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Synapse API — ADI Transaction History
x402
Synapse API — ADI 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 2026-09-13).
Fetches paginated transaction history for a blockchain address across 57+ networks via the Alchemy Data Infrastructure (ADI) API
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 asset transfer records for the specified address and filters, including transaction hashes, block numbers, from/to addresses, asset types, values, and optionally rich metadata such as token names, decimals, and logos.
Example use cases
Wallet activity audit for compliance
“Pull all transactions from address 0xDEF...456 between block 18000000 and 18500000, sorted oldest first, and include full metadata so I can audit what happened.”
DeFi portfolio transaction tracker
“Get me the most recent 50 transfers to and from my wallet 0x789...ABC, filtering out zero-value ones and including token metadata — I want to review my DeFi activity.”
Paginated history for large wallet
“Fetch the next page of transaction history for wallet 0x111...222 using pageKey 'abc123', sorted descending, max 100 results, and only include external and ERC20 categories.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/adi/tx/historyWhen to prefer
Choose this endpoint when you need structured, paginated blockchain transaction history for a specific address, especially when you want to filter by block range, transaction category, or exclude zero-value transfers. It is backed by Alchemy's ADI infrastructure, making it more reliable and richer in metadata than raw RPC node queries. Prefer it over generic blockchain explorers when you need programmatic access with fine-grained filtering and pay-per-call pricing at $0.01 USDC.
Side effects
- Invalid wallet address format returns a 400 error
- Unknown or unsupported category values may return empty results or errors
- If pageKey is expired or invalid, pagination fails with an error
- fromBlock greater than toBlock returns an empty result set or error
- Payment not fulfilled results in a 402 Payment Required response
- Network timeout or Alchemy upstream outage causes 503 errors
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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