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Synapse API — Degen Transaction History
x402
Synapse API — Degen 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).
Retrieves paginated blockchain transaction history for a given address or address pair across supported networks, filtered by block range and category.
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 queried address(es), including transaction hashes, block numbers, token amounts, asset categories, and optionally token metadata. A pageKey is included when additional pages are available.
Example use cases
DeFi wallet audit for compliance
“Pull the full transaction history for wallet 0x1234...abcd — I need all asset transfers in descending order from block 17000000 to 18000000, with metadata, excluding zero-value transfers. Give me up to 100 results.”
Tracking incoming token transfers
“Get me all incoming transfers to my wallet 0xAABB...CCDD across ERC-20 and ERC-721 categories, starting from block 19000000, in ascending order so I can see what arrived first.”
Paginating through large transfer history
“Continue fetching transaction history for address 0xDEAD...BEEF using the pageKey from my last query — same filters, descending order, max 50 results this time.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/degen/tx/historyWhen to prefer
Use this endpoint when you need to retrieve historical asset transfer data for one or more blockchain addresses with flexible filtering by block range, category, direction, and value. Prefer it over generic blockchain explorers when you need programmatic, paginated, pay-per-call access without API key management, especially in agent workflows that pay via x402/USDC microtransactions.
Side effects
- Invalid or missing address returns an error or empty result set
- Invalid block range (toBlock < fromBlock) may return an error
- Unsupported category values may cause a 400 bad request
- Expired or invalid pageKey causes pagination to fail
- Rate limit exceeded returns a 429 or payment-required response
- Network not supported by the underlying provider returns an error
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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