# QuietSignal Contract Controls Inspector

> QuietSignal Contract Controls Inspector is a paid API for AI agents from 83-29-153-50.sslip.io, paid per call via x402, $0.01/call, status down (last checked 2026-09-15).

Fetches machine-readable control and upgradeability facts for a given Base smart contract address, including proxy implementation, owner, and pause state.

## Facts

- Endpoint: GET https://83-29-153-50.sslip.io/v1/contract-controls
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quietsignal-contract-controls-inspector-825f7226
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xKym0aVzTi7B98GW33n1E

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 quietsignal-contract-controls-inspector-825f7226
```

Example prompt: Can you check the contract controls for 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Base — I want to know if it's behind a proxy, who owns it, and whether it's currently paused?

## When to prefer this

Choose this endpoint when you need a lightweight, read-only factual snapshot of a Base smart contract's control structure — specifically proxy upgradeability, ownership, and pause state — without running your own RPC node or indexer. Ideal for pre-interaction due diligence on Base contracts, automated security checks in agent workflows, or quickly auditing whether a contract is upgradeable or admin-controlled.

## Known failure modes

- Address not a contract: is_contract returns false, proxy and owner fields respond false/null
- Invalid or malformed address: request may fail or return empty results
- Contract does not implement standard owner()/paused() interfaces: responded fields return false
- Network congestion or RPC issues may delay or fail the lookup
- Rate limits or payment failures (HTTP 402) if USDC payment is not properly attached

## How this service works

QuietSignal Public Data: independent, read-only rollup, wallet, opportunity, and developer-data facts for agents, paid per request with USDC over HTTP 402 on Base.

## Output

Returns a JSON object with the contract address, network (eip155:8453 for Base), whether the address is a contract, EIP-1967 proxy implementation details (address and presence flag), and callability data including owner address and pause state. Includes a disclaimer that results are observed markers only and not a security or investment assessment.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "address": {
       "type": "string",
       "description": "Public Base contract address to inspect"
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "schema": "base-contract-controls/v1",
  "address": "0x0000000000000000000000000000000000000000",
  "eip1967": {
   "implementation": {
    "address": null,
    "present": false
   }
  },
  "network": "eip155:8453",
  "disclaimer": "Observed markers only; not a security or investment assessment.",
  "callability": {
   "owner": {
    "address": null,
    "responded": false
   },
   "paused": {
    "value": null,
    "responded": false
   }
  },
  "is_contract": false
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quietsignal-contract-controls-inspector-825f7226/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 83-29-153-50.sslip.io](https://www.zero.xyz/host/83-29-153-50.sslip.io/llms.txt)