# Synapse Whale Tracking

> Synapse Whale Tracking is a paid API for AI agents from anibalb.duckdns.org, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-31).

Returns whale wallet activity for a token, including large buy/sell counts, net USD positions, and recent large on-chain transfers.

## Facts

- Endpoint: GET https://anibalb.duckdns.org/x402/whale-tracking?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synapse-whale-tracking-14b9730a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9zifBm4mUwIfgAkU4KYt3

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-whale-tracking-14b9730a
```

Example prompt: Can you pull the current whale activity for USDC on Base — show me which wallets are making the biggest net buys and sells, and list any recent large transfers?

## When to prefer this

Choose this endpoint when you need rapid, pay-per-call on-chain whale intelligence without setting up an account or API key. Ideal for agents that need ad-hoc whale activity snapshots for specific tokens on Base, especially when integrating with x402 micropayment flows. Prefer over subscription analytics platforms when cost per call matters more than historical depth.

## Known failure modes

- Token address not found or unsupported — empty or null whale array returned
- Payment not included or insufficient — HTTP 402 response requiring USDC payment on Base
- Network timeout if Base RPC is congested — slow or failed response
- No whale activity detected for low-liquidity tokens — empty arrays returned
- Invalid query parameters — 400 bad request

## How this service works

Public data and utility APIs paid per call in USDC on Base (x402). No accounts, no API keys. 174 routes: crypto/equity data, onchain reads, DNS/email/security intel, geo/weather, x402 payment diagnostics, dev utilities and more.

## Output

Returns a JSON object containing the tracked token address, an array of whale wallets each with buy count, sell count, net USD position, and wallet address, plus a list of recent large transfers with sender, receiver, block number, and USD value.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "whales": [
   {
    "buys": 3,
    "sells": 1,
    "wallet": "0x...",
    "net_usd": 50000
   }
  ],
  "recent_large_transfers": [
   {
    "to": "0x...",
    "from": "0x...",
    "block": 123456,
    "value_usd": 12000
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synapse-whale-tracking-14b9730a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from anibalb.duckdns.org](https://www.zero.xyz/host/anibalb.duckdns.org/llms.txt)