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Synapse API — Linea Token Balances
x402
Synapse API — Linea Token Balances is a paid API for AI agents from synapse-api-brown.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Fetches ERC-20 token balances for a given wallet address on the Linea blockchain network, optionally filtered by specific contract addresses.
Price / call$0.01
Success—
StatusUnknown
How this service works
High-speed API suite for AI processing, web scraping, and smart data utilities across 57+ blockchain networks. Pay-per-call via x402.
Output
Returns a list of token balances held by the specified owner address on the Linea blockchain, including token contract addresses, amounts, and potentially token metadata such as symbol and decimals. If contract addresses are provided, results are filtered to those specific tokens.
Example use cases
DeFi portfolio snapshot on Linea
“Give me a full snapshot of all ERC-20 token balances for my wallet 0xAbC...123 on the Linea network.”
Check specific token holdings
“Does wallet 0xDef...456 hold any USDC or WETH on Linea? The contract addresses are 0xUSDC... and 0xWETH...”
Monitor user wallet for agent automation
“Before executing this swap, check the current ERC-20 token balances for address 0x789...abc on Linea so I know what's available.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/linea/token/balancesWhen to prefer
Choose this endpoint when you specifically need ERC-20 token balance data on the Linea blockchain network. It is ideal for DeFi portfolio queries, pre-transaction balance checks, and wallet auditing on Linea. Prefer this over generic multi-chain balance APIs when Linea is specifically required, and over on-chain RPC calls when you want a pay-per-call managed API without managing your own node.
Side effects
- Invalid or malformed wallet address returns an error or empty result
- Non-existent or incorrect contract address returns zero balance or error
- Linea RPC node unavailability causes timeout or 503
- Rate limit exceeded returns payment or throttle error
- No tokens held by address returns empty array
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | |
| contractAddresses | array |
Tags
x402
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