# Base Token Brief — Symbol, Decimals, Supply, Risk Screen

> Base Token Brief — Symbol, Decimals, Supply, Risk Screen is a paid API for AI agents from heb-utils-x402.hebutils-api.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-17).

Returns a single consolidated summary of an ERC-20 token on Base: metadata (symbol, name, decimals, total supply), optional holder balance, admin-control risk signals (proxy, owner, mint, pause, blacklist, fee setters), and current block number.

## Facts

- Endpoint: GET https://heb-utils-x402.hebutils-api.workers.dev/base-token-brief?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-token-brief-symbol-decimals-supply-risk-screen-b200c625
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cEZhW2lFk4CgmUiZOr-z8

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 base-token-brief-symbol-decimals-supply-risk-screen-b200c625
```

Example prompt: Can you pull a quick brief on the Base token at contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, and also check the balance for my wallet 0xAbC123...? I want to see the symbol, supply, decimals, and any admin-control red flags like mint, pause, or blacklist powers.

## When to prefer this

Choose this endpoint when you need a consolidated on-chain snapshot of a Base ERC-20 token — especially when you would otherwise make 4-5 separate RPC calls for metadata, supply, balance, and risk signals. Ideal for pre-trade due diligence, portfolio dashboards, or agent workflows that need a quick risk screen alongside token fundamentals. Not a substitute for a formal smart contract audit; use for heuristic screening only.

## Known failure modes

- Invalid or non-ERC-20 contract address returns an error or empty metadata
- Non-Base chain address may return incorrect or no data since the endpoint is Base-specific
- Rate limiting or RPC node issues may cause transient failures
- Holder address that is not checksummed or malformed returns an error
- Token with non-standard ABI may cause partial data or missing fields
- Network congestion on Base may slow response

## How this service works

One call for a Base token: symbol, name, decimals, total supply, optional holder balance, admin-control risk screen (proxy, owner, mint, pause, blacklist, fee setters) with headline and signal count, and the current block number. Pass the token contract address and optionally a holder address. Replaces 4-5 separate lookups with one payment. Read-only live on-chain data, heuristic screen, not an audit, not advice.

## Output

A single JSON object containing: token symbol, name, decimals, total supply; optional holder balance if a holder address was provided; admin-control risk flags (proxy, owner, mint, pause, blacklist, fee setters) with a human-readable headline and count of risk signals; and the current block number on Base at time of call.

## 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": [
      "token"
     ],
     "properties": {
      "token": {
       "type": "string",
       "description": "ERC-20 token contract 0x..."
      },
      "holder": {
       "type": "string",
       "description": "Optional holder address 0x..."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-token-brief-symbol-decimals-supply-risk-screen-b200c625/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from heb-utils-x402.hebutils-api.workers.dev](https://www.zero.xyz/host/heb-utils-x402.hebutils-api.workers.dev/llms.txt)