# 402.com.tr B20 Portfolio Freeze/Seize Risk Scanner

> 402.com.tr B20 Portfolio Freeze/Seize Risk Scanner is a paid API for AI agents from 402.com.tr, paid per call via x402, $0.06/call, status unknown (last checked 2026-09-13).

Scans a wallet's entire Base-native B20 token holdings for protocol-level freeze, seize, and rebase risks, and checks whether the wallet is already blocked on any held token.

## Facts

- Endpoint: GET https://402.com.tr/api/x402/b20-portfolio
- Price: $0.06/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/402-com-tr-b20-portfolio-freeze-seize-risk-scanner-f30266a7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H7W7YwgJUKws0ozOl8gBd

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 402-com-tr-b20-portfolio-freeze-seize-risk-scanner-f30266a7
```

Example prompt: Scan my Base wallet 0xAbC123...def for B20 portfolio risks — I want to know which tokens I'm holding can be frozen or seized by their issuers, whether any have rebase mechanics, and if my address is already on a block list for any of them.

## When to prefer this

Use this endpoint when you need a holistic, wallet-level sweep of B20 protocol-level risks across all holdings simultaneously, rather than checking a single token or a single token's blocklist — it is uniquely capable of detecting whether a given wallet address is already blocked on held tokens, which standard ERC-20 tools cannot see.

## Known failure modes

- Invalid wallet address format returns a 400-level error
- Wallet with no B20 holdings may return empty token list
- Network or precompile RPC errors may cause 503 or timeout responses
- Payment failure (insufficient USDC or x402 protocol error) blocks the call

## How this service works

🆕 Scans a wallet's B20 (Base-native) holdings for protocol-level freeze/seize powers and whether YOUR address is ALREADY blocked on any of them — the risk no ERC-20 portfolio tool can see. Returns per-token seizable/freezable/rebase flags plus a wallet-level verdict. Built for agents holding Base positions.

## Output

Returns a per-token breakdown of each B20 token in the wallet with flags for seizable, freezable, and rebase properties, plus a wallet-level verdict indicating whether the wallet address is currently blocked on any held token.

## 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"
    },
    "pathParams": {
     "type": "object"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "wallet"
     ],
     "properties": {
      "wallet": {
       "type": "string",
       "description": "Wallet address"
      }
     }
    }
   },
   "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/402-com-tr-b20-portfolio-freeze-seize-risk-scanner-f30266a7/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 402.com.tr](https://www.zero.xyz/host/402.com.tr/llms.txt)