# Vextorium EVM Token Balance

> Vextorium EVM Token Balance is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-11).

Returns the token balance of a wallet address for an ERC-20 token on a specified EVM-compatible chain

## Facts

- Endpoint: POST https://api.vextorium.com/v1/evm-token-balance?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-evm-token-balance-50537bfe
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QczO8pn3kWQQAGD5BsdAB

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 vextorium-evm-token-balance-50537bfe -d '<json body>'
```

Example prompt: Check how much USDC the wallet 0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf holds on Base — the USDC token contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.

## When to prefer this

Use this endpoint when you need the current on-chain ERC-20 token balance for a specific wallet on a supported EVM chain (Base, Ethereum, Arbitrum, Optimism, Polygon, BNB, Avalanche, Gnosis, Linea, Scroll, Sonic, Unichain). Prefer it over Etherscan or Alchemy direct calls when you need a simple pay-per-use API without API key management. Ideal for AI agents needing balance checks as part of a DeFi workflow, pre-trade validation, or portfolio monitoring.

## Known failure modes

- Invalid wallet address format returns an error or null balance
- Invalid or non-ERC-20 token contract address returns null/empty result
- Unsupported network name returns a validation error
- Token not deployed on the specified network returns null balance
- RPC node timeout or upstream chain unavailability causes a 5xx error
- Malformed request body (missing required fields) returns a 400-level error

## How this service works

Balance of one ERC-20 token in a wallet with symbol and decimals. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.

## Output

Returns a JSON object with the token name, symbol, contract address, wallet address, human-readable balance (float), raw gross balance (string, without decimals applied), number of decimals, and the network queried.

## 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",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "required": [
      "address",
      "token"
     ],
     "properties": {
      "token": {
       "type": "string"
      },
      "address": {
       "type": "string"
      },
      "network": {
       "enum": [
        "base",
        "ethereum",
        "arbitrum",
        "optimism",
        "polygon",
        "bnb",
        "avalanche",
        "gnosis",
        "line",
        "scroll",
        "sonic",
        "unichain"
       ],
       "type": "string",
       "description": "Chain (default base)"
      }
     }
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": [
      "object",
      "null"
     ],
     "properties": {
      "name": {
       "type": [
        "string",
        "null"
       ]
      },
      "token": {
       "type": [
        "string",
        "null"
       ]
      },
      "symbol": {
       "type": [
        "string",
        "null"
       ]
      },
      "wallet": {
       "type": [
        "string",
        "null"
       ]
      },
      "balance": {
       "type": [
        "number",
        "null"
       ]
      },
      "network": {
       "type": [
        "string",
        "null"
       ]
      },
      "decimals": {
       "type": [
        "number",
        "null"
       ]
      },
      "gross_balance": {
       "type": [
        "string",
        "null"
       ]
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "name": "USD Coin",
  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "symbol": "USDC",
  "wallet": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
  "balance": 1.541325,
  "network": "base",
  "decimals": 6,
  "gross_balance": "1541325"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-evm-token-balance-50537bfe/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.vextorium.com](https://www.zero.xyz/host/api.vextorium.com/llms.txt)