{
  "markdown": "# Whale Alert API\n\n[![MCP Server](https://img.shields.io/badge/MCP-server-blue)](https://whale-alert.api.klymax402.com/mcp)\n[![x402](https://img.shields.io/badge/payments-x402-6E56CF)](https://x402.org)\n[![License: MIT](https://img.shields.io/badge/license-MIT-green)](LICENSE)\n\nWhale transaction tracker -- large on-chain transfers with sender, value, USD estimate. Market-moving alerts. Pay-per-call via [x402](https://x402.org) (USDC on Base L2) -- no API key, no signup, no rate-limit wall.\n\nPart of the [klymax402](https://klymax402.com) marketplace -- 100 x402 micropayment APIs for AI agents, one wallet, USDC on Base.\n\n## Quickstart -- MCP\n\nAdd to your MCP client config (Claude Desktop, Cursor, ElizaOS, etc.):\n\n```json\n{\n  \"mcpServers\": {\n    \"whale-alert\": {\n      \"url\": \"https://whale-alert.api.klymax402.com/mcp\"\n    }\n  }\n}\n```\n\n## Quickstart -- HTTP (x402)\n\n```bash\ncurl -X POST \"https://whale-alert.api.klymax402.com/api/whales\" \\\n  -H \"Content-Type: application/json\" \\\n  -d '{}'\n# -> 402 Payment Required, with an x402 payment challenge in the response body\n```\n\nAny x402-aware client ([`@x402/fetch`](https://www.npmjs.com/package/@x402/fetch), [`x402-agent-tools`](https://www.npmjs.com/package/x402-agent-tools), ATXP) handles the 402 -> sign -> retry cycle automatically.\n\n## Tools\n\n| Tool | Method | Path | Price | Description |\n|---|---|---|---|---|\n| `crypto_track_whale_transactions` | POST | `/api/whales` | $0.008 | Track large on-chain whale transactions |\n\n### `crypto_track_whale_transactions`\n\nUse this when you need to track large on-chain transactions (whale movements) on Ethereum or Base. Returns recent high-value transfers in JSON.\n\n**Parameters**\n\n| Name | Type | Required | Description |\n|---|---|---|---|\n| `chain` | string | no | Blockchain: 'ethereum' or 'base' (default: ethereum) |\n| `minValue` | number | no | Minimum transaction value in ETH (default: 100) |\n\n**Returns**\n\n- `transactions` -- array of whale transfers sorted by value descending\n- `from` -- sender wallet address\n- `to` -- receiver wallet address\n- `valueEth` -- transaction value in ETH\n- `valueUsd` -- estimated USD value at time of transfer\n- `txHash` -- transaction hash for on-chain verification\n- `blockNumber` -- block number of the transaction\n- `timestamp` -- when the transaction occurred\n\nExample response:\n\n```json\n{\"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}\n```\n\n**When to use**: detecting market-moving whale activity and smart money flows. Essential for trading signal generation and on-chain intelligence.\n\n**Not for**: wallet balance (use `wallet_get_portfolio`), token prices (use `finance_get_token_price`), holder distribution (use `token_get_holder_analysis`).\n\n## Example agent prompts\n\n- \"Track large on-chain transactions (whale movements) on Ethereum or Base\"\n\n## Payment\n\n- Protocol: [x402](https://x402.org) -- HTTP-native pay-per-call, no signup, no API key\n- Network: Base L2 (`eip155:8453`)\n- Asset: USDC\n- Facilitator: Coinbase CDP (primary), PayAI (fallback)\n- Also reachable via [ATXP](https://atxp.ai) (OAuth-wrapped x402, RFC 9728 protected-resource metadata)\n\n## Part of klymax402\n\n100 x402 micropayment APIs for AI agents -- one wallet, USDC on Base, zero signup.\n\n- Catalog: https://klymax402.com/llms.txt\n- Full API reference: https://klymax402.com/llms-full.txt\n- Live stats: https://klymax402.com/stats\n\n## License\n\nMIT\n",
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  "sha": "a53eefaeca0098ce9c5abb1e5c74f037b56426bf76e8d8c6e1a8d6f83e208c1a",
  "repo_slug": "br0ski777/whale-alert-x402",
  "fonte": "repo",
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  "api": "https://agentalog.com/api/listings/mcp_io_github_br0ski777_whale_alert_be3346bf/readme"
}