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Synapse API — opBNB Token Transfer History
x402
Synapse API — opBNB Token Transfer History 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).
Retrieves token transfer history for a wallet address on the opBNB blockchain network, with filtering by block range, contract addresses, and pagination.
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 paginated list of token transfer events on opBNB for the queried wallet/contract criteria, including transaction hashes, sender/receiver addresses, token contract details, amounts, and block numbers. A pageKey is returned when more results are available for subsequent pagination calls.
Example use cases
Wallet token activity audit
“Show me all token transfers in and out of wallet 0x742d35Cc6634C0532925a3b8D4C9B7e2d1E4f3a on opBNB from block 5000000 to 6000000, sorted in descending order, max 50 results.”
DeFi protocol transfer monitoring
“Get me the last 200 token transfers involving the contract 0x9aB7d8E1f2C3d4e5F6a7B8C9d0E1f2A3b4C5d6E7 on opBNB, newest first, so I can track activity on this DeFi pool.”
Multi-token portfolio history
“Retrieve all token transfers for address 0x1aB2cD3eF4gH5iJ6kL7mN8oP on opBNB, filtering by these two contracts — 0xToken1... and 0xToken2... — sorted ascending starting from block 4500000, up to 100 entries.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/opbnb/token/transfersWhen to prefer
Use this endpoint when you specifically need token transfer history on the opBNB (BNB Chain Layer 2) network. It is the right choice when you need block-range filtering, multi-contract filtering, and paginated access to transfer history. Prefer this over generic blockchain explorers when you need programmatic, pay-per-call access without API key management, and when opBNB is the target chain.
Side effects
- Invalid wallet address format returns an error
- Invalid contract address in contractAddresses array causes rejection
- fromBlock greater than toBlock returns an empty result or error
- Invalid pageKey causes pagination to fail or restart
- maxCount exceeding API limits may return a capped result set
- Network or RPC errors for opBNB may cause transient failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| order | string | |
| owner | string | |
| pageKey | string | |
| toBlock | string | |
| maxCount | number | |
| fromBlock | string | |
| contractAddresses | array |
Tags
x402
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