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QuietSignal Token Facts
x402
QuietSignal Token Facts 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 2026-10-12).
Fetches read-only ERC-20 token metadata and contract facts for a given Base network contract address.
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 containing the Base network address queried, network identifier (eip155:8453), whether the address is a contract, and ERC-20 fields including name, symbol, decimals, and total supply (any of which may be null if not applicable or unavailable), plus a schema version and a read-only disclaimer.
Example use cases
Verify unknown token contract
“I just received some tokens at 0x4200000000000000000000000000000000000006 on Base — can you pull the token name, symbol, and decimals so I can figure out what it is?”
DeFi due diligence check
“Before I interact with this Base contract at 0x2Ae3F1Ec7F1F5012CFEab0185bfc7aa3cf0DEc22, can you fetch the on-chain ERC-20 facts like name, symbol, total supply, and confirm it's actually a deployed contract?”
Populate token metadata in app
“I need the ERC-20 metadata for the Base address 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA — give me the name, symbol, and decimal places so I can display it correctly in my app.”
Technical details
Endpoint
GEThttps://83-29-153-50.sslip.io/v1/token-facts?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need lightweight, read-only ERC-20 token metadata for a specific Base mainnet contract address and want to pay per-request with USDC rather than manage API keys. Prefer this over block explorer scraping when you need machine-readable structured JSON, and over full node RPC calls when you want a simple HTTP GET with no Web3 library dependency. Best suited for agents that need to verify or display token facts quickly without indexing or historical data requirements.
Side effects
- Address not provided — returns validation error requiring the 'address' query parameter
- Address is not a deployed contract — returns is_contract: false with null ERC-20 fields
- Address is valid but not an ERC-20 token — ERC-20 fields (name, symbol, decimals, total_supply) return null
- Payment not provided — HTTP 402 response requiring USDC payment over x402 protocol on Base
- Invalid Base address format — likely returns a 400 or validation error
- Network connectivity or RPC issues — may return 5xx error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"erc20": {
"name": null,
"symbol": null,
"decimals": null,
"total_supply": null
},
"schema": "base-token-facts/v1",
"address": "0x0000000000000000000000000000000000000000",
"network": "eip155:8453",
"disclaimer": "Read-only public contract and ERC-20 metadata facts; not a security or investment assessment.",
"is_contract": false
}
}Tags
x402
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