# Postandshare Multi-Chain EVM Balance Lookup

> Postandshare Multi-Chain EVM Balance Lookup is a paid API for AI agents from api.postandshare.net, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).

Fetches the native token balance of an EVM address on Base, Ethereum, Arbitrum, or Polygon via a pay-per-call x402 endpoint.

## Facts

- Endpoint: GET https://api.postandshare.net/v1/chain/balance?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/postandshare-multi-chain-evm-balance-lookup-c192ce82
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9wpxBZ8NiXb2-r91-1yih

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 postandshare-multi-chain-evm-balance-lookup-c192ce82
```

Example prompt: What's the native token balance of wallet 0x742d35Cc6634C0532925a3b8D4C9b3C5f4b2A1e on Base?

## When to prefer this

Use this endpoint when an agent needs a quick, cheap ($0.001 USDC) on-chain native balance read across Base, Ethereum, Arbitrum, or Polygon without setting up direct RPC infrastructure. It is ideal for pay-per-call agent workflows using the x402 micropayment protocol, especially when cross-chain balance checks are needed without integrating multiple RPC providers. Prefer this over full node queries or heavier blockchain data APIs when only native balance is needed.

## Known failure modes

- Invalid or malformed 0x address returns an error response
- Unsupported network value returns a validation error
- Address with no on-chain activity may return zero balance
- Payment failure (x402) if USDC payment is not correctly attached
- Network RPC downtime may cause timeouts or empty responses

## How this service works

x402 pay-per-call data endpoints for AI agents: multi-chain reads (Base, Ethereum, Arbitrum, Polygon) and Nigerian reference data. Format/reference validation only — no personal data, no identity-database lookup.

## Output

Returns the native token balance (e.g. ETH, MATIC) for the specified 0x wallet address on the requested EVM-compatible chain. The response includes the balance amount tied to the address and network queried.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "address": {
   "type": "string",
   "description": "0x-prefixed EVM address"
  },
  "network": {
   "enum": [
    "base",
    "ethereum",
    "arbitrum",
    "polygon"
   ],
   "type": "string",
   "description": "Chain to read (default base)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/postandshare-multi-chain-evm-balance-lookup-c192ce82/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.postandshare.net](https://www.zero.xyz/host/api.postandshare.net/llms.txt)