# HyperD Multi-Chain Token Balance Lookup

> HyperD Multi-Chain Token Balance Lookup is a paid API for AI agents from api.hyperd.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Fetches ERC-20 and native token balances for a wallet address across Base, Ethereum, Polygon, Arbitrum, and other EVM chains, with optional parallel multi-chain mode.

## Facts

- Endpoint: GET https://api.hyperd.ai/api/balance?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-hyperd-ai-3fec962c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pOmcXxL27X4q8862BGO7c

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 api-hyperd-ai-3fec962c
```

Example prompt: What's the USDC balance for wallet 0xAbC123...def on Base — and also check all other supported chains in parallel while you're at it?

## When to prefer this

Use this endpoint when you need to check ERC-20 or native token balances for any EVM-compatible wallet across popular chains like Base, Ethereum, Polygon, Arbitrum, or Optimism. It is especially useful when you need a quick multi-chain snapshot via chain=all. Prefer this over general RPC calls when you want a normalized, aggregated response without managing individual chain RPC endpoints.

## Known failure modes

- Invalid wallet address format returns an error response
- Unsupported chain value returns a validation error
- Token contract address not found on specified chain returns zero or not-found result
- Rate limiting or payment failure (x402) if USDC payment is not attached
- Network timeout on a specific chain when using chain=all parallel mode

## How this service works

Multi-chain ERC-20 + native balance lookup (Base, Ethereum, Polygon, Arbitrum). Pass ?chain=all for parallel multi-chain.

## Output

Returns the ERC-20 or native token balance for the specified wallet address on the requested chain(s). When chain=all is passed, results are returned in parallel across Base, Ethereum, Polygon, Arbitrum, Optimism, Avalanche, BNB, and Base Sepolia. Includes balance amounts per token and chain.

## Example request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "chain": "base",
   "address": "0x1234567890123456789012345678901234567890"
  }
 }
}
```

## 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"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "address"
     ],
     "properties": {
      "chain": {
       "enum": [
        "base",
        "ethereum",
        "polygon",
        "arbitrum",
        "optimism",
        "avalanche",
        "bnb",
        "base-sepolia",
        "all"
       ],
       "type": "string"
      },
      "token": {
       "type": "string"
      },
      "address": {
       "type": "string"
      }
     }
    }
   },
   "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/api-hyperd-ai-3fec962c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.hyperd.ai](https://www.zero.xyz/host/api.hyperd.ai/llms.txt)