{
 "corrections": 1,
 "entries": [
  {
   "auto_apply": false,
   "ecosystem": "pypi",
   "fails_on": "2.3.0",
   "id": "pypi/mcp/2.3.0/0005",
   "json": "https://formachines.ai/errata/pypi/mcp/0005-context-client-id/index.json",
   "kind": "changed",
   "merged_into": null,
   "package": "mcp",
   "status": "verified",
   "symbol": "FastMCP",
   "url": "https://formachines.ai/errata/pypi/mcp/0005-context-client-id/"
  }
 ],
 "headline": "ModuleNotFoundError: No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp.server.mcpserv…",
 "kind": "missing_module",
 "kind_text": "module not found",
 "license": "https://creativecommons.org/licenses/by/4.0/",
 "messages": [
  "No module named 'mcp.server.fastmcp'. This is mcp 2.x, where FastMCP was renamed to MCPServer (from mcp.server.mcpserver import MCPServer) and other APIs changed; see the migration guide at https://py.sdk.modelcontextprotocol.io/v2/migration/#fastmcp-renamed-to-mcpserver or pin 'mcp<2' to keep runni"
 ],
 "norm": "missing_module:mcp.server.fastmcp",
 "packages": [
  "pypi/mcp"
 ],
 "slug": "missing-module--mcp-server-fastmcp",
 "symbol": "mcp.server.fastmcp",
 "type": "ModuleNotFoundError",
 "updated": "2026-10-27",
 "url": "https://formachines.ai/errata/errors/missing-module--mcp-server-fastmcp/"
}