# Synapse API — Katana Token Transfers

> Synapse API — Katana Token Transfers 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 2026-10-29).

Retrieves token transfer history for a wallet or contract address on Katana (blockchain), with filtering by block range, contract, and pagination.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/katana/token/transfers?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-katana-token-transfers-19dda84b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ny92K83JJCdHdp0a4ArmJ

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability synapse-api-katana-token-transfers-19dda84b -d '<json body>'
```

Example prompt: Pull all token transfers for wallet 0xAbc123... on Katana, sorted ascending, limited to 100 results, and only for the USDC contract at 0xDef456...

## When to prefer this

Use this endpoint when you need on-chain token transfer history specifically on the Katana blockchain network and want block-range filtering, contract-address filtering, and cursor-based pagination in a single pay-per-call request. Prefer this over generic blockchain explorers when you need programmatic, structured output for agent workflows rather than human-readable UI.

## Known failure modes

- Invalid owner address format returns validation error
- Unknown or unsupported contract address returns empty results
- Invalid block range (fromBlock > toBlock) returns error
- Missing required owner field causes request rejection
- Rate limiting or payment failure returns 402 or 429 error
- Invalid pageKey causes pagination failure

## 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

A list of token transfer events for the specified wallet/contract, including sender, recipient, token amount, contract address, block number, and transaction hash, along with a pagination key for fetching the next page of results.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "order": {
   "enum": [
    "asc",
    "desc"
   ],
   "type": "string"
  },
  "owner": {
   "type": "string"
  },
  "pageKey": {
   "type": "string"
  },
  "toBlock": {
   "type": "string"
  },
  "maxCount": {
   "type": "number"
  },
  "fromBlock": {
   "type": "string"
  },
  "contractAddresses": {
   "type": "array",
   "items": {
    "type": "string"
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-api-katana-token-transfers-19dda84b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from synapse-api-brown.vercel.app](https://www.zero.xyz/host/synapse-api-brown.vercel.app/llms.txt)