{"id":27592,"library":"arcade-mcp","title":"Arcade MCP","description":"The official Arcade.dev library for tool calling and MCP (Model Context Protocol) server hosting. Provides a client to list tools and execute calls, and a MCP server to expose Arcade tools to any MCP-compatible agent. Current version 1.14.1. Active development, frequent releases.","status":"active","version":"1.14.1","language":"python","source_language":"en","source_url":"https://github.com/ArcadeAI/arcade-mcp","tags":["mcp","tool-calling","arcade","ai","agent"],"install":[{"cmd":"pip install arcade-mcp","lang":"bash","label":"Install from PyPI"}],"dependencies":[],"imports":[{"note":"","wrong":"","symbol":"ToolCallClient","correct":"from arcade_mcp import ToolCallClient"},{"note":"","wrong":"","symbol":"ToolDefinition","correct":"from arcade_mcp.models import ToolDefinition"},{"note":"","wrong":"","symbol":"start_server","correct":"from arcade_mcp.server import start_server"}],"quickstart":{"code":"import os\nfrom arcade_mcp import ToolCallClient\n\n# Set environment variables (use placeholder for safety)\nos.environ['ARCADE_API_KEY'] = os.environ.get('ARCADE_API_KEY', '')\nos.environ['ARCADE_USER_ID'] = os.environ.get('ARCADE_USER_ID', '')\n\nclient = ToolCallClient()\n# List available tools\ntools = client.list_tools()\nprint(tools)\n# Example: call a tool (weather tool if available)\nresult = client.call_tool(\"Weather.GetCurrent\", {\"location\": \"San Francisco\"})\nprint(result)","lang":"python","description":"Creates a ToolCallClient, lists tools, and calls one. Requires ARCADE_API_KEY and ARCADE_USER_ID environment variables."},"warnings":[{"fix":"Always set ARCADE_API_KEY and ARCADE_USER_ID before creating the client.","message":"ToolCallClient reads API keys from environment variables ARCADE_API_KEY and ARCADE_USER_ID. If not set, client may fail silently or raise unclear auth errors.","severity":"gotcha","affected_versions":"all"},{"fix":"Use from arcade_mcp import ToolCallClient (note: arcade_mcp, not arcade).","message":"Import paths changed in early 1.x. Some older examples use from arcade.client import ToolCallClient, which no longer works.","severity":"gotcha","affected_versions":">=1.0.0"},{"fix":"Use arcade_mcp as the package name. Update any imports from arcade to arcade_mcp.","message":"The library deprecated the old arcade package name. Future releases may remove arcade top-level imports entirely.","severity":"deprecated","affected_versions":">=1.0.0"},{"fix":"Always use the full tool name as returned by list_tools().","message":"The ToolCallClient.call_tool method requires tool names with namespace (e.g., 'Weather.GetCurrent'). Omitting the namespace returns a 404 error.","severity":"gotcha","affected_versions":"all"}],"env_vars":null,"last_verified":"2026-05-09T00:00:00.000Z","next_check":"2026-08-07T00:00:00.000Z","problems":[{"fix":"Export ARCADE_API_KEY and ARCADE_USER_ID before running Python: export ARCADE_API_KEY='your_key'","cause":"Environment variable not set.","error":"KeyError: 'ARCADE_API_KEY'"},{"fix":"Change import to: from arcade_mcp import ToolCallClient","cause":"The old import path arcade was renamed to arcade_mcp.","error":"ImportError: cannot import name 'ToolCallClient' from 'arcade'"},{"fix":"Use full tool name like 'Weather.GetCurrent' (include namespace).","cause":"Tool name without namespace.","error":"ToolCallError: Tool 'GetCurrent' not found"}],"ecosystem":"pypi","meta_description":null,"install_score":null,"install_tag":null,"quickstart_score":null,"quickstart_tag":null}