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Synapse API — SEI Token Balances
x402
Synapse API — SEI 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 2026-09-14).
Retrieves token balances for a given wallet address on the SEI blockchain, 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 associated with the specified owner wallet address on the SEI blockchain, including token amounts per contract. If specific contract addresses are provided, results are filtered to those contracts only.
Example use cases
DeFi portfolio snapshot on SEI
“What tokens and amounts does the SEI wallet sei1qy5...mn3 currently hold? Give me a full breakdown of all token balances.”
Check specific token holdings
“I want to know the balance of these two token contracts — 0xToken1 and 0xToken2 — for the SEI wallet address sei1abc...def.”
Automated wallet monitoring agent
“For the SEI address sei1xyz...789, fetch its current token balances so I can track whether any holdings have changed since yesterday.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/sei/token/balancesWhen to prefer
Use this endpoint when you need to look up token balances specifically on the SEI blockchain. It is well-suited for DeFi portfolio checks, wallet auditing, and on-chain accounting tasks on SEI. If you need balances on other chains (Ethereum, Solana, etc.), sibling endpoints on the same API may cover those networks.
Side effects
- Invalid or malformed wallet address returns an error or empty result
- Non-existent contract addresses return zero balances or errors
- SEI network downtime or RPC node unavailability causes request failures
- Missing required 'owner' field causes a 400/validation error
- Rate limits or payment failure (x402) blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | |
| contractAddresses | array |
Tags
x402
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