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Synapse API — Unichain Token Balances
x402
Synapse API — Unichain 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 2026-09-15).
Fetches token balances for a given wallet address on the Unichain 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 token balance data for the specified owner wallet on Unichain, including balances for each token contract queried. If no contract addresses are provided, may return all token balances held by the wallet.
Example use cases
DeFi portfolio tracker on Unichain
“Can you pull all the token balances for wallet 0x4f3a...8b2c on Unichain so I can see what assets I'm holding?”
Check specific token holdings before a swap
“Before I swap, can you check if wallet 0xDe9f...1a4B has any balance in the USDC contract at 0xA0b8...eB48 on Unichain?”
Monitoring a whale wallet's Unichain holdings
“Look up the token balances for address 0x7a25...c031 on Unichain and filter by these three token contracts: 0xTkn1..., 0xTkn2..., and 0xTkn3... — I want to track what they're holding.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/unichain/token/balancesWhen to prefer
Choose this endpoint when you specifically need token balance data on the Unichain network. It is ideal for DeFi dashboards, pre-transaction checks, and portfolio monitoring scoped to Unichain. Use the optional contractAddresses filter when you only care about specific tokens rather than a full portfolio sweep.
Side effects
- Invalid or malformed wallet address returns an error
- Invalid contract address format results in lookup failure
- Non-existent or zero-balance address returns empty results
- Network issues with Unichain RPC cause timeouts
- Payment failure (402) if USDC payment is not properly attached
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | |
| contractAddresses | array |
Tags
x402
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