# Synapse API — ZKsync Token Transfers

> Synapse API — ZKsync 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 2026-09-15).

Retrieves token transfer history for a given address on the ZKsync blockchain network, with filtering by block range, contract, and pagination.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/zksync/token/transfers
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-zksync-token-transfers-8dc60a91
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0R24L7cMcGbgLkuQAuzhB

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-zksync-token-transfers-8dc60a91 -d '<json body>'
```

Example prompt: Show me all token transfers for ZKsync wallet 0xAbC123...def456 from block 1000000 to 2000000, sorted in descending order, and limit it to the first 50 results.

## When to prefer this

Use this endpoint when you need to retrieve token transfer history specifically on the ZKsync Layer 2 network. It is ideal for auditing wallet activity, tracking ERC-20 movements, or building analytics for a ZKsync address. Prefer it over Ethereum mainnet transfer endpoints when the target activity is on ZKsync, and use the block range and contract address filters to narrow down results efficiently.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result
- Block range not yet indexed may return incomplete data
- Invalid page key causes pagination failure
- Unsupported contract address format results in empty transfers
- Rate limiting or payment failure (x402) blocks the request
- Requesting too high a maxCount may be capped or cause timeout

## 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 token transfer events on the ZKsync network for the specified owner address, including token contract details, sender/receiver addresses, amounts, block numbers, and transaction hashes. Supports paginated responses via a page key for large result sets.

## 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-zksync-token-transfers-8dc60a91/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)