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Cortex402 Wallet Balance Validator
x402
Cortex402 Wallet Balance Validator is a paid API for AI agents from jtifhcvbgxqwlywugvjv.supabase.co, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-14).
Queries on-chain native or ERC-20 token balance for a given EVM wallet address and network, returning balance, block height, and an optional sufficient/deficient flag against a threshold.
Price / call$0.02
Success—
StatusUnknown
How this service works
Check any wallet balance across 5 EVM chains. Returns native or ERC-20 balance with threshold check, block height, and on-chain receipt. Supports Base, Ethereum, Arbitrum, Optimism, and Polygon.
Output
Returns the current on-chain balance (in decimal and raw atomic units), the block height at the time of query, and — if a threshold was provided — a sufficient/deficient flag indicating whether the wallet meets the required balance.
Example use cases
Pre-payment wallet sufficiency check
“Before I send the invoice, can you verify that my client's wallet on Ethereum has at least 5000 USDC? I don't want to generate the payment request if they're not funded.”
Multi-chain token balance verification
“I need to know how much WBTC this address holds across all our supported chains — just give me the totals so I can see where their Bitcoin is distributed.”
Automated workflow funding validation
“Set up a check for me: every time we're about to execute a contract on Polygon, verify that the operator wallet has a minimum balance of 10 MATIC. If it doesn't, flag it so we can top up before proceeding.”
Technical details
Endpoint
POSThttps://jtifhcvbgxqwlywugvjv.supabase.co/functions/v1/cortex402-wallet-balanceWhen to prefer
Choose this endpoint when you need a fast, single-call on-chain balance lookup across Base, Ethereum, Arbitrum, Optimism, or Polygon — especially when you also need to validate sufficiency against a threshold before triggering a payment or workflow step. Preferred over block explorer scraping or full node queries when you want a normalized, structured response with a built-in sufficient/deficient flag.
Side effects
- Invalid or malformed wallet address returns a 4xx error with address validation message
- Unsupported network enum value returns an error listing valid chains
- Unknown or unsupported token symbol returns an error; use raw ERC-20 contract address as fallback
- RPC node timeout or chain congestion may cause delayed or failed responses
- Threshold provided in wrong format (e.g. mixing decimal and atomic units) may yield incorrect sufficient/deficient flag
- Payment of $0.02 USDC not provided or rejected results in 402 Payment Required
Input
{
"token": "USDC",
"address": "0x742d35Cc6634C0532925a3b844Bc9e7595f42bE1",
"network": "base",
"threshold": "100"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| token | string | Token symbol (USDC/USDT/WETH/WBTC/DAI) or raw ERC-20 contract address. Omit for native balance. |
| address | string | EVM wallet address (0x-prefixed 40-hex) |
| network | string | Chain to query. Defaults to Base mainnet. |
| threshold | string | Optional decimal amount or raw atomic units. If provided, response includes sufficient/deficient flag. |
Output
{
"block": "0x2d4901f",
"token": {
"kind": "erc20",
"symbol": "USDC",
"address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"decimals": 6
},
"source": "Base mainnet RPC · eth_call balanceOf(address)",
"address": "0x742d35Cc6634C0532925a3b844Bc9e7595f42bE1",
"balance": {
"raw": "0",
"decimals": 6,
"formatted": "0"
},
"deficit": {
"raw": "100",
"formatted": "0.0001"
},
"network": "base",
"chain_id": 8453,
"threshold": {
"raw": "100",
"formatted": "0.0001"
},
"fetched_at": "2026-06-18T05:07:45.974Z",
"receipt_tx": "0x397b69745cd3186a5ef83563c07dffd609b4e67d6a74d5e1c391c66f167a4da8",
"request_id": "wb_4402011bbc6c458b852475",
"sufficient": false
}Tags
x402
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