# ERC-1155 Token Balance & URI Lookup (Multi-Chain)

> ERC-1155 Token Balance & URI Lookup (Multi-Chain) is a paid API for AI agents from api.vextorium.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-18).

Returns the number of copies of a specific ERC-1155 token ID held by a wallet address, plus the token URI, across 12 supported blockchains.

## Facts

- Endpoint: POST https://api.vextorium.com/erc1155-saldo-pago?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/erc-1155-token-balance-uri-lookup-multi-chain-3b3d8e03
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0v_uvDXdXLmlZQCo4X781

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-1155-token-balance-uri-lookup-multi-chain-3b3d8e03 -d '<json body>'
```

Example prompt: How many copies of ERC-1155 token ID 10373 does wallet 0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf hold on the contract 0x76BE3b62873462d2142405439777e971754E8E77 on Ethereum, and what's the token URI?

## When to prefer this

Use this endpoint when you need to check ERC-1155 multi-edition NFT or gaming token balances across 12 major EVM chains in a single API call, and also want the token's metadata URI in the same response. Prefer this over a generic blockchain RPC call when you need a hosted, multi-chain solution without managing your own node infrastructure, and when the $0.003 per-call cost is acceptable.

## Known failure modes

- Invalid wallet address format returns null or error
- Unsupported chain or misspelled chain enum returns an error
- Contract address is not an ERC-1155 contract — balance may return null or unexpected result
- Token ID does not exist on the contract — cantidad returns 0
- Token URI is null if the contract does not implement the URI function
- Network timeouts on RPC calls for less common chains like Gnosis or Unichain

## How this service works

How many copies of an ERC-1155 token id a wallet holds (balanceOf), with the token URI. Works on Base, Ethereum, Arbitrum, Optimism, Polygon, BNB Chain, Avalanche, Gnosis, Linea, Scroll, Sonic and Unichain.

## Output

Returns a JSON object containing the chain name (red), the wallet address (wallet), the contract address (contrato), the queried token ID (token_id), the number of tokens held (cantidad, as a number), and the token metadata URI (uri). All fields can be null if data is unavailable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "red": {
   "enum": [
    "base",
    "ethereum",
    "arbitrum",
    "optimism",
    "polygon",
    "bnb",
    "avalanche",
    "gnosis",
    "linea",
    "scroll",
    "sonic",
    "unichain"
   ],
   "type": "string",
   "description": "Chain (default base)"
  },
  "contrato": {
   "type": "string"
  },
  "token_id": {
   "type": "string"
  },
  "direccion": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/erc-1155-token-balance-uri-lookup-multi-chain-3b3d8e03/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)