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QuietSignal Contract Controls Inspector
x402
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.
Price / call$0.01
Success—
StatusDown
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.
Example use cases
Verify proxy upgrade risk before investing
“Before I interact with this DeFi protocol on Base at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, can you check if it's an upgradeable proxy and who controls the implementation?”
Audit ownership of a deployed contract
“I just deployed a contract on Base at 0x1234567890abcdef1234567890abcdef12345678 — can you confirm who the owner is and whether the contract is actually live on-chain?”
Check if a protocol is paused during incident
“There are rumors that the Base lending protocol at 0x3fC91A3afd70395Cd496C647d5a6CC9D4B2b7FAD has been emergency-paused — can you verify if the paused flag is currently set?”
Technical details
Endpoint
GEThttps://83-29-153-50.sslip.io/v1/contract-controlsWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"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
}
}Tags
x402
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