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Whale Alert API

br0ski777/whale-alert-x402

Monitors large cryptocurrency transactions on Ethereum and Base networks, helping you track whale activity without manually scanning block explorers. The server connects to a hosted API at whale-alert.api.klymax402.com and requires x402 micropayments to access transaction data. Useful when you're building trading alerts, analyzing market movements, or researching wallet behavior patterns. The repository is minimal with no public documentation on specific tools or prompts exposed, so you'll need to explore the MCP interface directly to see what queries and filters are available. Built by Br0ski777 and deployed as a remote SSE transport server.

tool
1
transport
SSE
last updated
May 16, 2026
View on GitHub

Tools

1 tools

Public tool metadata for what this MCP can expose to an agent.

crypto_track_whale_transactionsUse this when you need to track large on-chain transactions (whale movements) on Ethereum or Base. Returns recent high-value transfers in JSON. 1. transactions: array of whale transfers sorted by val2 params

Use this when you need to track large on-chain transactions (whale movements) on Ethereum or Base. Returns recent high-value transfers in JSON. 1. transactions: array of whale transfers sorted by val

Parameters* required
chainstring
Blockchain: 'ethereum' or 'base' (default: ethereum)
minValuenumber
Minimum transaction value in ETH (default: 100)

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Readme

Whale Alert API

MCP Server x402 License: MIT

Whale transaction tracker -- large on-chain transfers with sender, value, USD estimate. Market-moving alerts. Pay-per-call via x402 (USDC on Base L2) -- no API key, no signup, no rate-limit wall.

Part of the klymax402 marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.

Quickstart -- MCP

Add to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):

{
  "mcpServers": {
    "whale-alert": {
      "url": "https://whale-alert.api.klymax402.com/mcp"
    }
  }
}

Quickstart -- HTTP (x402)

curl -X POST "https://whale-alert.api.klymax402.com/api/whales" \
  -H "Content-Type: application/json" \
  -d '{}'
# -> 402 Payment Required, with an x402 payment challenge in the response body

View the full README on GitHub

Details

Repository
github.com/br0ski777/whale-alert-x402
Website
github.com/Br0ski777/whale-alert-x402
Category
Finance & Commerce
Transport
SSE
Registry
MCP registry, active

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