Whale Alert API
Track large on-chain whale transactions on Ethereum and Base. x402 micropayment.
Installation
Ajoutez ceci à la configuration MCP de votre client (Claude Desktop : claude_desktop_config.json ; Cursor : .cursor/mcp.json ; VS Code et les autres utilisent la même forme « mcpServers »).
claude mcp add --transport sse whale-alert-api 'https://whale-alert.api.klymax402.com/mcp'
{
"mcpServers": {
"whale-alert-api": {
"type": "sse",
"url": "https://whale-alert.api.klymax402.com/mcp"
}
}
}
Documentation
Tirée du README du projet sur GitHub, actualisée chaque semaine. Les liens ouvrent GitHub.
Sommaire
Whale Alert API
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
Any x402-aware client (@x402/fetch, x402-agent-tools, ATXP) handles the 402 -> sign -> retry cycle automatically.
Tools
| Tool | Method | Path | Price | Description |
|---|---|---|---|---|
crypto_track_whale_transactions | POST | /api/whales | $0.008 | Track large on-chain whale transactions |
crypto_track_whale_transactions
Use this when you need to track large on-chain transactions (whale movements) on Ethereum or Base. Returns recent high-value transfers in JSON.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
chain | string | no | Blockchain: 'ethereum' or 'base' (default: ethereum) |
minValue | number | no | Minimum transaction value in ETH (default: 100) |
Returns
transactions-- array of whale transfers sorted by value descendingfrom-- sender wallet addressto-- receiver wallet addressvalueEth-- transaction value in ETHvalueUsd-- estimated USD value at time of transfertxHash-- transaction hash for on-chain verificationblockNumber-- block number of the transactiontimestamp-- when the transaction occurred
Example response:
{"transactions":[{"from":"0xab...","to":"0xcd...","valueEth":500.0,"valueUsd":1552500,"txHash":"0xef...","blockNumber":19845632,"timestamp":"2026-04-13T11:22:00Z"}],"chain":"ethereum","minValue":100,"totalFound":8}
When to use: detecting market-moving whale activity and smart money flows. Essential for trading signal generation and on-chain intelligence.
Not for: wallet balance (use wallet_get_portfolio), token prices (use finance_get_token_price), holder distribution (use token_get_holder_analysis).
Example agent prompts
- "Track large on-chain transactions (whale movements) on Ethereum or Base"
Payment
- Protocol: x402 -- HTTP-native pay-per-call, no signup, no API key
- Network: Base L2 (
eip155:8453) - Asset: USDC
- Facilitator: Coinbase CDP (primary), PayAI (fallback)
- Also reachable via ATXP (OAuth-wrapped x402, RFC 9728 protected-resource metadata)
Part of klymax402
100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.
- Catalog: https://klymax402.com/llms.txt
- Full API reference: https://klymax402.com/llms-full.txt
- Live stats: https://klymax402.com/stats
License
MIT
Questions fréquentes
Qu'est-ce que Whale Alert API ?
Track large on-chain whale transactions on Ethereum and Base. x402 micropayment.
Comment installer Whale Alert API ?
Il fonctionne comme serveur distant. Dans Claude Code : claude mcp add --transport sse whale-alert-api 'https://whale-alert.api.klymax402.com/mcp'. Pour les autres clients, collez la configuration JSON de cette page dans leurs réglages MCP.
Faut-il une clé API pour Whale Alert API ?
Son entrée au registre n'indique aucune clé ni secret obligatoire. Certaines fonctions peuvent tout de même demander un compte auprès du service auquel il se connecte.
Whale Alert API est-il open source ?
Oui. Son code est sur GitHub sous licence MIT.
Qui maintient Whale Alert API ?
Il est publié par Br0ski777. AI.tn le référence sans le maintenir ni le recommander.
Issu du registre MCP officiel. Être listé n'est pas une recommandation : vérifiez le code et les permissions d'un serveur avant de lui donner accès à vos données.