# Synapse API — Kaia Token Transfers

> Synapse API — Kaia 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 2026-09-13).

Retrieves token transfer history for a given owner address on the Kaia blockchain, with optional filtering by block range, contract addresses, and pagination.

## Facts

- Endpoint: POST https://synapse-api-brown.vercel.app/api/kaia/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-kaia-token-transfers-1a4ab713
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h7ZbAJHplJztsr-zs4d2d

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-kaia-token-transfers-1a4ab713 -d '<json body>'
```

Example prompt: Pull all token transfers for Kaia wallet 0xAbC123...def sorted in descending order, limited to 50 results, filtering only for contract 0xToken456...789.

## When to prefer this

Use this endpoint when you need on-chain token transfer history specifically on the Kaia blockchain for a given wallet or set of contracts. It is distinct from general EVM chain transfer APIs and is purpose-built for Kaia network data. Prefer it over generic blockchain explorers when you need programmatic, paginated, filterable transfer data accessible via pay-per-call without a subscription.

## Known failure modes

- Invalid or malformed owner address returns an error or empty result
- Invalid block numbers (fromBlock/toBlock) may return an error or unexpected range
- Exceeding max supported maxCount may be silently capped or return an error
- Invalid contractAddress format causes request failure
- Missing required owner field results in a validation error
- Payment failure via x402 protocol 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 owner on the Kaia blockchain, including details such as sender, recipient, token contract, amount, and block number. Supports 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-kaia-token-transfers-1a4ab713/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)