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Blockscout Address Token Balances
x402
Blockscout Address Token Balances is a paid API for AI agents from api.blockscout.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).
Returns all token balances (ERC-20, ERC-721, ERC-1155) held by a specific address on a given blockchain network
Price / call$0.002
Success—
StatusUnknown
How this service works
Explore crypto activities with Blockscout's multichain search. Find transactions, addresses, tokens, and dapps across top blockchain networks — your go-to explorer for cross-chain blockchain data
Output
Returns an array of token balance objects, each containing token metadata (name, symbol, type, contract address), the balance value as a string, and for NFTs, a token ID and token instance details including image and attributes.
Example use cases
DeFi portfolio snapshot for a wallet
“What ERC-20 tokens and their balances does the wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 currently hold on Polygon (chain ID 137)? I want to see their full DeFi token portfolio.”
NFT ownership audit on a chain
“List all the NFTs and ERC-721 token balances owned by address 0xAb5801a7D398351b8bE11C439e05C5B3259aeC9A on Optimism — I need to audit which NFT collections they hold.”
Cross-chain token holding verification
“Check what tokens the address 0x742d35Cc6634C0532925a3b844Bc454e4438f44e holds on Base (chain ID 8453) — I need to verify they actually have the tokens they claim before we proceed.”
Technical details
Endpoint
GEThttps://api.blockscout.com/%7Bchain_id%7D/api/v2/addresses/%7Baddress_hash_param%7D/token-balancesWhen to prefer
Choose this endpoint when you need a comprehensive list of all tokens held by a specific wallet address on a particular blockchain, especially for multichain exploration via Blockscout's unified API. It is ideal when you need both fungible (ERC-20) and non-fungible (ERC-721/ERC-1155) token balances in a single call, and when you want on-chain data from a trusted open-source block explorer rather than a centralized exchange or wallet provider.
Side effects
- Invalid or malformed address hash returns 404 or empty result
- Unsupported chain_id returns an error or no data
- Address with no token holdings returns an empty array
- Rate limiting or payment failure returns 402 or 429 error
- Network timeout on heavily queried chains
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": [
{
"token": {},
"value": "string",
"token_id": "string",
"token_instance": {}
}
]
}Tags
x402
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