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Synapse API — X Layer Token Balances
x402
Synapse API — X Layer 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 2026-10-29).
Fetches ERC-20 token balances for a wallet address on the X Layer blockchain network
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 wallet address across the provided ERC-20 contract addresses on the X Layer network, including token amounts and associated contract metadata.
Example use cases
DeFi portfolio snapshot on X Layer
“What ERC-20 token balances does wallet 0xAbC123... hold on X Layer? Check for these contracts: 0xUSDC... and 0xWETH....”
Verify token airdrop receipt
“Did wallet 0xDef456... receive any tokens for contract 0xAirdropToken... on X Layer? Show me the current balance.”
Monitor whale wallet holdings
“What are the current token balances for wallet 0xWhale789... on X Layer for contracts 0xTokenA... and 0xTokenB...?”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/xlayer/token/balances?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to look up ERC-20 token balances specifically on the X Layer blockchain network. Prefer this over generic blockchain explorers when you need programmatic, pay-per-call access with a simple JSON interface and support for querying multiple token contracts in one call.
Side effects
- Invalid wallet address format returns an error
- Invalid or non-existent contract addresses may return zero balances or an error
- X Layer RPC unavailability may cause timeout or 503
- Missing required owner field returns a validation error
- Payment not processed (x402 failure) returns 402 Payment Required
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| owner | string | |
| contractAddresses | array |
Tags
x402
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