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Postandshare Multi-Chain EVM Balance Lookup
x402
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.
Price / call$0.001
Success—
StatusUnknown
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.
Example use cases
DeFi portfolio balance check
“Can you check how much ETH is in wallet 0x742d35Cc6634C0532925a3b8D4C9b3C5f4b2A1e on Ethereum right now?”
Smart contract treasury audit
“Look up the native token balance of 0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48 on Arbitrum — I need to know what's sitting in that contract.”
Multichain wallet monitoring
“Check the MATIC balance of address 0x1234567890abcdef1234567890abcdef12345678 on Polygon for me.”
Technical details
Endpoint
GEThttps://api.postandshare.net/v1/chain/balance?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | 0x-prefixed EVM address |
| network | string | Chain to read (default base) |
Tags
x402
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