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Phantom API — Token Balances
x402
Phantom API — Token Balances is a paid API for AI agents from phantom-api-omega.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Fetches token balances for a given wallet address, optionally filtered by specific contract addresses, across 57+ blockchain networks
Price / call$0.01
Success—
StatusUnknown
How this service works
Lightning-fast access to blockchain data, smart contract insights, and Web3 infrastructure across 57+ networks. Pay-per-call via x402.
Output
Returns token balance data for the specified wallet owner, including balances for each token contract address provided. The response includes per-token holdings amounts, likely with token metadata such as symbol and decimals, enabling portfolio-level or contract-specific balance lookups.
Example use cases
DeFi portfolio token audit
“Show me all token balances held by wallet 0xAbCd...1234 across all contracts — I want a full breakdown of their on-chain holdings.”
Verify specific token holdings
“Check if wallet 0xUser...5678 holds any USDC or WETH — their contract addresses are 0xA0b8...eB48 and 0xC02a...6Cc2.”
Monitor whale wallet assets
“What tokens does wallet 0xWhale...9999 currently hold? I want to track their positions across these three token contracts: 0xAAA..., 0xBBB..., and 0xCCC....”
Technical details
Endpoint
POSThttps://phantom-api-omega.vercel.app/api/plasma/token/balances?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need fast, pay-per-call on-chain token balance lookups across a broad range of EVM-compatible or multi-chain networks without committing to a subscription. It is well-suited for agents that need ad-hoc balance checks for arbitrary wallets and token contracts, especially when supporting 57+ networks matters and low per-query cost ($0.01 USDC) is a priority over high-volume bulk pricing.
Side effects
- Invalid or malformed wallet address returns an error or empty result
- Non-existent contract addresses may return zero balances or errors
- Network unavailability across the 57+ supported chains could result in partial data
- Unsupported blockchain network for certain contract addresses
- Rate limits or payment failures under x402 protocol returning 402 responses
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | |
| contractAddresses | array |
Tags
x402
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