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Synapse API — Sonic Transaction History
x402
Synapse API — Sonic Transaction 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 2026-09-15).
Retrieves paginated transaction history for addresses on the Sonic blockchain network, with filtering by block range, category, and address.
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 transactions matching the specified filters, including transaction hashes, block numbers, from/to addresses, asset values, and optionally rich metadata. Supports pagination via a pageKey for retrieving large result sets incrementally.
Example use cases
Wallet activity audit for compliance
“Get me a full list of all transactions sent from 0xDeFi456... on Sonic between block 5000000 and 5100000, descending order, with metadata included so I can audit what happened.”
Incoming transfer monitoring for a dApp
“Show me up to 50 incoming transactions to my Sonic contract address 0xMyContract789... filtering only ERC20 and internal categories, newest first, and skip any zero-value ones.”
Paginated history fetch for analytics
“Fetch the next page of Sonic transaction history for address 0xTrader321... using pageKey 'abc123xyz', limit 100 results, ascending order so I can process them chronologically.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/sonic/tx/historyWhen to prefer
Use this endpoint when you need to look up historical transaction activity specifically on the Sonic blockchain network, with flexible filtering by address, block range, asset category, and value. Prefer this over general Ethereum or EVM endpoints when the target chain is Sonic, and when you need pagination support for large result sets.
Side effects
- Invalid address format returns 400 error
- Block range too large may return timeout or partial results
- Unknown category type causes validation error
- Invalid pageKey returns empty or error response
- Network unavailable on Sonic node returns 503
- maxCount exceeding allowed limit may be clamped or rejected
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| order | string | |
| pageKey | string | |
| toBlock | string | |
| category | array | |
| maxCount | number | |
| fromBlock | string | |
| toAddress | string | |
| fromAddress | string | |
| withMetadata | boolean | |
| excludeZeroValue | boolean |
Tags
x402
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