# QuietSignal Token Facts

> 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.

## Facts

- Endpoint: GET https://83-29-153-50.sslip.io/v1/token-facts?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: down
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/quietsignal-token-facts-0850533b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vFNUuo1aDX2pJyLLfI-Y9

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-token-facts-0850533b
```

Example prompt: Can you look up the ERC-20 token facts for the Base contract at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 — I want the name, symbol, decimals, and total supply?

## When to prefer this

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.

## Known failure modes

- 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

## 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.

## 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": {
  "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
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/quietsignal-token-facts-0850533b/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)