# Base Token Whale Alert — Large Transfer Monitor

> Base Token Whale Alert — Large Transfer Monitor is a paid API for AI agents from 31-172-70-14.nip.io, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Returns large on-chain token transfers (whale alerts) on Base for a given block window, including sender, receiver, amount, and transaction hash, filtered by a minimum threshold.

## Facts

- Endpoint: GET https://31-172-70-14.nip.io/whales
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/base-token-whale-alert-large-transfer-monitor-da3c70fd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7hW7LptqjEwSU15YrwD2K

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 base-token-whale-alert-large-transfer-monitor-da3c70fd
```

Example prompt: Show me any whale transfers of the USDC token on Base in the last 500 blocks where the amount moved was at least 100,000 tokens — I want to see who's sending, who's receiving, and the tx hashes.

## When to prefer this

Use this endpoint when you need to detect large on-chain token movements (whale activity) for a specific token on the Base network, with control over the block range and minimum transfer size. Prefer this over general block explorers when you want structured, filtered whale-alert data without parsing raw logs.

## Known failure modes

- Invalid or unrecognized token address returns empty results or error
- Block window too large may time out or be rejected
- Threshold set too low may return too many results or hit a rate/size limit
- Token has no transfers in the specified window — returns empty list
- Network or RPC issues cause upstream data retrieval failure

## How this service works

Whale-алерты: крупные переводы токена на Base за окно блоков (from/to/сумма/tx), с порогом

## Output

A list of large token transfer events on Base within the specified block window that exceed the given threshold, each entry containing the sender address (from), recipient address (to), transfer amount, and transaction hash.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/base-token-whale-alert-large-transfer-monitor-da3c70fd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from 31-172-70-14.nip.io](https://www.zero.xyz/host/31-172-70-14.nip.io/llms.txt)