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Synapse API — Katana Transaction History
x402
Synapse API — Katana 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 transaction history for addresses on the Katana 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 paginated list of transactions on the Katana network matching the specified filters, including transaction details such as from/to addresses, block numbers, categories, and optionally full metadata. Supports cursor-based pagination via pageKey for large result sets.
Example use cases
Wallet activity audit for compliance
“Get me all inbound and outbound transactions for wallet 0xDEF...456 on Katana between blocks 500000 and 600000, sorted ascending, with full metadata included.”
DeFi portfolio transaction tracking
“Fetch the most recent 50 token transfers received by my Katana wallet 0x789...ABC, excluding any zero-value transfers, sorted newest to oldest.”
On-chain activity pagination for dashboard
“I need the next page of transaction history for address 0x111...222 on Katana — use pageKey 'abc123xyz' and return up to 25 results in ascending order.”
Technical details
Endpoint
POSThttps://synapse-api-brown.vercel.app/api/katana/tx/historyWhen to prefer
Choose this endpoint when you need historical transaction data specifically from the Katana blockchain network, with fine-grained control over block range, address direction, transaction categories, and result ordering. It is well-suited for agents performing on-chain audits, portfolio tracking, or building dashboards that require paginated access to wallet activity on Katana.
Side effects
- Invalid or malformed address returns an error or empty result
- fromBlock greater than toBlock returns an error or no results
- Invalid category enum value may return an error
- Exceeding maxCount limits may result in truncated or errored responses
- pageKey from a different query context may produce unexpected results
- Network or upstream Katana RPC unavailability causes 5xx errors
- Payment failure via x402 protocol results in 402 response blocking the call
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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