# Synapse API — Unichain Token Transfer History

> Synapse API — Unichain Token Transfer 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 2026-09-15).

Fetches paginated token transfer history for a given wallet address on the Unichain blockchain network

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/unichain/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-unichain-token-transfer-history-8d043877
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KcnQu5-RjN6ecivCcr26x

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-unichain-token-transfer-history-8d043877 -d '<json body>'
```

Example prompt: Pull all token transfers for wallet 0xAbC...123 on Unichain from block 1000000 to 2000000, sorted descending, and return up to 50 results.

## When to prefer this

Choose this endpoint when you need on-chain token transfer history specifically for the Unichain network. It supports flexible filtering by block range, contract address, and sort order with pagination, making it well-suited for auditing, portfolio tracking, or forensic analysis on Unichain. Prefer this over general EVM explorers when you need programmatic, pay-per-call access without API key setup.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result set
- Block range too large may result in timeout or truncated results
- Invalid pageKey causes pagination failure
- Unsupported contract address format returns validation error
- Rate limiting or payment failure (x402) blocks the request

## 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 for the specified wallet on Unichain, including transaction hashes, block numbers, token contract addresses, sender/receiver addresses, and amounts, 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-unichain-token-transfer-history-8d043877/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)