Use when an agent asks if a contract is an upgradeable proxy and where its code is
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.
3000 (raw units)
price
5
calls / 30d
3
unique payers
2026-09-14
updated
Provider
api.oblique.markets · discovered, not yet claimed by its owner
Payment (x402 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
}
]Output schema
{
"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"
}
}
}Use it
curl
curl "https://api.oblique.markets/api/v1/paid/proxy-implementation" # -> 402 Payment Required, accepts[] lists how to pay # retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://api.oblique.markets/api/v1/paid/proxy-implementation");
if (res.status === 402) {
const { accepts } = await res.json();
// pay one of accepts[] via an x402 client, then retry with the payment header
}Python
import httpx
res = httpx.get("https://api.oblique.markets/api/v1/paid/proxy-implementation")
if res.status_code == 402:
accepts = res.json()["accepts"]
# pay one of accepts[] via an x402 client, then retry with the payment headerMachine-readable
Everything on this page is also available as clean JSON at /resources/536.json, and this resource appears in /discovery/resources and /discovery/search.