# Synapse API — Token Transfers Lookup

> Synapse API — Token Transfers Lookup 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 token transfer history for a given wallet owner across blockchain networks, with filtering by block range, contract addresses, and pagination support.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/tempo/token/transfers
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-token-transfers-lookup-e4e4142e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_b_djheJbGFzmdWEDhpZ9X

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-token-transfers-lookup-e4e4142e -d '<json body>'
```

Example prompt: Pull all token transfers for wallet 0xABCD...1234, filtered to transfers from block 18000000 to 18500000, sorted ascending, and limit results to 100 transfers.

## When to prefer this

Choose this endpoint when you need to retrieve historical token transfer events for a specific wallet address on supported blockchain networks, especially when you need filtering by block range or specific ERC-20/ERC-721 contract addresses. It is well-suited for portfolio auditing, on-chain forensics, and DeFi activity tracking where paginated token movement history is required.

## Known failure modes

- Invalid or malformed wallet address returns an error or empty result set
- Non-existent contract address yields empty transfers array
- Invalid block number format causes a 400-level error
- Expired or invalid pageKey causes pagination to fail or restart
- Exceeding maxCount limits may silently truncate results
- Network or rate limit errors may return 429 or 5xx responses

## 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 records for the specified wallet owner, each containing transaction hash, block number, from/to addresses, token contract, value transferred, and asset type. Supports pagination via a pageKey for iterating through 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-token-transfers-lookup-e4e4142e/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)