# ERC-20 Token Risk Screener

> ERC-20 Token Risk Screener is a paid API for AI agents from chain.openverbs.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-13).

Performs deterministic on-chain risk analysis of an ERC-20 token by inspecting its bytecode and metadata, flagging dangerous capabilities like blacklist/freeze, owner mint, pausability, and upgradeable proxies with severity scores and a verdict.

## Facts

- Endpoint: POST https://chain.openverbs.com/v1/token-risk
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/erc-20-token-risk-screener-d5e2bd71
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_F3wzla2wMS2cf4tADHe5u

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 erc-20-token-risk-screener-d5e2bd71 -d '<json body>'
```

Example prompt: Before I swap into it, can you run a risk screen on the token at 0x6B175474E89094C44Da98b954EedeAC495271d0F on Ethereum and tell me if it has any dangerous owner privileges, blacklist functions, or mint capabilities?

## When to prefer this

Choose this endpoint when you need a fast, deterministic, no-third-party risk screen of an ERC-20 token derived purely from on-chain bytecode and metadata — ideal when you distrust centralized risk databases, want reproducible results, or need to flag privileged owner capabilities (mint, blacklist, pause, upgrade) before a swap, listing, or portfolio inclusion decision. Prefer alternatives if you need off-chain social signals, liquidity analysis, or holder distribution data.

## Known failure modes

- Invalid or non-checksummed contract address returns a validation error
- Address is an EOA (no bytecode) — flagged as missing code
- Token missing symbol or decimals on-chain — flagged as metadata risk
- Unsupported chain value returns an enum validation error
- RPC endpoint for the target chain is temporarily unavailable — automatic fallback attempted but may still fail
- Token exists on a different chain than specified — returns empty or incorrect data

## How this service works

Deterministic risk screen of an ERC-20 token from on-chain bytecode and metadata, no third-party risk API. Flags privileged or abuse capabilities: blacklist/freeze, owner mint, pausable transfers, upgradeable proxy and a privileged owner, plus tokens missing symbol/decimals or code. Returns each flag with a severity, a 0-100 score and a verdict. Reads live on-chain data with automatic endpoint fallback.

## Output

Returns a structured report containing each detected risk flag (e.g. blacklist/freeze, owner mint, pausable transfers, upgradeable proxy, privileged owner, missing symbol/decimals, no bytecode) along with a severity level per flag, an aggregate 0-100 risk score, and an overall verdict indicating whether the token is safe, suspicious, or high-risk.

## Request schema (JSON Schema)

```json
{
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "type": "object",
 "properties": {
  "input": {
   "type": "object",
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "type": "string",
     "enum": [
      "POST"
     ]
    },
    "bodyType": {
     "type": "string",
     "enum": [
      "json",
      "form-data",
      "text"
     ]
    },
    "body": {
     "type": "object",
     "properties": {
      "address": {
       "type": "string",
       "pattern": "^0x[0-9a-fA-F]{40}$",
       "description": "ERC-20 token contract address."
      },
      "chain": {
       "type": "string",
       "enum": [
        "ethereum",
        "base",
        "arbitrum",
        "optimism",
        "polygon"
       ],
       "description": "EVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default \"ethereum\"."
      }
     },
     "additionalProperties": false
    }
   },
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "additionalProperties": false
  }
 },
 "required": [
  "input"
 ]
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/erc-20-token-risk-screener-d5e2bd71/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from chain.openverbs.com](https://www.zero.xyz/host/chain.openverbs.com/llms.txt)