# Vextorium ERC-1155 Balance Lookup

> Vextorium ERC-1155 Balance Lookup is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-19).

Returns the ERC-1155 token balance held by a wallet address for a specific token ID on a given EVM chain

## Facts

- Endpoint: POST https://api.vextorium.com/v1/erc1155-balance?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/vextorium-erc-1155-balance-lookup-06c6ed77
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LYm70H7hX8ItysYB-OLWX

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-erc-1155-balance-lookup-06c6ed77 -d '<json body>'
```

Example prompt: Check the ERC-1155 balance for wallet 0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf on the contract 0x76BE3b62873462d2142405439777e971754E8E77 for token ID 10373 on Ethereum.

## When to prefer this

Use this endpoint when you need to check the balance of a specific ERC-1155 token ID for a specific wallet on a supported EVM chain (Base, Ethereum, Arbitrum, Optimism, Polygon, BNB, Avalanche, Gnosis, Linea, Scroll, Sonic, Unichain). It is ideal for ERC-1155 multi-token standard contracts (gaming items, semi-fungible tokens, multi-edition NFTs) where each token ID can have fractional or multiple holdings per wallet — unlike ERC-721 which is always 0 or 1.

## Known failure modes

- Invalid wallet address format returns an error or null result
- Invalid or undeployed contract address yields a zero balance or error
- Unsupported network name returns a validation error
- Missing required fields (address, contract, token_id) returns a 400-level error
- Token ID not existing on the contract may return amount 0
- Network congestion or RPC issues may cause timeouts

## How this service works

558 pay-per-call data APIs for AI agents: Solana and EVM on-chain data, tokenized stocks, DeFi, Hyperliquid, economy and official statistics, FX, validation, web and developer tools. Pay in USDC via x402.

## Output

Returns a JSON object with the wallet address, network, contract address, token ID, amount (balance as a number), and the token's metadata URI. A balance of 0 means the wallet does not hold that token.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string"
  },
  "network": {
   "enum": [
    "base",
    "ethereum",
    "arbitrum",
    "optimism",
    "polygon",
    "bnb",
    "avalanche",
    "gnosis",
    "line",
    "scroll",
    "sonic",
    "unichain"
   ],
   "type": "string",
   "description": "Chain (default base)"
  },
  "contract": {
   "type": "string"
  },
  "token_id": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "uri": "https://nftdata.parallelnft.com/api/parallel-alpha",
  "amount": 0,
  "wallet": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
  "network": "ethereum",
  "contract": "0x76BE3b62873462d2142405439777e971754E8E77",
  "token_id": "10373"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/vextorium-erc-1155-balance-lookup-06c6ed77/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)