{
  "markdown": "# x402search MCP Server\nSearch 14,000+ x402-enabled HTTP APIs from any MCP-compatible agent.\n\n**Version:** 1.0.3 · **License:** MIT · **Cost:** $0.01 USDC per search · Base mainnet · No account needed\n\n**npm:** https://www.npmjs.com/package/x402search-mcp  \n**PyPI:** https://pypi.org/project/x402search-mcp  \n**API:** https://x402search.xyz\n\n---\n\n## Requirements\n- A wallet private key (EVM)\n- USDC on Base mainnet (eip155:8453)\n- Get USDC on Base: https://www.coinbase.com/how-to-buy/usdc\n\n---\n\n## Install: Claude Desktop\nAdd to your `claude_desktop_config.json`:\n```json\n{\n  \"mcpServers\": {\n    \"x402search\": {\n      \"command\": \"npx\",\n      \"args\": [\"x402search-mcp@1.0.3\"],\n      \"env\": {\n        \"EVM_PRIVATE_KEY\": \"0xYOUR_PRIVATE_KEY_HERE\"\n      }\n    }\n  }\n}\n```\nConfig file location:\n- **macOS:** `~/Library/Application Support/Claude/claude_desktop_config.json`\n- **Windows:** `%APPDATA%\\Claude\\claude_desktop_config.json`\n\n---\n\n## Install: Claude Code\n```bash\nclaude mcp add x402search -- npx x402search-mcp@1.0.3\n```\nThen set your key:\n```bash\nexport EVM_PRIVATE_KEY=0xYOUR_PRIVATE_KEY_HERE\n```\n\n---\n\n## Install: Cursor\nAdd to `.cursor/mcp.json`:\n```json\n{\n  \"mcpServers\": {\n    \"x402search\": {\n      \"command\": \"npx\",\n      \"args\": [\"x402search-mcp@1.0.3\"],\n      \"env\": {\n        \"EVM_PRIVATE_KEY\": \"0xYOUR_PRIVATE_KEY_HERE\"\n      }\n    }\n  }\n}\n```\n\n---\n\n## Install: Windsurf\nAdd to `~/.codeium/windsurf/mcp_config.json`:\n```json\n{\n  \"mcpServers\": {\n    \"x402search\": {\n      \"command\": \"npx\",\n      \"args\": [\"x402search-mcp@1.0.3\"],\n      \"env\": {\n        \"EVM_PRIVATE_KEY\": \"0xYOUR_PRIVATE_KEY_HERE\"\n      }\n    }\n  }\n}\n```\n\n---\n\n## Install: Python agents (LangChain, CrewAI, AutoGen, GAME SDK)\n```bash\npip install x402search-mcp\n```\n```python\nfrom x402search import search_x402_apis\nresults = search_x402_apis(\n    query=\"token price API ethereum\",\n    private_key=\"0xYOUR_PRIVATE_KEY_HERE\"\n)\nprint(results)\n```\nFull docs: https://pypi.org/project/x402search-mcp\n\n---\n\n## Quick Test\n```bash\nEVM_PRIVATE_KEY=0xYOUR_KEY npx x402search-mcp@1.0.3\n```\n\n---\n\n## Tool: search_x402_apis\n| Parameter | Type | Required | Description |\n|---|---|---|---|\n| query | string | yes | e.g. \"token price API\", \"DEX swap routing\" |\n| network | string | no | e.g. \"eip155:8453\" for Base mainnet |\n| max_price_usdc | number | no | Filter to APIs at or below this price |\n| limit | number | no | Max results (default 10, max 50) |\n\n---\n\n## Virtuals ACP Integration\nx402search is available as a native ACP agent on the Virtuals protocol marketplace.\n\n- **Agent ID:** 22531\n- **Agent profile:** https://app.virtuals.io/acp/agent-details/22531\n- **Job name:** `x402search`\n- **Price:** 0.01 USDC per search\n- Accepts crypto, DeFi, and blockchain API discovery queries\n- Rejects off-topic requests automatically at the request phase\n- Returns structured results: endpoint URLs, payment metadata, network, and relevance rank\n\n---\n\n## Links\n- npm: https://www.npmjs.com/package/x402search-mcp\n- PyPI: https://pypi.org/project/x402search-mcp\n- API: https://x402search.xyz\n- Health: https://x402search.xyz/health\n- GitHub: https://github.com/x402-index/x402search-mcp\n- x402 protocol: https://x402.org\n",
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