967.admin",
                "raw": "0x0000000000000000000000000000000000000000000000000000000000000000",
                "slot": "0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103"
              }
            ],
            "source": "public-rpc+explorer",
            "standard": "oz-legacy"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "queryParams": {
                "properties": {
                  "address": {
                    "description": "Contract address to inspect, 0x plus 40 hex characters (any case).",
                    "type": "string"
                  },
                  "block": {
                    "description": "'latest' (default) or a decimal block number; explicit blocks are immutable and cached longer.",
                    "type": "string"
                  },
                  "chain": {
                    "description": "Chain name (base, ethereum, optimism, arbitrum, polygon) or chain id (8453, 1, 10, 42161, 137). Default base.",
                    "enum": [
                      "base",
                      "ethereum",
                      "optimism",
                      "arbitrum",
                      "polygon",
                      "8453",
                      "1",
                      "10",
                      "42161",
                      "137"
                    ],
                    "type": "string"
                  },
                  "slots": {
                    "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.",
                    "items": {
                      "type": "string"
                    },
                    "type": "array"
                  }
                },
                "required": [
                  "address"
                ],
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "address": {
                "type": "string"
              },
              "admin": {
                "type": "null"
              },
              "beacon": {
                "type": "null"
              },
              "block_number": {
                "type": "integer"
              },
              "block_tag": {
                "type": "string"
              },
              "chain": {
                "type": "string"
              },
              "chain_id": {
                "type": "integer"
              },
              "extra_slots": {
                "items": {
                  "properties": {
                    "as_address": {
                      "type": "null"
                    },
                    "as_bool": {
                      "type": "boolean"
                    },
                    "as_uint256": {
                      "type": "string"
                    },
                    "raw": {
                      "type": "string"
                    },
                    "slot": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": "array"
              },
              "freshness": {
                "properties": {
                  "cache": {
                    "type": "string"
                  },
                  "cache_age_seconds": {
                    "type": "integer"
                  },
                  "served_at": {
                    "type": "string"
                  },
                  "ttl_seconds": {
                    "type": "integer"
                  }
                },
                "type": "object"
              },
              "implementation": {
                "type": "string"
              },
              "implementation_has_code": {
                "type": "boolean"
              },
              "implementation_name": {
                "type": "string"
              },
              "is_contract": {
                "type": "boolean"
              },
              "is_proxy": {
                "type": "boolean"
              },
              "proxy_name": {
                "type": "string"
              },
              "read_at": {
                "type": "string"
              },
              "receipt": {
                "properties": {
                  "payer": {
                    "type": "string"
                  },
                  "payment_network": {
                    "type": "string"
                  },
                  "sku": {
                    "type": "string"
                  }
                },
                "type": "object"
              },
              "rpc": {
                "properties": {
                  "calls": {
                    "type": "integer"
                  },
                  "endpoint_class": {
                    "type": "string"
                  },
                  "hosts": {
                    "items": {
                      "type": "string"
                    },
                    "type": "array"
                  }
                },
                "type": "object"
              },
              "slots_read": {
                "items": {
                  "properties": {
                    "label": {
                      "type": "string"
                    },
                    "raw": {
                      "type": "string"
                    },
                    "slot": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": "array"
              },
              "source": {
                "type": "string"
              },
              "standard": {
                "type": "string"
              }
            },
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "api.oblique.markets",
  "lastUpdated": "2026-09-14T06:49:47.972Z",
  "quality": {
    "calls30d": 5,
    "uniquePayers30d": 3,
    "lastCalledAt": "2026-09-14T06:49:47.856Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.oblique.markets",
    "manifest_name": "api.oblique.markets",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}