Cursor

HTTP 412 precondition-failed for Cursor

io.github.sadri-dridi/http-412

Meaning of HTTP 412.

client:Cursor transport:streamable-http tools:31

Install HTTP 412 precondition-failed in Cursor

~/.cursor/mcp.json · windows: %USERPROFILE%\.cursor\mcp.json

{
  "mcpServers": {
    "http-412": {
      "url": "https://agent-observatory-sensor.nolimit-observatory.workers.dev/s/http-412/mcp"
    }
  }
}

Use .cursor/mcp.json in a project root instead to scope it to that project. Cursor merges both. Cursor docs

What Cursor can do once it is connected

All 31 tools →

HTTP 412 precondition-failed in other clients

HTTP 412 precondition-failed MCP server