# Coin Railz Multi-Chain Wallet Balance

> Coin Railz Multi-Chain Wallet Balance is a paid API for AI agents from coinrailz.com, paid per call via x402, $0.5/call, status unknown (last checked 2026-09-14).

Queries wallet balances across 7+ EVM-compatible blockchains in a single API call

## Facts

- Endpoint: POST https://coinrailz.com/x402/multi-chain-balance
- Price: $0.5/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/coin-railz-multi-chain-wallet-balance-94163c17
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n5s64vbKWFyFGqfyY0Qrz

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 coin-railz-multi-chain-wallet-balance-94163c17 -d '<json body>'
```

Example prompt: What are the token balances for wallet 0x742d35Cc6634C0532925a3b8D4C9C6e9f1234567 across all supported EVM chains — I want to see everything it holds on Ethereum, Arbitrum, Polygon, Base, and any other chains you can check?

## When to prefer this

Use this endpoint when you need to aggregate a wallet's token holdings across multiple EVM chains in a single call, avoiding the need to query each chain individually. Ideal for DeFi dashboards, portfolio trackers, and AI agents that need a holistic view of an address's on-chain assets.

## Known failure modes

- Invalid or malformed wallet address returns an error response
- Unsupported chain identifier causes partial or failed lookup
- Payment not fulfilled via x402 protocol results in 402 Payment Required
- Rate limiting or quota exceeded returns an appropriate error
- Network timeouts for specific chains may result in incomplete multi-chain data

## How this service works

Query wallet balances across 7+ EVM chains in a single API call

## Output

A JSON object indicating success, the service name, a timestamp, and the aggregated wallet balance results across 7+ EVM chains for the queried address

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "description": "Query parameter for the service"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "application/json",
 "format": "json",
 "example": {
  "result": "Service executed successfully",
  "service": "multi-chain-balance",
  "success": true,
  "timestamp": "2026-02-07T01:40:54.723Z"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/coin-railz-multi-chain-wallet-balance-94163c17/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from coinrailz.com](https://www.zero.xyz/host/coinrailz.com/llms.txt)