# Free Asset Radar x402 – ERC-1155 Balance Lookup

> Free Asset Radar x402 – ERC-1155 Balance Lookup is a paid API for AI agents from free-asset-radar-x402.besenok2018.workers.dev, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-17).

Returns the ERC-1155 token balance and metadata URI for a given wallet address and token ID on a specified blockchain network.

## Facts

- Endpoint: GET https://free-asset-radar-x402.besenok2018.workers.dev/api/x402/erc1155-balance?utm_source=zero.xyz
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-17
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/free-asset-radar-x402-erc-1155-balance-lookup-32660fd6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rZ3VzBA10qAJZBIJzQAeF

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 free-asset-radar-x402-erc-1155-balance-lookup-32660fd6
```

Example prompt: Can you check how many of ERC-1155 token ID 42 from contract 0xABC...123 the wallet 0xDEF...456 holds on Polygon, and give me the metadata URI?

## When to prefer this

Choose this endpoint when you need a lightweight, pay-per-call ERC-1155 balance and metadata URI lookup without managing your own blockchain RPC infrastructure. It is ideal for autonomous agents that need on-demand multi-token balance checks on networks like Polygon, especially when integrated into x402 payment flows.

## Known failure modes

- Invalid or malformed wallet/contract address returns an error
- Unsupported network identifier returns a lookup failure
- Token ID not found in contract returns zero balance or error
- Network RPC unavailability causes timeout or 5xx response
- Missing required parameters (address, tokenId, contract) results in 400 Bad Request

## How this service works

Stable edge-hosted x402 utilities for autonomous agents.

## Output

Returns a JSON object containing the token balance (as a string integer), the metadata URI (e.g. ipfs://...), and the network name (e.g. 'polygon') for the queried wallet, contract, and token ID combination.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "uri": "ipfs://...",
  "balance": "1",
  "network": "polygon"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/free-asset-radar-x402-erc-1155-balance-lookup-32660fd6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from free-asset-radar-x402.besenok2018.workers.dev](https://www.zero.xyz/host/free-asset-radar-x402.besenok2018.workers.dev/llms.txt)