# Synapse API — Avalanche Token Transfers

> Synapse API — Avalanche 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 2026-09-14).

Retrieves ERC-20 and native token transfer history for a given address or contract on the Avalanche blockchain network.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/avalanche/token/transfers
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-api-avalanche-token-transfers-8d81d552
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_stvfdb9sBBw4K6PUVoul5

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-avalanche-token-transfers-8d81d552 -d '<json body>'
```

Example prompt: Pull all token transfers for the Avalanche wallet 0xAbc123...def in descending order from block 10000000 to 11000000, filtering only transfers involving contract 0xToken1...xyz, and return up to 50 results.

## When to prefer this

Use this endpoint when you need on-chain token transfer history specifically on the Avalanche network, with support for block-range filtering, contract address filtering, and paginated retrieval. Prefer this over generic blockchain explorers when you need structured, machine-readable transfer data accessible via a simple pay-per-call API without managing your own node.

## Known failure modes

- Invalid or malformed owner address returns an error or empty result
- Block range too wide may exceed API limits or return timeout
- Invalid pageKey causes pagination failure
- Unknown contract address returns empty transfers array
- Missing required owner field may return a validation error
- Network congestion or Avalanche node unavailability causes delayed or failed response

## 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 Avalanche network matching the query criteria, including transaction hashes, block numbers, token contract addresses, sender and recipient addresses, and transfer amounts. Supports cursor-based pagination via pageKey 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-avalanche-token-transfers-8d81d552/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)